( ( ( The formula ) ( for ( carbon dioxide ) ) ) ( ( is ( CO 2 ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN formula)) (PP (IN for) (NP (NN carbon) (NN dioxide)))) (VP (VBZ is) (NP (NNP CO) (CD 2))) (. .)))
The formula for carbon dioxide is CO 2 .
(ROOT (S (NP (NNP Co) (CD 2)) (VP (VBZ is) (NP (NP (DT the) (JJ molecular) (NN formula)) (PP (IN of) (NP (NN carbon) (NN dioxide))))) (. .)))