About: http://webisa.webdatacommons.org/403920262

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	well clearly you want to check whether the input is an empty space or a string... i was doing this in Python 3.1 and it goes like this
http://www.w3.org/ns/prov#wasQuotedFrom	dreamincode.net