berov_sample_code.output

'phones' => bless( [
                               bless( do{\(my $o = bless( {
                                                 'xml' => undef,
                                                 'tree' => [
                                                             'tag',
                                                             'div',
                                                             {
                                                               'itemprop' => 'telephone',
                                                               'class' => 'mn-member-phone1'
                                                             },
                                                             undef,
                                                             [
                                                               'text',
                                                               '(912) 634-7377',
                                                               ${$VAR1->{'phones'}[0]}->{'tree'}
                                                             ]
                                                           ]
                                               }, 'Mojo::DOM::HTML' ))}, 'Mojo::DOM' ),
                               bless( do{\(my $o = bless( {
                                                 'xml' => undef,
                                                 'tree' => [
                                                             'tag',
                                                             'div',
                                                             {
                                                               'itemprop' => 'telephone',
                                                               'class' => 'mn-member-phone2'
                                                             },
                                                             undef,
                                                             [
                                                               'text',
                                                               '(800) 569-1955',
                                                               ${$VAR1->{'phones'}[1]}->{'tree'}
                                                             ]
                                                           ]
                                               }, 'Mojo::DOM::HTML' ))}, 'Mojo::DOM' )
                             ], 'Mojo::Collection' )

gistfile1.txt

This:

sub parse_phones {
  my $self = shift;
  my $dom = shift;
  my $phones = $dom->at( '#mn-member-general > div > div.mn-member-basicinfo' )->attr( 'itemprop' => 'telephone' );
  return $phones;
}

hoping to see:

  'phones' => [ '912-555-1212', '800-555-1212' ], 

got me this close:  

          'phones' => bless( do{\(my $o = bless( {
                                        'tree' => [
                                                    'tag',
                                                    'div',
                                                    {
                                                      'itemscope' => 'itemscope',
                                                      'class' => 'mn-member-basicinfo',
                                                      'itemtype' => 'http://schema.org/PostalAddress',
                                                      'itemprop' => 'telephone'
                                                    },
                                                    undef,
                                                    [
                                                      'text',
                                                      '
                                                        ',
                                                      ${$VAR1->{'phones'}}->{'tree'}
                                                    ],
                                                    [
                                                      'tag',
                                                      'div',
                                                      {
                                                        'itemprop' => 'streetAddress',
                                                        'class' => 'mn-member-address'
                                                      },
                                                      ${$VAR1->{'phones'}}->{'tree'},
                                                      [
                                                        'text',
                                                        '103 Main Street',
                                                        ${$VAR1->{'phones'}}->{'tree'}->[5]
                                                      ]
                                                    ],
                                                    [
                                                      'text',
                                                      '
                                                        ',
                                                      ${$VAR1->{'phones'}}->{'tree'}
                                                    ],
                                                    [
                                                      'tag',
                                                      'div',
                                                      {
                                                        'class' => 'mn-member-cistpost'
                                                      },
                                                      ${$VAR1->{'phones'}}->{'tree'},
                                                      [
                                                        'tag',
                                                        'span',
                                                        {
                                                          'itemprop' => 'addressLocality'
                                                        },
                                                        ${$VAR1->{'phones'}}->{'tree'}->[7],
                                                        [
                                                          'text',
                                                          'St. Simons Island',
                                                          ${$VAR1->{'phones'}}->{'tree'}->[7]->[4]
                                                        ]
                                                      ],

along with other cruft . . . 

                                                    [
                                                      'tag',
                                                      'div',
                                                      {
                                                        'itemprop' => 'telephone',
                                                        'class' => 'mn-member-phone1'
                                                      },
                                                      ${$VAR1->{'phones'}}->{'tree'},
                                                      [
                                                        'text',
                                                        '(912) 555-1212',
                                                        ${$VAR1->{'phones'}}->{'tree'}->[9]
                                                      ]
                                                    ],
                                                    [
                                                      'tag',
                                                      'div',
                                                      {
                                                        'class' => 'mn-member-phone2',
                                                        'itemprop' => 'telephone'
                                                      },
                                                      ${$VAR1->{'phones'}}->{'tree'},
                                                      [
                                                        'text',
                                                        '(800) 555-1212',
                                                        ${$VAR1->{'phones'}}->{'tree'}->[11]
                                                      ]
                                                    ],
                                                    [
                                                      'text',
                                                      '
                            ',
                                                      ${$VAR1->{'phones'}}->{'tree'}
                                                    ],
                                                    [
                                                      'tag',
                                                      'div',
                                                      {
                                                        'itemprop' => 'faxNumber',
                                                        'class' => 'mn-member-fax'
                                                      },
                                                      ${$VAR1->{'phones'}}->{'tree'},
                                                      [
                                                        'text',
                                                        '(912) 555-1234 (fax)',
                                                        ${$VAR1->{'phones'}}->{'tree'}->[13]
                                                      ]
                                                    ],
                                                    [
                                                      'text',
                                                      '
                                                                        ',
                                                      ${$VAR1->{'phones'}}->{'tree'}
                                                    ]
                                                  ],
                                        'xml' => undef
                                      }, 'Mojo::DOM::HTML' ))}, 'Mojo::DOM' ),

snippet.html

 <div id="mn-member-general" class="mn-section">
                    <div class="mn-section-content">
						<div id="mn-member-name-nologo">Cal Duke Publishing, Inc.</div>
                        <div class="mn-memberinfo-block-actions">
                            <ul>
                                <li id="mn-memberinfo-block-website"><a itemprop="url" href="http://www.caldukepublishing.com/" class="mn-print-url" onclick="MNI.Hit.MemberWebsite(2076)" title="Visit the website of Cal Duke Publishing, Inc." target="_blank">Visit Website</a></li>
                                                                                                                                                                        </ul>
                        </div>
						<div itemprop="address" itemscope="itemscope" itemtype="http://schema.org/PostalAddress" class="mn-member-basicinfo">
							<div itemprop="streetAddress" class="mn-member-address">103 Thompson Cove</div>
							<div class="mn-member-cistpost"><span itemprop="addressLocality">St. Simons Island</span>,&nbsp;<span itemprop="addressRegion">GA </span><span itemprop="postalCode">31522</span></div>
							<div itemprop="telephone" class="mn-member-phone1">(912) 634-7377</div>
							<div itemprop="telephone" class="mn-member-phone2">(800) 569-1955</div>
                            <div itemprop="faxNumber" class="mn-member-fax">(912) 638-0515 (fax)</div>
                            						</div>
                                        </div>
                </div>

$dom->find('div[itemprop="telephone"]')->each(sub{say shift->text});
Can you try this?
or
my @Phones = $dom->find('div[itemprop="telephone"]')->map('text')->each;