Mining stocks were mostly lower, with heavyweights BHP Billiton (NYSE: BBL - news ) , Anglo American (LSE: AAL.L - news ) , Rio Tinto (LSE: RIO.L - news ) and Glencore (Xetra: A1JAGV - news ) all trading lower, as metal prices dipped across the board and copper suffered in particular.
What is the relationship between 'Glencore' and 'Mining' in the context of the input sentence.
Options: business division, location of formation, owned by, industry