About: http://webisa.webdatacommons.org/201197895

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 invention also includes means, such as an electrode, placed adjacent the electro-optically active crystal for applying a suitable electromagnetic field thereto for changing the index of refraction of the material.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au