About: http://webisa.webdatacommons.org/404373498

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	Light passing through any dense medium, such as glass or water, is appreciably slowed by the medium.
http://www.w3.org/ns/prov#wasQuotedFrom	pitt.edu