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

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