What is the relationship between 'KPMG' and 'audit' in the context of the input sentence.
Options: stock exchange, publisher, product/material produced, chairperson

Barclays (LSE: BARC.L - news ) ' audit generated £35m in statutory fees and £10m for other work for PwC last year, although last week Barclays hired KPMG for future audits.
product/material produced