( ( current ( by ( either ( ( ( completing or ) breaking ) ( the circuit ) ) ) ) ) ( ( 's pathway ) . ) )
(ROOT (S (NP (NP (JJ current)) (PP (IN by) (S (VP (CC either) (VBG completing) (CC or) (VBG breaking) (NP (DT the) (NN circuit)))))) (VP (VBZ 's) (ADJP (JJ pathway))) (. .)))
current by either completing or breaking the circuit's pathway.
(ROOT (NP (NP (NP (DT A) (JJ parallel) (NN circuit)) (VP (VBZ is) (VP (RBS best) (VBN described) (PP (IN as))))) (: :) (NP (NP (NN electricity) (NNS flows)) (PP (IN along) (NP (QP (JJR more) (IN than) (CD one)) (NN pathway))))))