About: http://webisa.webdatacommons.org/44846370

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	Ports often were marked by aids to navigation, such as lighthouses, and defended by fortifications at their entry points.
http://www.w3.org/ns/prov#wasQuotedFrom	flheritage.com