About: http://webisa.webdatacommons.org/258146084

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	Similarly, certain municipalities may add an odorant, such as mercaptan, which includes sulfur, to natural gas for safety reasons.
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com