About: http://webisa.webdatacommons.org/289812246

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	No, there is no such thing as negative mass, just like there are no negative dimensions, time, momentum, energy, weight and probably a few more things. shavera
http://www.w3.org/ns/prov#wasQuotedFrom	phys.org