About: http://webisa.webdatacommons.org/4371562

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	Salt (you can trade for salt any items of your need with farmers, then farmers always need salt ??? salt is easy to store for several decades!) ??? I think, that salt is the most important of all!
http://www.w3.org/ns/prov#wasQuotedFrom	dailyreckoning.com.au