<http://webisa.webdatacommons.org/286709435> <http://www.w3.org/ns/prov#wasQuotedFrom> <sec.gov> . <http://webisa.webdatacommons.org/286709435> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/286709435> <http://www.w3.org/ns/prov#value> "Acetylene is a gas that is considered toxic, unstable, emits soot when it burns and can be volatile." . <http://webisa.webdatacommons.org/prov/486391864> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/286709435> .