About: http://webisa.webdatacommons.org/362973754

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	So 20 miles is an estimate of how far their songs can be readily distinguished (using our instruments, I am not sure if there is any way to tell how far away other humpbacks can hear the songs).
http://www.w3.org/ns/prov#wasQuotedFrom	damninteresting.com