About: http://webisa.webdatacommons.org/211695592

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 Hereford patent shows a well pump including chambers that are costly and complex, among other disadvantages.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com