( Copper ( ( ( does n't ) ( conduct electricity ) ) . ) )
(ROOT (S (NP (NN Copper)) (VP (VBZ does) (RB n't) (VP (VB conduct) (NP (NN electricity)))) (. .)))
Copper doesn't conduct electricity.
(ROOT (S (NP (NN Copper)) (VP (VBZ conducts) (NP (NP (NN electricity)) (NP (DT the) (JJS best)))) (. .)))