What is the relationship between Lehman Brothers and investment bank 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.

The civil charges against the veteran money manager, his son and their investment company come eight months after the Reserve Primary Fund, loaded with Lehman Brothers debt, halted redemptions after the investment bank declared bankruptcy, sparking a run on money-market funds.

Answer: product_or_material_produced