What is the relationship between gold mine and gold 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.

Bottom of the cycle Rival gold miner Evolution Mining is also finding opportunities at the bottom of the cycle, recently picking up the Cowal gold mine from Barrick Gold for $550 million as well as a deal to acquire La Mancha's Australian assets.

Answer: product_or_material_produced