About: http://webisa.webdatacommons.org/452964851

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 speed of light was a real problem, but the biggest problem was the theory of matter.
http://www.w3.org/ns/prov#wasQuotedFrom	jackkruse.com