( ( INSULATOR ( ( A material ) ( which ( ( has ( a ( high resistance ) ) ) ( to ( ( the flow ) ( of ( electric current ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB INSULATOR) (NP (NP (DT A) (NN material)) (SBAR (WHNP (WDT which)) (S (VP (VBZ has) (NP (DT a) (JJ high) (NN resistance)) (PP (TO to) (NP (NP (DT the) (NN flow)) (PP (IN of) (NP (JJ electric) (NN current)))))))))) (. .)))
INSULATOR A material which has a high resistance to the flow of electric current.
(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)))))))) (. .)))