About: http://webisa.webdatacommons.org/81224992

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	So, by analogy between NaN and other common things which are not a number, NaN should be true as well.
http://www.w3.org/ns/prov#wasQuotedFrom	perlmonks.org