The iron-ore mine at Millom, on the coast southwest of Broughton-in-Furness, was once one of the biggest in the world.
The iron-ore mine in Millom was the largest in the world until now.
mnli hypothesis: The iron-ore mine in Millom was the largest in the world until now. premise: The iron-ore mine at Millom, on the coast southwest of Broughton-in-Furness, was once one of the biggest in the world.