About: http://webisa.webdatacommons.org/181187239

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 apparatus is particularly useful in allowing for three man tripping, freeing up the fourth and fifth crew member normally required for trips on a conventional drill rig.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au