Refer to the input text as context and select the correct relationship between 'Starbucks' and 'coffee' from the available options.
Options: chief executive officer, position held, product/material produced, distribution format

Sept 24 Starbucks Corp, the world's biggest coffee chain, promised to raise the average wage for its UK staff to just under 8 pounds ($12.18) an hour from November regardless of age, the Financial Times reported.
product/material produced