( ( ( Another ( important characteristic ) ) ( of ceramics ) ) ( ( is ( ( ( their ( high ( electrical resistance ) ) ) , ) ( necessary ( for ( materials ( ( ( used ( in ( high-voltage insulators ) ) ) and ) ( spark plugs ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT Another) (JJ important) (NN characteristic)) (PP (IN of) (NP (NNS ceramics)))) (VP (VBZ is) (NP (NP (PRP$ their) (JJ high) (JJ electrical) (NN resistance)) (, ,) (ADJP (JJ necessary) (PP (IN for) (NP (NP (NNS materials)) (VP (VP (VBN used) (PP (IN in) (NP (JJ high-voltage) (NNS insulators)))) (CC and) (VP (VB spark) (NP (NNS plugs))))))))) (. .)))
Another important characteristic of ceramics is their high electrical resistance, necessary for materials used in high-voltage insulators and spark plugs.
(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)))))))) (. .)))