About: http://webisa.webdatacommons.org/279386914

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	For whatever it is worth, I have myself watched the pressure testing of quite a few different types of plastic pipes over a great many years (though admittedly in my case in a laboratory, as opposed to underground setting).
http://www.w3.org/ns/prov#wasQuotedFrom	eng-tips.com