( ( Electric ( insulation materials ) ) . )
(ROOT (NP (NP (NNP Electric)) (NP (NN insulation) (NNS materials)) (. .)))
Electric insulation materials.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (NNS materials)) (SBAR (WHNP (WDT that)) (S (VP (VBP have) (NP (JJ high) (NN resistance)) (PP (TO to) (NP (JJ electric) (JJ current) (JJ electric) (NNS insulators)))))))) (. .)))