( ( Part ( of brain ) ) ( that ( ( Allows animals ) ( to see ) ) ) )
(ROOT (FRAG (NP (NP (NN Part)) (PP (IN of) (NP (NN brain)))) (SBAR (IN that) (S (NP (NNP Allows) (NNS animals)) (VP (TO to) (VP (VB see)))))))
Part of brain that Allows animals to see
(ROOT (S (NP (NNS Brain) (CC and) (NNS eyes)) (VP (VBP are) (S (NP (DT the) (NNS organs)) (VP (VB work) (PRT (RP together)) (S (VP (TO to) (VP (VB allow) (S (NP (PRP us)) (VP (TO to) (VP (VB see)))))))))) (. .)))