<http://webisa.webdatacommons.org/91208478> <http://www.w3.org/ns/prov#wasQuotedFrom> <google.fr> . <http://webisa.webdatacommons.org/91208478> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/91208478> <http://www.w3.org/ns/prov#value> "An optical pipe illumination system is provided for coupling light from an illumination source to a number of output light pipes\", which are used for a variety of purposes, such as illuminating pools, spas, hazardous material zones, jail cells, and other applications where direct lighting is dangerous, difficult to maintain, or subject to vandalism." . <http://webisa.webdatacommons.org/prov/110620802> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/91208478> .