Refer to the input text as context and select the correct relationship between 'THORNTONS' and 'chocolate' from the available options.
Options: owner of, product/material produced, member of, employer

THORNTONS - An offer by Nutella spread maker Ferrero to buy out investors in British chocolate retailer Thorntons has reached a take-up of nearly 75 percent, the head of the Italian confectionery group was Quote: d as saying.
product/material produced