{
  "prefix": {
    "ex": "http://example.org/"
  },
  "activity": {
    "ex:a1": {
      "prov:startTime": "2014-06-23T12:28:53.809+01:00",
      "prov:endTime": "2014-06-23T12:28:53.809+01:00"
    }
  }
}