Utilize the input text as a context reference, choose the right relationship between gold mine and Gold from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Barrick Gold this year sold its Cowal gold mine to Evolution Mining , while Rio Tinto, Peabody Energy, Vale and Anglo American are looking to sell or exit their coal portfolios in Australia.

Answer: product_or_material_produced