About: http://webisa.webdatacommons.org/439586278

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	How about point it out that light is a wave (or a particle) and things (like dust) can stop it?
http://www.w3.org/ns/prov#wasQuotedFrom	scienceblogs.com