Assertion: penguin | /r/CapableOf | flap their flippers
Facets:
value: to overcome positive buoyancy
type: PURPOSE
value: during the initial descent
type: TEMPORAL
value: vigorously
type: MANNER
Source sentences:
text: A study on Adélie and king penguins showed that penguins can regulate their air intake before a dive, vigorously flap their flippers during the initial descent to overcome positive buoyancy, and then passively ascend from a dive using the expanding air volume in their body to conserve energy.