Mining stocks trimmed earlier losses but still finished lower with heavyweights BHP Billiton (NYSE: BBL - news ) , Glencore (Xetra: A1JAGV - news ) and Anglo American (LSE: AAL.L - news ) ending in the red.
What is the relationship between 'Glencore' and 'Mining' in the context of the input sentence.
Options: manufacturer, chief executive officer, industry, subsidiary