About: http://webisa.webdatacommons.org/405057130

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	Figure 1 is a map of the tidal Potomac River and Estuary showing water-quality
http://www.w3.org/ns/prov#wasQuotedFrom	usgs.gov