{ "items" : [
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      "properties" : {
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        "http://www.w3.org/ns/prov#value" : [ "These mechanisms typically involve determining an advertisement to be displayed, such as a banner advertisement, based on user preferences stored, for example, in a user profile file." ] ,
        "http://www.w3.org/ns/prov#wasQuotedFrom" : [ "google.com" ] } },

    { "id" : "http://webisa.webdatacommons.org/prov/82382216"
      "properties" : {
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