From birth a bird is a bird and has in its body complex instincts which allow it to migrate and to build a nest at the proper season.
(a bird; is; a bird) (a bird; has; L:in its body complex instincts) (it; to to build; a nest; L:at the proper season) (its body complex instincts; allow; it to migrate and to build a nest at the proper season) Context(its body complex instincts allow,List([39, 77))):(it; to migrate; )
its body complex instincts allow,List([39, 77))
a bird a bird it its body complex instincts it
is has to to build allow to migrate
a bird
L:in its body complex instincts
a nest L:at the proper season
it to migrate and to build a nest at the proper season