Which opera did this American composer and pianist whose Broadway show songs were included in The Passing Show of 1916 compose?
The Passing Show of 1916:  It included the first George Gershwin songs introduced in a Broadway show. George Gershwin: George Jacob Gershwin ( ; September 26, 1898 July 11, 1937) was an American composer and pianist. George Gershwin:  Among his best-known works are the orchestral compositions "Rhapsody in Blue" (1924) and "An American in Paris" (1928) as well as the opera "Porgy and Bess" (1935).
Porgy and Bess