Assertion: caldera | /r/MadeOf | the collapse of land surface
Facets:
value: after a gigantic volcanic eruption
type: TEMPORAL
Source sentences:
text: A caldera is a volcanic feature formed by the collapse of land surface after a gigantic volcanic eruption.
text: A caldera is a volcanic feature formed by the collapse of land surface after a gigantic volcanic eruption.
text: A caldera is a volcanic feature formed by the collapse of land surface after a gigantic volcanic eruption.