Utilize the input text as a context reference, choose the right relationship between OZ Minerals and copper 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.

OZ Minerals has maintained its full year production guidance of between 110,000 and 120,000 tonnes for copper and between 100,000 and 110,000 ounces for gold.

Answer: product_or_material_produced