About: http://webisa.webdatacommons.org/218924677

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	The presence of mechanisms to prevent backflow (e.g., trapping, venting) will prevent sewer gases, pests, microorganisms or other contaminants from entering the establishment through the plumbing system.
http://www.w3.org/ns/prov#wasQuotedFrom	inspection.gc.ca