( ( relationship ( of ( ( ( ( ( pressure , ) area ) , ) and ) force ) ) ) ; )
(ROOT (NP (NP (NN relationship)) (PP (IN of) (NP (NP (NN pressure)) (, ,) (NP (NN area)) (, ,) (CC and) (NP (NN force)))) (: ;)))
relationship of pressure, area, and force;
(ROOT (S (NP (NN Pressure)) (VP (VBZ is) (VP (VBN defined) (PP (IN in) (NP (NN physics))) (PP (IN as) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NP (NN force)) (VP (VBG pushing) (PP (IN against) (NP (DT a) (VBN given) (NN area)))))))))) (. .)))