Assertion: mercury | /r/HasProperty | emitted
Facets:
value: from volcanoes
type: LOCATION
value: from burning coal
type: OTHER
Source sentences:
text: It is emitted from burning coal and waste, and from volcanoes.
text: Coal contains mercury and other hazardous air pollutants that are emitted when the coal is burned incoal-fired power plants, industrial boilers and household stoves.