Analyze the relationship between 'Starbucks' and 'coffee' within the context of the input sentence.
Options: distribution format, chief executive officer, position held, product/material produced

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