About: http://webisa.webdatacommons.org/246530386

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	Chart symbols used to describe obstructions and hazards such as rocks, reefs, or wrecks are the ones we want to be able to identify.
http://www.w3.org/ns/prov#wasQuotedFrom	boattrader.com