( ( Aluminum Metal ) ( ( ( characterized ( by ( high resistance ) ) ) ( to ( ( ( ( corrosion , ) ( good ( electrical ( and ( thermal conductivity ) ) ) ) ) and ) ( ( a density ) ( which ( is ( about ( ( ( 1/3 or ) less ) ( of ( steel ( , ( ( copper or ) nickel ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Aluminum) (NNP Metal)) (VP (VBD characterized) (PP (IN by) (NP (JJ high) (NN resistance))) (PP (TO to) (NP (NP (NN corrosion)) (, ,) (NP (NN good) (JJ electrical) (CC and) (JJ thermal) (NN conductivity)) (CC and) (NP (NP (DT a) (NN density)) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (ADJP (IN about) (NP (NP (QP (CD 1/3) (CC or) (JJR less))) (PP (IN of) (NP (NN steel) (, ,) (NN copper) (CC or) (NN nickel)))))))))))) (. .)))
Aluminum Metal characterized by high resistance to corrosion, good electrical and thermal conductivity and a density which is about 1/3 or less of steel, copper or nickel.
(ROOT (S (NP (NN Copper)) (VP (VBZ conducts) (NP (NP (NN electricity)) (NP (DT the) (JJS best)))) (. .)))