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.

Mid-cap gold mining stocks nosedived, with Centamin (Toronto: CEE.TO - news ) falling 9.1pc to 53.6p, Lonmin (LSE: LMI.L - news ) 4.2pc off at 77.7p and Acacia Mining (Other OTC: ABGLF - news ) edging 13.7pc lower to 239p.

Answer: industry: Lonmin, mining