The pupil is a black opening in the eye that lets light enter the eye.
(The pupil; is; a black opening in the eye that lets light enter the eye) (a black opening in the eye; let s; light enter the eye) Context(a black opening in the eye let s,List([13, 49))):(light; enter; the eye)
a black opening in the eye let s,List([13, 49))
The pupil a black opening in the eye light
is let s enter
a black opening in the eye that lets light enter the eye
light enter the eye
the eye