About: http://webisa.webdatacommons.org/234023947

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	However, making curved mirrors is a difficult task, and few good mirrors parabolic mirror suppliers exist.
http://www.w3.org/ns/prov#wasQuotedFrom	garratt.info