( They ( ( 're ( allowing ( us ( to ( see ( ( the ( living ( , ( thinking ( , ( feeling ( , ( human brain ) ) ) ) ) ) ) ) ( at work ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP 're) (VP (VBG allowing) (S (NP (PRP us)) (VP (TO to) (VP (VB see) (NP (NP (DT the) (VBG living) (, ,) (VBG thinking) (, ,) (NN feeling) (, ,) (JJ human) (NN brain)) (PP (IN at) (NP (NN work))))))))) (. .)))
They're allowing us to see the living, thinking, feeling, human brain at work.
(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)))))))))) (. .)))