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

* 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.
location of formation