About: http://webisa.webdatacommons.org/258437996

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	Fire and explosion hazards are usually a concern only when the gases collect in a confined space such as a building or a basement.
http://www.w3.org/ns/prov#wasQuotedFrom	cdc.gov