About: http://webisa.webdatacommons.org/2000276

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	But no particular building materials are required, the only special machinery required for maintenance is a vacuum big enough to handle a surface 200x85, and the installation compared to real ice is virtually nil.
http://www.w3.org/ns/prov#wasQuotedFrom	bleacherreport.com