About: http://webisa.webdatacommons.org/287498301

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	What you want instead is to use next() which returns a String, and then check if this String is an integer or not.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com