( Light ( ( ( enters ( the eye ) ) ( through ( ( a hole ) ( called ( the pupil ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Light)) (VP (VBZ enters) (NP (DT the) (NN eye)) (PP (IN through) (NP (NP (DT a) (NN hole)) (VP (VBN called) (NP (DT the) (NN pupil)))))) (. .)))
Light enters the eye through a hole called the pupil .
(ROOT (S (NP (DT The) (NN pupil)) (VP (VBZ is) (NP (NP (DT the) (NN name)) (PP (IN of) (NP (NP (DT the) (JJ black) (NN opening)) (PP (IN in) (NP (NP (DT the) (NN eye)) (SBAR (WHNP (WDT that)) (S (VP (VBZ lets) (SBAR (S (NP (NN light)) (VP (VBP enter))))))))))))) (. .)))