About: http://webisa.webdatacommons.org/249787311

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	Since water is a basic human need and these needs grew, so the potential requirement for heavy labor provided a strong incentive for invention.
http://www.w3.org/ns/prov#wasQuotedFrom	questia.com