About: http://webisa.webdatacommons.org/21619489

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 second rigid tube can be made of glass, silica, ceramic, metal, plastic or other materials, and can be the same or different as the rigid tube 28.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com