About: http://webisa.webdatacommons.org/172728657

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	At this point, the spacer is a grain-like material made of BaO or the like, and the spacer itself may have moisture absorbing characteristics.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com