About: http://webisa.webdatacommons.org/135279313

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 have a vague recollection that there is a mystery involved in which the mason's mark is some sort of clue, and something about white stone.
http://www.w3.org/ns/prov#wasQuotedFrom	metafilter.com