Title: Frederic Chopin.
Question: During what years did Chopin receive instruction from Zywny?

Title: Imamah (Shia doctrine).
Question: Who does the Quran say was also from a pious family?

Title: Guam.
Question: What year did Magellan locate the island of Guam?

Title: Textual criticism.
Question:
What was the second step Bowers took in editing a single work with two versions?