( ( * Superconductor ) ( : ( ( ( ( A type ) ( of ( electrical conductor ) ) ) ( that ( permits ( a ( current ( to ( flow ( with ( zero resistance ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (FRAG (X (X (SYM *)) (NP (NNP Superconductor))) (: :) (NP (NP (DT A) (NN type)) (PP (IN of) (NP (JJ electrical) (NN conductor))) (SBAR (WHNP (WDT that)) (S (VP (VBZ permits) (NP (DT a) (NN current) (S (VP (TO to) (VP (VB flow) (PP (IN with) (NP (CD zero) (NN resistance))))))))))) (. .)))
* Superconductor: A type of electrical conductor that permits a current to flow with zero resistance.
(ROOT (S (NP (NNS Superconductors)) (VP (VBP are) (NP (NP (NNS materials)) (PP (IN with) (NP (NP (DT a) (NN resistivity)) (PP (IN of) (NP (CD zero))))))) (. .)))