What is making this fail?

data.json

{
  "key": "September",
  "values": [
    {
      "key": "30",
      "values": [
        {
          "key": "Semantic Arts",
          "values": [
            {
              "key": "Mktg -- SpeakingEngage",
              "values": [
                {
                  "Posted": "2014-09-30T14:37:14Z",
                  "Task": "Mktg -- SpeakingEngage",
                  "Log": "writing up the Data Centric Manifesto for Dataversity",
                  "Hours": 1,
                  "Sponsor": "Semantic Arts",
                  "StartTime": "2014-09-30T14:00:00Z",
                  "Employee": "David W McComb",
                  "EndTime": "2014-09-30T15:00:00Z",
                  "Location": "Colorado"
                }
              ]
            }
          ]
        }
      ]
    },
    {
      "key": "29",
      "values": [
        {
          "key": "Semantic Arts",
          "values": [
            {
              "key": "IBeam&NailGun",
              "values": [
                {
                  "Posted": "2014-09-29T21:13:20Z",
                  "Task": "IBeam&NailGun",
                  "Log": "finished up apps, sent email out to team to get feedback. Built out an Overview app just for editing the reimbursement status. ",
                  "Hours": 2,
                  "Sponsor": "Semantic Arts",
                  "StartTime": "2014-09-29T19:00:00Z",
                  "Employee": "Andrea N Engelstad",
                  "EndTime": "2014-09-29T21:00:00Z",
                  "Location": "Colorado"
                },
                {
                  "Posted": "2014-09-29T21:10:29Z",
                  "Task": "IBeam&NailGun",
                  "Log": "work on figuring out rounding query. finished up display query for lodging. Built mileage reimbursement app. ",
                  "Hours": 3.5,
                  "Sponsor": "Semantic Arts",
                  "StartTime": "2014-09-29T14:00:00Z",
                  "Employee": "Andrea N Engelstad",
                  "EndTime": "2014-09-29T17:30:00Z",
                  "Location": "Colorado"
                }
              ]
            },
            {
              "key": "Staff Development",
              "values": [
                {
                  "Posted": "2014-09-30T14:21:57Z",
                  "Task": "Staff Development",
                  "Log": "Staff lunch with Andi",
                  "Hours": 1,
                  "Sponsor": "Semantic Arts",
                  "StartTime": "2014-09-29T17:30:00Z",
                  "Employee": "David W McComb",
                  "EndTime": "2014-09-29T18:30:00Z",
                  "Location": "Colorado"
                }
              ]
            },
            {
              "key": "Governance",
              "values": [
                {
                  "Posted": "2014-09-29T21:11:34Z",
                  "Task": "Governance",
                  "Log": "Quarterly Lunch with Dave",
                  "Hours": 1,
                  "Sponsor": "Semantic Arts",
                  "StartTime": "2014-09-29T17:30:00Z",
                  "Employee": "Andrea N Engelstad",
                  "EndTime": "2014-09-29T18:30:00Z",
                  "Location": "Colorado"
                }
              ]
            },
            {
              "key": "Marketing",
              "values": [
                {
                  "Posted": "2014-09-30T14:21:28Z",
                  "Task": "Marketing",
                  "Log": "various logistics for trip to NYC, ",
                  "Hours": 2,
                  "Sponsor": "Semantic Arts",
                  "StartTime": "2014-09-29T14:00:00Z",
                  "Employee": "David W McComb",
                  "EndTime": "2014-09-29T23:00:00Z",
                  "Location": "Colorado"
                }
              ]
            },
            {
              "key": "Visualization R&D",
              "values": [
                {
                  "Posted": "2014-09-30T14:20:02Z",
                  "Task": "Visualization R&D",
                  "Log": "Spent the morning trying to get the  query with class, subclass and instance ot work.  Then a chunk of the afternoon trying unsuccessfully to find out why the restful queries weren't working, and some time on actual javascript.",
                  "Hours": 6,
                  "Sponsor": "Semantic Arts",
                  "StartTime": "2014-09-29T14:00:00Z",
                  "Employee": "David W McComb",
                  "EndTime": "2014-09-29T23:00:00Z",
                  "Location": "Colorado"
                }
              ]
            }
          ]
        },
        {
          "key": "Sagence",
          "values": [
            {
              "key": "SLA Ontology",
              "values": [
                {
                  "Posted": "2014-09-29T23:30:32Z",
                  "Task": "SLA Ontology",
                  "Log": "review tasks, plan week, get SPARQL queries working for cyc update, and tidy up for demo to Mke Pool",
                  "Hours": 9,
                  "Sponsor": "Sagence",
                  "StartTime": "2014-09-29T13:30:00Z",
                  "Employee": "Michael F Uschold",
                  "EndTime": "2014-09-29T23:30:00Z",
                  "Location": "New Jersey"
                }
              ]
            }
          ]
        }
      ]
    },
    {
      "key": "28",
      "values": [
        {
          "key": "Sagence",
          "values": [
            {
              "key": "SLA Ontology",
              "values": [
                {
                  "Posted": "2014-09-29T23:29:06Z",
                  "Task": "SLA Ontology",
                  "Log": "review handoff notes from last week from DMc",
                  "Hours": 1,
                  "Sponsor": "Sagence",
                  "StartTime": "2014-09-29T01:00:00Z",
                  "Employee": "Michael F Uschold",
                  "EndTime": "2014-09-29T02:00:00Z",
                  "Location": "New Jersey"
                }
              ]
            }
          ]
        },
        {
          "key": "Semantic Arts",
          "values": [
            {
              "key": "Acctg",
              "values": [
                {
                  "Posted": "2014-09-28T21:21:14Z",
                  "Task": "Acctg",
                  "Log": "reconcilling two months worth of Amex",
                  "Hours": 6,
                  "Sponsor": "Semantic Arts",
                  "StartTime": "2014-09-28T15:00:00Z",
                  "Employee": "David W McComb",
                  "EndTime": "2014-09-28T21:00:00Z",
                  "Location": "Colorado"
                }
              ]
            },
            {
              "key": "Marketing",
              "values": [
                {
                  "Posted": "2014-09-29T02:12:09Z",
                  "Task": "Marketing",
                  "Log": "Travel from Salt Lake to JFK,  more work on datacentric manifiesto, drafted nice abstract and introduction, started on some of the main sections",
                  "Hours": 4,
                  "Sponsor": "Semantic Arts",
                  "StartTime": "2014-09-28T13:30:00Z",
                  "Employee": "Michael F Uschold",
                  "EndTime": "2014-09-28T22:30:00Z",
                  "Location": "In Transit"
                }
              ]
            },
            {
              "key": "Unusable Travel sagence\/ Gs",
              "values": [
                {
                  "Posted": "2014-09-29T02:11:02Z",
                  "Task": "Unusable Travel sagence\/ Gs",
                  "Log": "from Salt Lake to JFK to apartment",
                  "Hours": 5,
                  "Sponsor": "Semantic Arts",
                  "StartTime": "2014-09-28T13:30:00Z",
                  "Employee": "Michael F Uschold",
                  "EndTime": "2014-09-28T22:30:00Z",
                  "Location": "In Transit"
                }
              ]
            }
          ]
        }
      ]
    }
  ]
}