The layoffs come as the company is implementing a roughly 50 per cent drop in mining, stacking and crushing rates at the mine, in which Freeport owns a 51 per cent stake and Chilean state-owned copper giant Codelco has the remaining 49 per cent interest.
Refer to the input text as context and select the correct relationship between 'Codelco' and 'copper' from the available options.
Options: product/material produced, member of, publisher, position held