( Work ( ( is ( ( defined simply ) ( as ( ( a force ) ( times ( ( the distance ) ( ( over which ) ( ( that force ) acts ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Work)) (VP (VBZ is) (VP (VBN defined) (ADVP (RB simply)) (PP (IN as) (NP (NP (DT a) (NN force)) (PP (CC times) (NP (NP (DT the) (NN distance)) (SBAR (WHPP (IN over) (WHNP (WDT which))) (S (NP (DT that) (NN force)) (VP (VBZ acts)))))))))) (. .)))
Work is defined simply as a force times the distance over which that force acts.
(ROOT (S (NP (NNP Force) (NNS times) (NN distance)) (VP (VBZ is) (NP (NP (DT the) (NN equation)) (PP (IN for) (NP (NN work))))) (. .)))