About: http://webisa.webdatacommons.org/302243615

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	What makes some laser beams visible and other laser beams invisible?
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com