<http://webisa.webdatacommons.org/423960852> <http://www.w3.org/ns/prov#wasQuotedFrom> <google.com> . <http://webisa.webdatacommons.org/423960852> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/prov/114103541> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/423960852> . <http://webisa.webdatacommons.org/prov/90979441> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/423960852> . <http://webisa.webdatacommons.org/423960852> <http://www.w3.org/ns/prov#value> "Here, although the illustrated window cover system 223 includes a generally rectangular frame 100, it will be understood from the following discussion that a frame 100 is not required???the system 223 requires only that the track be mounted in place, over an opening such as a window or a door, or simply over an are to be covered, for example, for decorative purposes." .