<http://webisa.webdatacommons.org/102237526>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/102237526>	<http://www.w3.org/ns/prov#value>	"In this configuration, the mirror 68 is held at three spatial positions which may be included in a single plane. The mirror 66, therefore, is not distorted to a shape including a concave or a convex surface. Also, at each position, the mirror" .
<http://webisa.webdatacommons.org/prov/31601695>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/102237526> .
<http://webisa.webdatacommons.org/102237526>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<docstoc.com> .