Read the following premise and answer if the hypothesis is true.
George Jacob Gershwin ( ; September 26, 1898 July 11, 1937) was an American composer and pianist. Gershwin's compositions spanned both popular and classical genres, and his most popular melodies are widely known. 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).
Hypothesis: George Jacob Gershwin's "Porgy and Bess" wasn't one of his best-known compositions. . Is the answer "Yes", "No", or "It's impossible to say"? Respond with only the answer and no additional text.
No
It's impossible to say. The hypothesis is not clear enough to determine its truth value based on the given information. The premise states that "