Q: Does "The last opus number that Chopin himself used was 65, allocated to the Cello Sonata in G minor." provide a valid answer to "What is the last opus number that Chopin used?"?
A: yes

Q: Does "Back in Warsaw that year, Chopin heard Niccolo Paganini play the violin, and composed a set of variations, Souvenir de Paganini." provide a valid answer to "What did Chopin compose after hearing Niccolo Paganini?"?
A: yes

Q: Does "It is believed that Nanjing was the largest city in the world from 1358 to 1425 with a population of 487,000 in 1400." provide a valid answer to "What was the number of people in Nanjing in 1400?"?
A: yes

Q: Does "Yet this measure only led to further hostilities, and Sweden broke away for good in 1523." provide a valid answer to "In what year did the Stockholm Bloodbath take place?"?
A:
no