In the context of the input sentence, determine the relationship between 'El Abra mine' and 'Freeport-McMoRan'.
Options: industry, chairperson, owned by, operator

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