Glencore (Xetra: A1JAGV - news ) and Anglo American (LSE: AAL.L - news ) were the top fallers after Investec (LSE: INVP.L - news ) said the challenging environment for the sector calls into question the equity value of the mining companies.
Analyze the relationship between 'Glencore' and 'mining' within the context of the input sentence.
Options: industry, founded by, business division, subsidiary