About: http://webisa.webdatacommons.org/30513107

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	However, one of the blocks in the upper course was held in place mainly by the pressure of the blocks on either side.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com