Assertion: kerosene | /r/HasProperty | produced
Facets:
value: from coal tar
type: LOCATION
value: from shale oils
type: LOCATION
value: by heating the rock
type: MANNER
Source sentences:
text: Kerosene was also produced during the same period from oil shale and bitumen by heating the rock to extract the oil, which was then distilled.
text: Discovered by Canadian physician Abraham Gesner in the late 1840s, kerosene was initially manufactured from coal tar and shale oils.