About: http://webisa.webdatacommons.org/30267377

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	modify the text in file (millions of columns, tab-delimited) - delete all tabs except the first one and add new columns behind the final column
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com