About: http://webisa.webdatacommons.org/378400643

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	A number of forms of apparatus have been developed for this purpose. and whilemost of them are satisfactory from, the; standpoint of operation, they are quite complicated and expensive to manufacture.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com