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