About: http://webisa.webdatacommons.org/452266567

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	The issue here is you need to pass open() a string. ask is a variable that contains a string, but we also want to append the other string .csv to it to make it a filename.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com