About: http://webisa.webdatacommons.org/343915158

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	Beams, girders, pipes, ducts or other obstructions spaced not less than 4 feet on center
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com