About: http://webisa.webdatacommons.org/357807560

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	Because, yes, people would tip their chamber pots, and animals would defecate, and there would be all kinds of waste just thrown into the streets, which were dirt.
http://www.w3.org/ns/prov#wasQuotedFrom	believermag.com