What is the relationship between Niki Lauda and Mercedes 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.

** Mercedes F1 non-executive chairman Niki Lauda has dismissed a report suggesting Formula One rival Red Bull could switch from Renault to Mercedes engines with Aston Martin branding.

Answer: employer