Tell me if this is incorrect, that there were negotiations going on with Codelco about maybe making some changes to the long-term contract that you have with them in respect of how the royalty is calculated to maybe give you some better predictability of what happens under highly volatile copper prices.
Refer to the input text as context and select the correct relationship between 'Codelco' and 'copper' from the available options.
Options: employer, product/material produced, position held, original broadcaster