About: http://webisa.webdatacommons.org/69110849

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	However, the design has some serious drawbacks, such as weight of the water-filled ball, which can???t really be supported by most roofs.
http://www.w3.org/ns/prov#wasQuotedFrom	jetsongreen.com