( ( ( biceps and ) triceps ) ( ( are ( located ( on ( the arm ) ) ) ) . ) )
(ROOT (S (NP (NNS biceps) (CC and) (NNS triceps)) (VP (VBP are) (VP (VBN located) (PP (IN on) (NP (DT the) (NN arm))))) (. .)))
biceps and triceps are located on the arm.
(ROOT (S (NP (DT The) (NNS triceps)) (VP (VBP help) (S (NP (DT the) (NN body)) (VP (VB extend) (NP (DT the) (NN arm))))) (. .)))