In the context of the input sentence, determine the relationship between 'El Abra mine' and 'Freeport-McMoRan'.
Options: product/material produced, employer, founded by, operator

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.
operator