About: http://webisa.webdatacommons.org/152192286

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	@tchrist I disagree that Ngrams is useless, but your point that it varies from publisher to publisher is a good one.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com