About: http://webisa.webdatacommons.org/391106712

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	Proponents also claim that melatonin is a powerful anti-oxidant, a compound that blocks the action of free radicals, activated oxygen molecules that can damage cells.
http://www.w3.org/ns/prov#wasQuotedFrom	cancer.org