About: http://webisa.webdatacommons.org/102144346

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	In addition, since the vent pipes are normally connected to various types of drains, no precautions are needed to prevent the ingress of rainwater or the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com