Assertion: cave's passage | /r/CapableOf | open into room
Facets:
value: high
type: DEGREE
value: over 50 feet
type: OTHER
value: the next thing we knew
type: TEMPORAL
Source sentences:
text: The next thing we knew, the passage would open into rooms over 50 feet (15 m) high, with some of the most spectacular formations I’ve ever seen.