original_query: What is the main theme of Daumier's lithograph "Rue Transnonain, 15 April"?
query: What is the main theme of Daumier's lithograph "Rue Transnonain, 15 April 1834"?
answer: The main theme of Daumier's lithograph "Rue Transnonain, 15 April 1834" depicts the massacre that occurred during the April 1834 riots in Paris.