The 1936 operetta "The Headless Horseman" was based on which 1820 story?

A 1930s study found that the water in Galesburg, Illinois, helped prevent tooth decay because it contained what? A 1935 film starring Peter Lorre adapted which Dostoyevsky classic? A 1936 dissent by Justice Harlan Stone accused six other justices of a "tortured construction" of which document? A 1936 fire in which city destroyed the prefabricated Crystal Palace? A 1937 article on the señoras of Mexico showed which artist as Mrs. Diego Rivera? A 1937 general strike in Trinidad is commemorated every June 19 as which holiday? A 1937 riding accident left which "Anything Goes" composer permanently disabled? A 1939 college baseball game was the first sports event shown on which medium?