Utilize the input text as a context reference, choose the right relationship between Ambatovy mine and nickel 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.

In the meantime, the flagship Ambatovy mine has been hit by strikes and Sherritt's Pathe said nickel prices at about $5 per pound make it hard to break even.

Answer: product_or_material_produced