About: http://webisa.webdatacommons.org/235124456

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	At the same time it should be noted that in some leafy vegetables such as spinach and kale, contain a lot of oxalic acid which binds calcium and thus prevents its absorption.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com