( ( Ore ( ( from which ) ( ( a metal ) ( is derived ) ) ) ) ; )
(ROOT (NP (NP (NP (NNP Ore)) (SBAR (WHPP (IN from) (WHNP (WDT which))) (S (NP (DT a) (NN metal)) (VP (VBZ is) (VP (VBN derived)))))) (: ;)))
Ore from which a metal is derived;
(ROOT (S (NP (NNS Metals)) (VP (VBP start) (PRT (RP out)) (PP (IN as) (NP (NN ore)))) (. .)))
Metals start out as ore.