{ "items" : [
    { "id" : "http://webisa.webdatacommons.org/266765138"
      "properties" : {
        "http://www.w3.org/1999/02/22-rdf-syntax-ns#type" : [ "http://www.w3.org/ns/prov#Entity" ] ,
        "http://www.w3.org/ns/prov#value" : [ "One of them, for example has been using the one thousand or two thousand stars that are closest to the center of our galaxy, following their orbits around what we know now is a central black hole in our galaxy and measuring the mass of the back hole, which it turns out to be a few million times massive than the Sun." ] ,
        "http://www.w3.org/ns/prov#wasQuotedFrom" : [ "pbs.org" ] } },

    { "id" : "http://webisa.webdatacommons.org/prov/166345665"
      "properties" : {
        "http://www.w3.org/ns/prov#wasDerivedFrom" : [ "http://webisa.webdatacommons.org/266765138"] } } }
