About: http://webisa.webdatacommons.org/254427824

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	I guess you need quotes around yes : choice =='yes' , otherwise python will think that yes is a variable.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com