About: http://webisa.webdatacommons.org/409472073

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	The scum is composed of lighter materials such as grease, oil, soap, and so forth.
http://www.w3.org/ns/prov#wasQuotedFrom	ck12.org