Many of those who study mammals and birds at play have concluded that animals play as a way of helping them learn how to adapt to a constantly changing environment.
(those; study; mammals and birds; L:at play) (Many of those; have concluded; that animals play as a way of helping them learn how to adapt to a constantly changing environment) Context(Many of those have concluded,List([0, 64))):(animals; play; )
Many of those have concluded,List([0, 64))
those Many of those animals
study have concluded play
mammals and birds L:at play
that animals play as a way of helping them learn how to adapt to a constantly changing environment