( ( A capacitor ) ( ( is ( ( a device ) ( for ( storing ( separated charge ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN capacitor)) (VP (VBZ is) (NP (NP (DT a) (NN device)) (PP (IN for) (S (VP (VBG storing) (NP (ADJP (JJ separated)) (NN charge))))))) (. .)))
A capacitor is a device for storing separated charge.
(ROOT (S (NP (NNP Capacitors)) (VP (VBP are) (NP (NP (DT the) (NNS devices)) (VP (VBN placed) (PP (IN in) (NP (JJ electric) (NNS circuits))) (SBAR (WHADVP (WRB where)) (S (NP (NN charge)) (VP (MD can) (VP (VP (VB build) (PRT (RP up)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBP store) (NP (NN energy)) (SBAR (WHADVP (WRB when)) (S (VP (VBD charged)))))))) (CC and) (VP (VB release) (NP (PRP it)) (SBAR (WHADVP (WRB when)) (S (NP (PRP they)) (VP (VB discharge)))))))))))) (. .)))