( ( ( Stress Stress ) ( is generally ) ) ( , ( ( a force ) ( ( applied ( over ( ( an area ) ( of ( a solid ) ) ) ) ) . ) ) ) )
(ROOT (S (S (NP (NN Stress) (NN Stress)) (VP (VBZ is) (ADVP (RB generally)))) (, ,) (NP (DT a) (NN force)) (VP (VBD applied) (PP (IN over) (NP (NP (DT an) (NN area)) (PP (IN of) (NP (DT a) (JJ solid)))))) (. .)))
Stress Stress is generally, a force applied over an area of a solid.
(ROOT (S (NP (NP (DT The) (NN force)) (VP (VBN applied) (PP (TO to) (NP (DT an) (NN object))))) (VP (VBZ is) (VP (VBN called) (NP (NN stress)))) (. .)))