The 6.28 million ounces of silver produced in the quarter puts South32 well ahead of the pace required to achieve full year guidance of 21.65 million ounces, but South32 cautioned that the strong performance was likely to be temporary.
Utilize the input text as a context reference, choose the right relationship between 'South32' and 'silver' from the options.
Options: director/manager, stock exchange, product/material produced, original broadcaster