( 4d6There ( ( are ( groups ( of ( ( elements ( that ( have ( ( ( similar properties ) , ) ( including ( ( ( ( ( ( ( ( ( highly reactive ) metals ) , ) ( less-reactive metals ) ) , ) ( ( ( highly reactive ) nonmetals ) ( -LRB- ( ( such ( as ( ( ( ( ( chlorine , ) fluorine ) , ) and ) oxygen ) ) ) -RRB- ) ) ) ) , ) and ) ( some ( ( almost ( completely non-reactive ) ) gases ) ) ) ) ) ) ) ) ( -LRB- ( ( such ( as ( ( helium and ) neon ) ) ) -RRB- ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS 4d6There)) (VP (VBP are) (NP (NP (NNS groups)) (PP (IN of) (NP (NP (NNS elements)) (SBAR (WHNP (WDT that)) (S (VP (VBP have) (NP (NP (JJ similar) (NNS properties)) (, ,) (PP (VBG including) (NP (NP (ADJP (RB highly) (JJ reactive)) (NNS metals)) (, ,) (NP (JJ less-reactive) (NNS metals)) (, ,) (NP (NP (ADJP (RB highly) (JJ reactive)) (NNS nonmetals)) (PRN (-LRB- -LRB-) (PP (JJ such) (IN as) (NP (NP (NN chlorine)) (, ,) (NP (NN fluorine)) (, ,) (CC and) (NP (NN oxygen)))) (-RRB- -RRB-))) (, ,) (CC and) (NP (DT some) (ADJP (RB almost) (RB completely) (JJ non-reactive)) (NNS gases)))))))) (PRN (-LRB- -LRB-) (PP (JJ such) (IN as) (NP (NP (NNP helium)) (CC and) (NP (NN neon)))) (-RRB- -RRB-)))))) (. .)))
4d6There are groups of elements that have similar properties, including highly reactive metals, less-reactive metals, highly reactive nonmetals (such as chlorine, fluorine, and oxygen), and some almost completely non-reactive gases (such as helium and neon).
(ROOT (S (NP (NNS Nonmetals)) (VP (VBP have) (NP (NP (DT the) (JJS highest) (NN attraction)) (PP (IN for) (NP (NNS electrons))))) (. .)))