( ( ( ( Classify ( ( ( an element ) ( as ( either ( ( ( a metal ) or ) ( a nonmetal ) ) ) ) ) ( -LRB- ( or ( ( ( an inert ) gas ) -RRB- ) ) ) ) ) ( from ( its position ) ) ) ( on ( the ( periodic table ) ) ) ) . )
(ROOT (S (VP (VB Classify) (NP (NP (DT an) (NN element)) (PP (IN as) (NP (CC either) (NP (DT a) (NN metal)) (CC or) (NP (DT a) (NN nonmetal)))) (PRN (-LRB- -LRB-) (CC or) (NP (NP (DT an) (NN inert)) (NP (NN gas))) (-RRB- -RRB-))) (PP (IN from) (NP (PRP$ its) (NN position))) (PP (IN on) (NP (DT the) (JJ periodic) (NN table)))) (. .)))
Classify an element as either a metal or a nonmetal (or an inert gas) from its position on the periodic table.
(ROOT (S (NP (NP (NNS Elements)) (PP (IN on) (NP (NP (DT the) (JJ periodic) (NN table)) (PP (IN of) (NP (DT the) (NNS elements)))))) (VP (VBP are) (VP (VBN classified) (PP (IN into) (NP (NP (NNS categories)) (PP (JJ such) (IN as) (NP (NNS metals) (CC and) (NNS nonmetals))))))) (. .)))
Elements on the periodic table of the elements are classified into categories such as metals and nonmetals.