{ "items" : [
    { "id" : "http://webisa.webdatacommons.org/317584506"
      "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" : [ "Although services such as Google's AdSense??? have enabled advertisers to target ads to the topics or concepts of content on a Web page, some Web pages are fairly general (e.g., those pertaining to general categories such as autos, careers, health, etc.) which makes it difficult to achieve high levels of ad performance, such as the levels of ad performance associated with ads targeted to Web pages" ] ,
        "http://www.w3.org/ns/prov#wasQuotedFrom" : [ "google.com" ] } },

    { "id" : "http://webisa.webdatacommons.org/prov/437448033"
      "properties" : {
        "http://www.w3.org/ns/prov#wasDerivedFrom" : [ "http://webisa.webdatacommons.org/317584506"] } } }
