Assertion: humpback whale's fin | /r/CapableOf | disappear by the time
Facets:
Source sentences:
text: The stubby dorsal fin is visible soon after the blow (exhalation) when the whale surfaces, but disappears by the time the flukes emerge.
text: The stubby dorsal fin is visible soon after the blow (exhalation) when the whale surfaces, but disappears by the time the flukes emerge.
text: The stubby dorsal fin is visible soon after the blow when the whale surfaces, but has disappeared by the time the flukes emerge.