About: http://webisa.webdatacommons.org/438672522

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	Within large buildings such as offices, factories, department stores, hospitals, schools, etc., it is often desirable to be able to produce different tones indicative of selected conditions.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com