About: http://webisa.webdatacommons.org/166163236

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 stage area 40 in a conventional overhead projector includes a transparent sheet such as glass typically having at least one Fresnel lens integrally formed therein for focusing light toward the head 34.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com