{ "items" : [
    { "id" : "http://webisa.webdatacommons.org/prov/212839128"
      "properties" : {
        "http://www.w3.org/ns/prov#wasDerivedFrom" : [ "http://webisa.webdatacommons.org/304064165" ] } },

    { "id" : "http://webisa.webdatacommons.org/prov/213660230"
      "properties" : {
        "http://www.w3.org/ns/prov#wasDerivedFrom" : [ "http://webisa.webdatacommons.org/304064165" ] } },

    { "id" : "http://webisa.webdatacommons.org/304064165"
      "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" : [ "The study protocol was approved by the Duke University Institutional Review Board.Data CollectionDomains for which information pertaining to the year before and the year during pregnancy was solicited included the following; demographic characteristics, health status, reproductive factors, lifestyle factors such as tobacco and alcohol use, anthropometric measurements before pregnancy and dietary s" ] ,
        "http://www.w3.org/ns/prov#wasQuotedFrom" : [ "pubmedcentralcanada.ca" ] } },

    { "id" : "http://webisa.webdatacommons.org/prov/268735574"
      "properties" : {
        "http://www.w3.org/ns/prov#wasDerivedFrom" : [ "http://webisa.webdatacommons.org/304064165" ] } },

    { "id" : "http://webisa.webdatacommons.org/prov/273295128"
      "properties" : {
        "http://www.w3.org/ns/prov#wasDerivedFrom" : [ "http://webisa.webdatacommons.org/304064165"] } } }
