What is the relationship between Weir Group and London Stock Exchange 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.

204.60p +0.44% London Stock Exchange Group (LSE) 2,617.00p +0.42% Sage Group (LSE: SGE.L - news ) (SGE) 524.50p +0.38% FTSE 100 - Fallers Glencore (GLEN) 161.70p -8.18% Weir Group (WEIR) 1,371.00p -3.79% Rolls-Royce Holdings (RR.)

Answer: stock_exchange