The pupil is the black circular hole in the center of the iris, and it lets light enter the eye.
(The pupil; is; the black circular hole in the center of the iris) (it; let s; light enter the eye) Context(it let s,List([68, 75))):(light; enter; the eye)
it let s,List([68, 75))
The pupil it light
is let s enter
the black circular hole in the center of the iris
light enter the eye
the eye