Utilize the input text as a context reference, choose the right relationship between bus manufacturing and bus 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.

We’re very, very good and particularly good in bus design and bus manufacturing and architecture.

Answer: product_or_material_produced