( Metals ( ( ( conduct ( ( heat and ) electricity ) ) ( with ( ( the help ) ( of ( ( free electrons ) ( in them ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Metals)) (VP (VBP conduct) (NP (NN heat) (CC and) (NN electricity)) (PP (IN with) (NP (NP (DT the) (NN help)) (PP (IN of) (NP (NP (JJ free) (NNS electrons)) (PP (IN in) (NP (PRP them)))))))) (. .)))
Metals conduct heat and electricity with the help of free electrons in them.
(ROOT (S (NP (NNP Metal)) (VP (VBZ conducts) (NP (NP (NN heat) (CC and) (NN electricity)) (ADVP (RB so)) (PP (RB well) (RB because) (IN of) (NP (JJ free) (VBG flowing) (NNS electrons))))) (. .)))