What is the relationship between 'gold mine' and 'gold' in the context of the input sentence.
Options: distributed by, platform, product/material produced, headquarters location

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.
product/material produced