{ "items" : [
    { "id" : "http://webisa.webdatacommons.org/143430857"
      "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" : [ "wherein M is an alkali metal, e.g. lithium, sodium, or potassium, M??? is an alkaline earth metal such as Mg, Ca or Sr, each R represents an alkyl radical containing from 1 to 8 carbon atoms, each R??? radical represents a substituent selected from those consisting of alkyl radicals containing from 1 to 8 carbon atoms (i.e. R radicals) and aryl radicals of the benzene series containing from 6 to 9" ] ,
        "http://www.w3.org/ns/prov#wasQuotedFrom" : [ "google.es" ] } },

    { "id" : "http://webisa.webdatacommons.org/prov/131693183"
      "properties" : {
        "http://www.w3.org/ns/prov#wasDerivedFrom" : [ "http://webisa.webdatacommons.org/143430857"] } } }
