Assertion: vegetable oil's use | /r/CapableOf | become expensive
Facets:
value: near urban centers
type: LOCATION
value: increasingly
type: DEGREE
Source sentences:
text: The technique became increasingly popular in the late Ming dynasty (1368–1644), in part because the wood and charcoal used to fire stoves were becoming increasingly expensive near urban centers, and stir-frying could cook food quickly without wasting fuel.