Mining groups BHP Billiton (NYSE: BBL - news ) , Glencore (Xetra: A1JAGV - news ) , Antofagasta (Other OTC: ANFGF - news ) and Rio Tinto (LSE: RIO.L - news ) were down between 2.3 and 4.7 percent.
Refer to the input text as context and select the correct relationship between 'Glencore' and 'Mining' from the available options.
Options: employer, publisher, manufacturer, industry