( Must ( ( be ( ( a ( metal ore ) ) ( of ( some kind ) ) ) ) . ) )
(ROOT (S (INTJ (UH Must)) (VP (VB be) (NP (NP (DT a) (NN metal) (NN ore)) (PP (IN of) (NP (DT some) (NN kind))))) (. .)))
Must be a metal ore of some kind.
(ROOT (S (NP (NNS Metals)) (VP (VBP start) (PRT (RP out)) (PP (IN as) (NP (NN ore)))) (. .)))
Metals start out as ore.