About: http://webisa.webdatacommons.org/3028663

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	from indoor or outdoor sources, and biological contaminants such as molds, pollen, viruses and bacteria.
http://www.w3.org/ns/prov#wasQuotedFrom	sec.gov