About: http://webisa.webdatacommons.org/377355653

Property	Value
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	To remove the first element of an array (I suppose columns is a field of your JSON Object):
http://www.w3.org/ns/prov#wasQuotedFrom	codingforums.com