What is the relationship between Glencore and mining in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

LONDON-- Glencore PLC has swung to a first half-year net loss and warned of less buoyant marketing earnings this year, showing how sharp falls in raw-material prices have tested the group’s hybrid mining and commodities-trading business model.

Answer: industry