About: http://webisa.webdatacommons.org/267401511

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	In addition, they may be contaminated with toxic, heavy metals, such as lead or mercury, and minerals that are harmful to CKD patients, like potassium.
http://www.w3.org/ns/prov#wasQuotedFrom	blog4safety.com