About: http://webisa.webdatacommons.org/151298505

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	But the major factor has been the cleaning up of Britain's waterways, such that trout and salmon have returned to the Thames and other major rivers after a barren period of almost 50 years.
http://www.w3.org/ns/prov#wasQuotedFrom	issuu.com