( Supersetting ( ( triceps ( ( ( x and ) ( arm curls ) ) ( is not ) ) ) . ) )
(ROOT (S (NP (NNP Supersetting)) (VP (VBZ triceps) (SBAR (S (NP (NP (SYM x)) (CC and) (NP (NN arm) (NNS curls))) (VP (VBZ is) (RB not))))) (. .)))
Supersetting triceps x and arm curls is not.
(ROOT (S (NP (DT The) (NNS triceps)) (VP (VBP help) (S (NP (DT the) (NN body)) (VP (VB extend) (NP (DT the) (NN arm))))) (. .)))