( ( and ( ( metal ore ) ( -LRB- ( ( 7.8 % ) -RRB- ) ) ) ) . )
(ROOT (S (VP (VB and) (NP (NP (NN metal) (NN ore)) (PRN (-LRB- -LRB-) (NP (CD 7.8) (NN %)) (-RRB- -RRB-)))) (. .)))
and metal ore (7.8%).
(ROOT (S (NP (NNS Metals)) (VP (VBP start) (PRT (RP out)) (PP (IN as) (NP (NN ore)))) (. .)))
Metals start out as ore.