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. (WLTGQ), with its restructuring deal in pieces, pleaded with a reluctant bankruptcy judge Thursday for a new cash order that would appease its lenders and grant the coal company 30 days to reset.

Answer: product_or_material_produced