( ( ( Alternator ( Electric ( ( generator or ) dynamo ) ) ) ( producing ( alternating ( ( current , ) ( which ( is ( ( an ( electric current ) ) ( that ( ( reverses ( its direction ) ) periodically ) ) ) ) ) ) ) ) ) . )
(ROOT (NP (NP (NNP Alternator) (NNP Electric) (NN generator) (CC or) (NN dynamo)) (VP (VBG producing) (S (VP (VBG alternating) (NP (NP (JJ current)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (NP (NP (DT an) (JJ electric) (NN current)) (SBAR (WHNP (WDT that)) (S (VP (VBZ reverses) (NP (PRP$ its) (NN direction)) (ADVP (RB periodically))))))))))))) (. .)))
Alternator Electric generator or dynamo producing alternating current , which is an electric current that reverses its direction periodically.
(ROOT (S (NP (VBG Alternating) (NN current)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (JJ electric) (NN current))) (SBAR (WHNP (WDT that)) (S (VP (VBZ keeps) (S (VP (VBG reversing) (NP (NN direction))))))))) (. .)))