About: http://webisa.webdatacommons.org/170589343

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	The kidneys and urinary system keep chemicals, such as potassium and sodium, and water in balance by removing a type of waste, called urea, from the blood.
http://www.w3.org/ns/prov#wasQuotedFrom	childrensnational.org