With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Smith's career was cut short by the Great Depression, which nearly put the recording industry out of business, and the advent of sound in film, which spelled the end of vaudeville. She hardly stopped performing, however. The days of elaborate vaudeville shows were over, but Smith continued touring and occasionally sang in clubs. In 1929, she appeared in a Broadway musical, "Pansy". The play was a flop; top critics said she was its only asset.
text_B: Did films with sound end Vaudeville?
YES.