<http://webisa.webdatacommons.org/prov/1534617> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/222129573> . <http://webisa.webdatacommons.org/222129573> <http://www.w3.org/ns/prov#value> "biological contaminants such as bacteria, viruses, yeasts, molds," . <http://webisa.webdatacommons.org/222129573> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/222129573> <http://www.w3.org/ns/prov#wasQuotedFrom> <faqs.org> .