sentence1_binary_parse: ( ( 243 ( underground ( metal ( and ( nonmetal mines ) ) ) ) ) ; )
sentence1_parse: (ROOT (S (VP (VBG 243) (NP (JJ underground) (NN metal) (CC and) (NN nonmetal) (NNS mines))) (: ;)))
sentence1: 243 underground metal and nonmetal mines;
sentence2_parse: (ROOT (S (PP (IN In) (NP (NP (DT a) (NN comparison)) (PP (IN of) (NP (NP (NNS metals)) (PP (TO to) (NP (NNS nonmetals))))))) (, ,) (NP (NNS metals)) (VP (VBP tend) (S (VP (TO to) (VP (VB have) (NP (NP (JJR greater) (NN conductivity)) (CC and) (NP (JJR higher) (NN melting) (NNS points))) (PP (IN than) (NP (NNS nonmetals))))))) (. .)))
sentence2: In a comparison of metals to nonmetals, metals tend to have greater conductivity and higher melting points than nonmetals.