Refer to the input text as context and select the correct relationship between 'El Abra mine' and 'Freeport-McMoRan' from the available options.
Options: chairperson, industry, operator, owned by

SANTIAGO Aug 31 (Reuters) - A Chilean union that represents copper mine workers rejected a move by Freeport-McMoRan Inc to drastically cut staff at its El Abra mine and said on Monday it was considering action.
operator