Utilize the input text as a context reference, choose the right relationship between coffee roaster and coffee 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.

Aug 31 German coffee roaster Tchibo lowered its retail prices for the first time in nearly two years on Monday, becoming the latest company to walk back recent price hikes amid tumbling green coffee prices as fears of drought in top-grower Brazil wane.

Answer: product_or_material_produced