Assertion: sperm whale | /r/CapableOf | drop their heartbeat
Facets:
value: to three beats per minute
type: OTHER
value: to conserve oxygen
type: PURPOSE
Source sentences:
text: They can reach a depth of 2km (1.2 miles) for up to two hours, dropping their heartbeat to three beats per minute to conserve oxygen and minimise the risk of “the bends”.