( ( This science ) ( ( is ( ( a branch ) ( of ( both ( ( chemistry and ) biology ) ) ) ) ) ; ) )
(ROOT (S (NP (DT This) (NN science)) (VP (VBZ is) (NP (NP (DT a) (NN branch)) (PP (IN of) (NP (DT both) (NN chemistry) (CC and) (NN biology))))) (: ;)))
This science is a branch of both chemistry and biology;
(ROOT (S (NP (NNP Chemistry)) (VP (VBZ is) (VP (VBN defined) (PP (IN as) (NP (NP (DT the) (NN study)) (PP (IN of) (NP (NN matter))))))) (. .)))