* ANTOFAGASTA : Barrick Gold Corp agreed on Thursday to sell 50 percent of its Zaldivar copper mine in Chile to copper miner Antofagasta Plc for $1 billion in cash, and both parties stressed that this was just the start of more cooperation.
In the context of the input sentence, determine the relationship between 'Antofagasta Plc' and 'ANTOFAGASTA'.
Options: distribution format, director/manager, chief executive officer, location of formation