About: http://webisa.webdatacommons.org/383961036

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	Whether your structure is a tower or a solid structure such as a chimney or building there are many factors that can affect obstruction marking requirements, such as weather, terrain, proximity to airports, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	unimar.com