About: http://webisa.webdatacommons.org/128993508

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	Over time, the existence of such a medium, permeating all space and yet apparently undetectable by mechanical means, proved more and more difficult to reconcile with experiments such as the Michelson???Morley experiment.
http://www.w3.org/ns/prov#wasQuotedFrom	poemhunter.com