About: http://webisa.webdatacommons.org/441937364

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	Nitrite and nitrate have widely varying background levels, which are influenced by a number of factors including diet.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk