<http://webisa.webdatacommons.org/129028837> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/129028837> <http://www.w3.org/ns/prov#wasQuotedFrom> <google.com> . <http://webisa.webdatacommons.org/prov/34116402> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/129028837> . <http://webisa.webdatacommons.org/129028837> <http://www.w3.org/ns/prov#value> "Also, the polyphosphate is known to contribute to enhancing a tooth whitening effect since it can effectively remove stains formed on a surface of teeth, specially those formed of metal such as iron, calcium, magnesium, etc. from foods or working circumstances." .