( Not ( only ( ( ( are ( nerve fibres ) ) ( branching ( into ( ( the organs ) ( of ( ( ( ( ( ( ( ( ( the ( immune system ) ) , ) thymus ) , ) ( lymph glands ) ) , ) ( bone marrow ) ) and ) spleen ) ) ) ) ) ) . ) ) )
(ROOT (SINV (RB Not) (ADVP (RB only)) (VP (VBP are)) (NP (NN nerve) (NNS fibres)) (S (VP (VBG branching) (PP (IN into) (NP (NP (DT the) (NNS organs)) (PP (IN of) (NP (NP (DT the) (JJ immune) (NN system)) (, ,) (NP (NNS thymus)) (, ,) (NP (NN lymph) (NNS glands)) (, ,) (NP (NN bone) (NN marrow)) (CC and) (NP (NN spleen)))))))) (. .)))
Not only are nerve fibres branching into the organs of the immune system, thymus, lymph glands, bone marrow and spleen.
(ROOT (S (NP (DT Each) (NN lymph) (NN organ)) (VP (VBZ has) (NP (NP (DT a) (JJ different) (NN job)) (PP (IN in) (NP (DT the) (JJ immune) (NN system))))) (. .)))