( Devices ( ( ( called ( transformers ( use electromagnets ) ) ) ( to ( change ( ( the ( high-voltage electricity ) ) ( ( carried ( by ( power lines ) ) ) ( to ( ( the ( lower voltage ) ) ( needed ( in ( ( homes and ) businesses ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNPS Devices)) (VP (VBD called) (NP (JJ transformers) (NN use) (NNS electromagnets)) (S (VP (TO to) (VP (VB change) (NP (NP (DT the) (JJ high-voltage) (NN electricity)) (VP (VBN carried) (PP (IN by) (NP (NN power) (NNS lines))) (PP (TO to) (NP (NP (DT the) (JJR lower) (NN voltage)) (VP (VBN needed) (PP (IN in) (NP (NNS homes) (CC and) (NNS businesses)))))))))))) (. .)))
Devices called transformers use electromagnets to change the high-voltage electricity carried by power lines to the lower voltage needed in homes and businesses.
(ROOT (S (NP (DT A) (JJ electronic) (NN transformer)) (VP (VBZ uses) (NP (JJ electromagnetic) (NN induction) (S (VP (TO to) (VP (VB change) (NP (NP (DT the) (NN voltage)) (PP (IN of) (NP (JJ electric) (NN current))))))))) (. .)))