Original sentence: Initially joined Blackstone to manage an investment fund and provide advice to financial institutions as well as use a Blackstone fund to invest in financial institutions.The two founders, who each had run the mortgage backed securities division at First Boston and Lehman Brothers Kuhn Loeb, respectively.to help those individuals build an asset management business specializing in fixed income investments
Edited sentence: The two founders, who had previously run the mortgage backed securities divisions at First Boston and Lehman Brothers Kuhn Loeb respectively, initially joined Blackstone to manage an investment fund and provide advice to financial institutions.They also planned to use a Blackstone fund to invest in financial institutions and help build an asset management business specializing in fixed income investments