<http://webisa.webdatacommons.org/87636626> <http://www.w3.org/ns/prov#wasQuotedFrom> <faqs.org> . <http://webisa.webdatacommons.org/87636626> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/prov/426770378> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/87636626> . <http://webisa.webdatacommons.org/prov/426791375> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/87636626> . <http://webisa.webdatacommons.org/87636626> <http://www.w3.org/ns/prov#value> "aldehydes, such as formaldehyde or acetaldehyde, are involved." .