About: http://webisa.webdatacommons.org/99218180

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 would put the two of them, so the final product would be a tryptic, Before the collaps, After and Today...with a legend of possible years and other informations, it would look very interesting and documented style.
http://www.w3.org/ns/prov#wasQuotedFrom	cartographersguild.com