About: http://webisa.webdatacommons.org/413353363

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	Of the 425 shellmounds that once existed in the Bay Area, according to a 1909 survey, only about 30 remain, the rest having been destroyed to build shopping malls, factories and other developments.
http://www.w3.org/ns/prov#wasQuotedFrom	hcn.org