Utilize the input text as a context reference, choose the right relationship between Altria and tobacco 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.

The most significant news was that SABMiller's largest shareholder Altria Group, which is a holding company for tobacco companies such as Marlboro, had apparently been approached by ABI in the week before the bid proposal was released.

Answer: product_or_material_produced