( ( The ( Green ( Bay/Fox ( River ( Mass ( Balance Model ) ) ) ) ) ) ( ( is ( a ( tool ( to ( be used ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP Green) (NNP Bay/Fox) (NNP River) (NNP Mass) (NNP Balance) (NNP Model)) (VP (VBZ is) (NP (DT a) (NN tool) (S (VP (TO to) (VP (VB be) (VP (VBN used))))))) (. .)))
The Green Bay/Fox River Mass Balance Model is a tool to be used.
(ROOT (S (NP (DT A) (NN student)) (VP (MD should) (VP (VB use) (NP (DT a) (NN balance) (S (VP (TO to) (VP (VB compare) (NP (NP (DT the) (NNS masses)) (PP (IN of) (NP (CD two) (JJ small) (NNS rocks)))))))))) (. .)))