A dead mouse was put in with it, but the owl never knew it was there.
(A dead mouse; was put in; with it) (the owl; never knew; it was there) Context(the owl never knew,List([37, 55))):(it; was; there)
the owl never knew,List([37, 55))
A dead mouse the owl it
was put in never knew was
with it
it was there
there