animals active during the daytime are "diurnal," those active at night are "nocturnal."
(those active at night; are; nocturnal) Context(those active at night are,List([49, 74))):(animals active during the daytime; are; diurnal)
those active at night are,List([49, 74))
those active at night animals active during the daytime
are are
nocturnal
diurnal