About: http://webisa.webdatacommons.org/436510051

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 difference is that for Spirit expressions you have to think about the attribute types of the parts of the expression, not the C++ types of those.
http://www.w3.org/ns/prov#wasQuotedFrom	boost-spirit.com