About: http://webisa.webdatacommons.org/128903154

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	Here it is: Apostrophes are used to form plurals of letters that appear in lowercase; here the rule appears to be more typographical than grammatical, e.g. three ps" versus three p's.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com