About: http://webisa.webdatacommons.org/268505173

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	Suitable materials for the background region include metals, semiconductors, and ceramics, especially germanium silicon, gallium arsenide, alumina, and sapphire.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com