About: http://webisa.webdatacommons.org/375709251

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	They also check for dissolved oxygen levels, which are lowered by excess nutrients such as nitrogen and phosphorus, that contribute to fish kills.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com