some are hardier and more thickly furred--they manage in the cold nights to keep warm enough;
(they; manage; T:in the cold nights; to keep warm enough) Context(they manage,List([42, 53))):(some; are; hardier and more thickly furred)
they manage,List([42, 53))
they some
manage are
T:in the cold nights to keep warm enough
hardier and more thickly furred