Utilize the input text as a context reference, choose the right relationship between 'Antofagasta Plc' and 'ANTOFAGASTA' from the options.
Options: location of formation, distribution format, director/manager, chief executive officer

* 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