Sample SPARQL Query

gistfile1.txt

SELECT DISTINCT ?trial ?location ?facility ?name ?address ?address_country ?address_city
        ?address_state ?address_zip ?country
        WHERE {
VALUES ( ?trial )
{ ( <http://data.linkedct.org/resource/trial/nct01668589> ) } .

           ?trial linkedct:trial_location ?location .
           ?location linkedct:location_facility ?facility .
           ?facility linkedct:facility_address ?address ;
                        linkedct:facility_facility_name ?name .
           ?address linkedct:address_country ?address_country ;
                         linkedct:address_city ?address_city .
           ?address_country rdfs:label ?country .
           ?address_city rdfs:label ?city .
           OPTIONAL {
           ?address  linkedct:address_state ?address_state ;
                         linkedct:address_zip ?address_zip .
           }
       }