( classification ( of ( elements ( as ( metals ( , ( metalloids ( , ( and nonmetals ) ) ) ) ) ) ) ) )
(ROOT (NP (NP (NN classification)) (PP (IN of) (NP (NP (NNS elements)) (PP (IN as) (NP (NNS metals) (, ,) (NNS metalloids) (, ,) (CC and) (NNS nonmetals)))))))
classification of elements as metals, metalloids, and nonmetals
(ROOT (S (NP (NNS Nonmetals)) (VP (VBP have) (NP (NP (DT the) (JJS highest) (NN attraction)) (PP (IN for) (NP (NNS electrons))))) (. .)))