About: http://webisa.webdatacommons.org/116437313

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	Bulb 21 is made of rubber, plastic or other suitable flexible material which permits manual compression and causes the bulb to resume its original shape very quickly upon termination of such pressure.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com