( Work ( ( is ( force ( times distance ) ) ) . ) )
(ROOT (S (NP (NNP Work)) (VP (VBZ is) (NP (NN force) (NNS times) (NN distance))) (. .)))
Work is force times distance.
(ROOT (S (NP (NNP Force) (NNS times) (NN distance)) (VP (VBZ is) (NP (NP (DT the) (NN equation)) (PP (IN for) (NP (NN work))))) (. .)))