About: http://webisa.webdatacommons.org/386971498

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	A sound wave is known to reflect off canyon walls and other obstacles to produce an echo.
http://www.w3.org/ns/prov#wasQuotedFrom	physicsclassroom.com