( Since ( , ( work ( ( equals ( force ( times distance ) ) ) . ) ) ) )
(ROOT (S (PP (IN Since)) (, ,) (NP (NN work)) (VP (VBZ equals) (NP (NN force) (NNS times) (NN distance))) (. .)))
Since, work equals 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))))) (. .)))