Title: Napoleon.
Question: When were the diaries of Napoleon's valet published?

Title: Frederic Chopin.
Question: What did Parisian ladies consider proper etiquette when in Chopin's room?

Title: Daylight saving time.
Question: What organization predicted a $100 million increase for the golf sector because of extended DST?

Title: Qing dynasty.
Question:
What coup happened in 1884?