Assertion: caldera | /r/MadeOf | hot springs
Facets:
Source sentences:
text: This lake is approximately 2,000 metres (6,600 ft) above sea level and estimated to be about 200 metres (660 ft) deep; the caldera also contains hot springs.
text: The caldera does contain many hot springs, and geysers, some of which are hot enough to boil water.