About: http://webisa.webdatacommons.org/7931451

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 strictest criteria to define a vacuum is a region of space and time where all the components of the stress???energy tensor are zero.
http://www.w3.org/ns/prov#wasQuotedFrom	wikipedia.org