About: http://webisa.webdatacommons.org/449291483

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	by SciShow 1 week ago226,327 views If our teeth are made mostly of calcium, why do we use fluoride to keep them healthy?
http://www.w3.org/ns/prov#wasQuotedFrom	youtube.com