Refer to the input text as context and select the correct relationship between 'Starbucks' and 'coffee' from the available options.
Options: original broadcaster, headquarters location, owner of, product/material produced

Hamish Smith, a commodities economist with Capital Economics in London, said in an interview that a company like Starbucks "can't afford to be in a position where it will run out of coffee or will suddenly have to pay an unexpectedly high price for it".
product/material produced