Utilize the input text as a context reference, choose the right relationship between Walter Energy and coal 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.

Walter Energy Inc.’s senior-most creditors are entering confidential talks with the coal miner to reorganize it in bankruptcy court and hand ownership to the lenders, according to two people with direct knowledge of the matter.

Answer: product_or_material_produced