Original sentence: However, the firm's fortunes began to fade following World War II, when it failed to keep pace with a rapidly changing investment banking industry, where Kuhn, Loeb's old-world, genteel ways, did not seem to fit; the days of the gentleman-banker had passed
Edited sentence: However, the firm's fortunes began to fade following World War II, when it failed to keep pace with a rapidly changing investment banking industry, where Kuhn, Loeb's old-world, genteel ways, did not seem to fit