( ( Many ( important ( metal ores ) ) ) ( ( are sulfides ) . ) )
(ROOT (S (NP (JJ Many) (JJ important) (NN metal) (NNS ores)) (VP (VBP are) (ADJP (JJ sulfides))) (. .)))
Many important metal ores are sulfides.
(ROOT (S (NP (NNS Metals)) (VP (VBP start) (PRT (RP out)) (PP (IN as) (NP (NN ore)))) (. .)))
Metals start out as ore.