Problem: Does "He used them to teach his own technique of piano playingfor instance playing double thirds (Op." answer the question "What form are most of Chopin's etudes in?"

A: no

Problem: Does "On February 23, 1909, Bell was present as the Silver Dart flown by J.A.D. McCurdy from the frozen ice of Bras d'Or, made the first aircraft flight in Canada." answer the question "On what month and day did the Silver Dart take its first flight?"

A: yes

Problem: Does "To preserve apostolic succession the rite of consecrating him a bishop had to be performed by someone who was already a bishop." answer the question "Why did the ceromony of consecrating a bishop have to be preformed by someone who was already a bishop?"

A:
yes