In the context of the input sentence, determine the relationship between 'Glencore' and 'Mining'.
Options: industry, stock exchange, product/material produced, manufacturer

Mining stocks were mostly lower as risk appetite waned, with heavyweights BHP Billiton (NYSE: BBL - news ) , Glencore (Xetra: A1JAGV - news ) and Anglo American (LSE: AAL.L - news ) all registering falls.
industry