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.
Take context from the input text and decide on the accurate relationship between 'South32' and 'silver' from the options provided.
Options: original broadcaster, product/material produced, stock exchange, director/manager