Assertion: salt | /r/HasProperty | transported by boat
Facets:
value: across the mediterranean sea
type: LOCATION
value: on camel caravans
type: LOCATION
value: along specially built salt roads
type: LOCATION
Source sentences:
text: Salt became an important article of trade and was transported by boat across the Mediterranean Sea, along specially built salt roads, and across the Sahara on camel caravans.