Refer to the input text as context and select the correct relationship between 'El Abra mine' and 'copper' from the available options.
Options: distribution format, product/material produced, manufacturer, location of formation

SANTIAGO Aug 31 A Chilean union that represents copper mine workers on Monday rejected a move to drastically cut staff at the El Abra mine owned by Freeport-McMoRan and was considering action after 700 workers had their jobs terminated at the weekend.
product/material produced