About: http://webisa.webdatacommons.org/188306403

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	Joe Ye Through Revit UI command, we can hide group by picking it and click the hide command like other elements.
http://www.w3.org/ns/prov#wasQuotedFrom	typepad.com