( ( ( The materials ) ( used ( in ( the ( cochlear implant ) ) ) ) ) ( also ( ( may ( activate ( metal ( detection systems ) ) ) ) . ) ) )
(ROOT (S (NP (NP (DT The) (NNS materials)) (VP (VBN used) (PP (IN in) (NP (DT the) (NN cochlear) (NN implant))))) (ADVP (RB also)) (VP (MD may) (VP (VB activate) (NP (NN metal) (NN detection) (NNS systems)))) (. .)))
The materials used in the cochlear implant also may activate metal detection systems.
(ROOT (S (NP (NNP Metal)) (VP (VBZ is) (ADVP (RB regularly)) (VP (VBN used) (PP (IN in) (NP (JJ human) (NN hip) (CC and) (NN knee) (NNS implants))))) (. .)))