Assertion: lubricant's oil | /r/ObjectUse | used as cheap fuel
Facets:
value: in the early to mid-20th century
type: TEMPORAL
value: for tractors
type: TRANSITIVE-OBJECT
Source sentences:
text: In the early to mid-20th century, kerosene or tractor vaporising oil (TVO) was used as a cheap fuel for tractors and hit 'n miss engines