{ "items" : [
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      "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" : [ "Because, if it returns 0, you cannot figure out there is a path which sums up to 0 or the tree is empty." ] ,
        "http://www.w3.org/ns/prov#wasQuotedFrom" : [ "leetcode.com" ] } },

    { "id" : "http://webisa.webdatacommons.org/prov/497348545"
      "properties" : {
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