( ( Recall ( that ( work ( is ( defined ( as ( ( the product ) ( of ( force ( times distance ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Recall) (SBAR (IN that) (S (NP (NN work)) (VP (VBZ is) (VP (VBN defined) (PP (IN as) (NP (NP (DT the) (NN product)) (PP (IN of) (NP (NN force) (NNS times) (NN distance)))))))))) (. .)))
Recall that work is defined as the product of 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))))) (. .)))