( ( ( The ( first ( metal mine ) ) ) ( in Canada ) ) ( ( ( started ( ( mining ( copper ore ) ) ( in 1850 ) ) ) ( at ( ( Bruce Mines ) ( on ( ( the ( north shore ) ) ( of ( Lake Huron ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ first) (NN metal) (NN mine)) (PP (IN in) (NP (NNP Canada)))) (VP (VBD started) (NP (NP (NN mining) (NN copper) (NN ore)) (PP (IN in) (NP (CD 1850)))) (PP (IN at) (NP (NP (NNP Bruce) (NNP Mines)) (PP (IN on) (NP (NP (DT the) (NN north) (NN shore)) (PP (IN of) (NP (NNP Lake) (NNP Huron)))))))) (. .)))
The first metal mine in Canada started mining copper ore in 1850 at Bruce Mines on the north shore of Lake Huron.
(ROOT (S (NP (NNS Metals)) (VP (VBP start) (PRT (RP out)) (PP (IN as) (NP (NN ore)))) (. .)))
Metals start out as ore.