( ( The lead ) ( ( is ( a ( flexible ( insulated ( electrical wire ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN lead)) (VP (VBZ is) (NP (DT a) (JJ flexible) (JJ insulated) (JJ electrical) (NN wire))) (. .)))
The lead is a flexible insulated electrical wire.
(ROOT (S (NP (JJ Electrical) (NNS wires)) (VP (VBP are) (ADVP (RB usually)) (VP (VBN covered) (PP (IN with) (NP (NN plastic) (CC or) (NN rubber))) (S (VP (TO to) (VP (VB insulate) (NP (DT the) (JJ electrical) (NN wire))))))) (. .)))
Electrical wires are usually covered with plastic or rubber to insulate the electrical wire.