About: http://webisa.webdatacommons.org/308770752

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	ny other chemical or biological substance, compound, or material suspected of being present in a sample of interest, including, but not limited to, a toxic substance, such as a pollutant, or a biological or chemical warfare agent.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com