About: http://webisa.webdatacommons.org/250484221

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	It is often difficult to determine if the symptoms are a result of exposure to an indoor are pollutant.
http://www.w3.org/ns/prov#wasQuotedFrom	tchd.net