Assertion: caldera | /r/MadeOf | the collapse of a volcano
Facets:
value: into itself
type: OTHER
Source sentences:
text: A caldera is a volcanic feature formed by the collapse of a volcano into itself, making it a large, special form of volcanic crater.
text: A caldera is a volcanic feature formed by the collapse of a volcano into itself, making it a large, special form of volcanic crater.
text: A caldera is a volcanic feature formed by the collapse of a volcano into itself, making it a large, special form of volcanic crater.