( So ( ( ( the ( first organs ) ) ( that ( are gone ) ) ) ( ( are ( ( ( the eyes ) and ) ( the brain ) ) ) . ) ) )
(ROOT (S (IN So) (NP (NP (DT the) (JJ first) (NNS organs)) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (VP (VBN gone)))))) (VP (VBP are) (NP (NP (DT the) (NNS eyes)) (CC and) (NP (DT the) (NN brain)))) (. .)))
So the first organs that are gone are the eyes and the brain.
(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)))))))))) (. .)))