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.

OCEANAGOLD Corp expects 2015 production to increase while costs fall after the gold miner takes control of Waihi Gold Mine in New Zealand later this year.

Answer: product_or_material_produced