( ( ( The ( main components ) ) ( in ( the ( exposure water ) ) ) ) ( ( were ( ( toluene and ) xylenes ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ main) (NNS components)) (PP (IN in) (NP (DT the) (NN exposure) (NN water)))) (VP (VBD were) (ADJP (JJ toluene) (CC and) (JJ xylenes))) (. .)))
The main components in the exposure water were toluene and xylenes.
(ROOT (S (NP (NNP Water)) (VP (VBZ is) (NP (NP (DT the) (JJ main) (NN component)) (PP (IN of) (NP (NN milk))))) (. .)))