Commodities trader and mining giant Glencore PLC GLEN, -29.42% GLCNF, -27.70% sank 29% after Investec analysts suggested in a report that the company’s equity value could evaporate against its large debt pile unless commodity prices improve or the company launches a substantial restructuring.
Analyze the relationship between 'Glencore' and 'mining' within the context of the input sentence.
Options: member of, brand, industry, operator