About: http://webisa.webdatacommons.org/53939643

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	However the speed of sound may vary depending on such conditions as temperature and composition, so the speed expressed in Mach number is also variable.
http://www.w3.org/ns/prov#wasQuotedFrom	rt.com