Given the input sentence, please extract the subject and object containing a certain relation in the sentence according to the following relation types, in the format of "relation1: word1, word2; relation2: word3, word4". Relations include: 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.

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.

Answer: industry: Glencore, mining