About: http://webisa.webdatacommons.org/284756180

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	I think the preference for the is simply because most people feel it is awkward to use two indefinite articles in the same "set phrase - even more so in OP's example, where there is another one in a million years just before it.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com