Utilize the input text as a context reference, choose the right relationship between KPMG and audit 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 thank KPMG for their strong contribution as the company's auditors over many years and for the current year,” said Peter Smith, chairman of the audit committee.

Answer: product_or_material_produced