Complex sentence: Best known for its Grasberg mine in Papua province, Indonesia, the company is the largest taxpayer to the Indonesian government; it mines and mills ores containing copper, gold, molybdenum and silver for the world market.
Split into simpler sentences: Best known for its Grasberg mine in Papua province, Indonesia, the company is the largest taxpayer to the Indonesian government. It mines and mills ores containing copper, gold, molybdenum and silver for the world market.