{ "items" : [
    { "id" : "http://webisa.webdatacommons.org/308683698"
      "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" : [ "In two studies, missing data were a problem, and systematic analyses addressing the potential effects of differential attrition were not conducted." ] ,
        "http://www.w3.org/ns/prov#wasQuotedFrom" : [ "samhsa.gov" ] } },

    { "id" : "http://webisa.webdatacommons.org/prov/223906075"
      "properties" : {
        "http://www.w3.org/ns/prov#wasDerivedFrom" : [ "http://webisa.webdatacommons.org/308683698" ] } },

    { "id" : "http://webisa.webdatacommons.org/prov/225910596"
      "properties" : {
        "http://www.w3.org/ns/prov#wasDerivedFrom" : [ "http://webisa.webdatacommons.org/308683698"] } } }
