About: http://webisa.webdatacommons.org/325023518

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	Foods that are high in oxalic acid, such as spinach, rhubarb, chard, and chocolate, can interfere with calcium absorption by forming insoluble salts in the gut.
http://www.w3.org/ns/prov#wasQuotedFrom	healthy.net