( ( ( ( Physical Science ) , ) ( ( ( Chemistry , ) and ) ( Physics 3.4 ) ) ) . )
(ROOT (NP (NP (NNP Physical) (NNP Science)) (, ,) (NP (NP (NNP Chemistry)) (, ,) (CC and) (NP (NNP Physics) (CD 3.4))) (. .)))
Physical Science, Chemistry, and Physics 3.4.
(ROOT (S (NP (NP (NNP Chemistry)) (CC and) (NP (NNS physics))) (VP (VBP are) (NP (NP (NNS fields)) (PP (IN in) (NP (JJ physical))))) (. .)))