About: http://webisa.webdatacommons.org/79502189

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	???As it turns out, the vacuum is not empty - there is a difference between the vacuum and nothingness,??? he stated. ???Surprisingly, of all known ???substances???, the vacuum is the least well understood.???
http://www.w3.org/ns/prov#wasQuotedFrom	phys.org