About: http://webisa.webdatacommons.org/205146161

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	Part of what makes solving GR hard is that it is highly non-linear, i.e. the things that cause the curvature of spacetime (i.e. mass and energy) are themselves subject to the effects of curved spacetime.
http://www.w3.org/ns/prov#wasQuotedFrom	discovermagazine.com