( This ( ( is ( ( one way ) ( of ( describing ( how ( ( electrical ( potential causes ) ) ( electrons ( to ( flow ( through ( the circuit ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ is) (NP (NP (CD one) (NN way)) (PP (IN of) (S (VP (VBG describing) (SBAR (WHADVP (WRB how)) (S (NP (JJ electrical) (JJ potential) (NNS causes)) (VP (VBZ electrons) (S (VP (TO to) (VP (VB flow) (PP (IN through) (NP (DT the) (NN circuit)))))))))))))) (. .)))
This is one way of describing how electrical potential causes electrons to flow through the circuit.
(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))))))