Assertion: whale's migration | /r/HasProperty | long
Facets:
Source sentences:
text: In summer, they undergo long migrations between polar feeding grounds, while in winter, they frequent tropical or subtropical breeding grounds.
text: They undertake long migrations between polar feeding grounds in summer and tropical or subtropical breeding grounds in winter.
text: Humpback whales congregate in warm equatorial waters during the winter after their long migration from northern and southern Polar Regions.