Refer to the input text as context and select the correct relationship between 'Glencore' and 'mining' from the available options.
Options: industry, subsidiary, brand, publisher

In fact, while Lookers and Pendragon are very much worth buying at the present time, the mining sector looks massively undervalued and, as such, the likes of Rio Tinto and Glencore appear to be better options for long term investors.
industry