About: http://webisa.webdatacommons.org/456584538

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 conversation I discover that there is a U-bend or trap on the outward side of the manhole and above it a sort of trap door which can be removed if the pipe on the outward side needs rodding.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com