Assertion: lignite | /r/CapableOf | ignite under appropriate conditions
Facets:
value: spontaneously
type: MANNER
Source sentences:
text: To give a sense of the effects of increasing rank, the following comparison may be used: lignite is soft, dusty, and can ignite spontaneously under the appropriate conditions, whereas anthracite is quite hard, clean to the touch, and must reach a temperature of about 925°F before it will ignite.