sentence1_binary_parse: ( ( Metallic bonding ) ( ( refers ( to ( ( the ( specific bonding ) ) ( between ( ( ( positive ( metal ions ) ) and ) ( surrounding ( valence ( electron clouds ) ) ) ) ) ) ) ) . ) )
sentence1_parse: (ROOT (S (NP (NNP Metallic) (NNP bonding)) (VP (VBZ refers) (PP (TO to) (NP (NP (DT the) (JJ specific) (NN bonding)) (PP (IN between) (NP (NP (JJ positive) (NN metal) (NNS ions)) (CC and) (NP (VBG surrounding) (NN valence) (NN electron) (NNS clouds))))))) (. .)))
sentence1: Metallic bonding refers to the specific bonding between positive metal ions and surrounding valence electron clouds.
sentence2_parse: (ROOT (S (NP (NP (DT The) (NN force)) (PP (IN of) (NP (NP (NN attraction)) (PP (IN between) (NP (NP (DT a) (ADJP (ADVP (RB positively)) (VBN charged)) (NN metal) (NN ion)) (CC and) (NP (NP (DT the) (JJ valence) (NNS electrons)) (SBAR (S (NP (PRP it)) (VP (VBZ shares) (PP (IN with) (NP (NP (JJ other) (NNS ions)) (PP (IN of) (NP (DT the) (NN metal)))))))))))))) (VP (VBZ is) (VP (VBN called) (S (NP (DT a) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (NN metallic) (NN bond))))) (. .)))
sentence2: The force of attraction between a positively charged metal ion and the valence electrons it shares with other ions of the metal is called a(n) metallic bond.