What is the relationship between Codelco and SANTIAGO in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

SANTIAGO Aug 3 Chile state miner Codelco said it would facilitate talks between striking contract workers and their employers, as a stoppage that has shuttered its smallest mine and affected others looked set to stretch into a third week.

Answer: headquarters_location