What is the relationship between Stifel and broker 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.

KBW LLC, a Stifel company, operates in the U.S. and Europe through its broker dealer subsidiaries, Keefe, Bruyette & Woods, Inc. and Stifel Nicolaus Europe Limited ("SNEL"), also trading as Keefe, Bruyette & Woods Europe ("KBW Europe").

Answer: product_or_material_produced