Q: I know that the answer to the question "Who did the two doctors think had died?" is in "On 3 December, Chopin complained about his bad health and the incompetence of the doctors in Majorca: "Three doctors have visited me ... The first said I was dead; the second said I was dying; and the third said I was about to die." He also had problems having his Pleyel piano sent to him. It finally arrived from Paris in December. Chopin wrote to Pleyel in January 1839: "I am sending you my Preludes [(Op. 28)]. I finished them on your little piano, which arrived in the best possible condition in spite of the sea, the bad weather and the Palma customs." Chopin was also able to undertake work on his Ballade No. 2, Op. 38; two Polonaises, Op. 40; and the Scherzo No. 3, Op. 39.". Can you tell me what it is?
A: Chopin

Q: I know that the answer to the question "How many stations and rail lines are there in the combined network?" is in "New York City's commuter rail network is the largest in North America. The rail network, connecting New York City to its suburbs, consists of the Long Island Rail Road, Metro-North Railroad, and New Jersey Transit. The combined systems converge at Grand Central Terminal and Pennsylvania Station and contain more than 250 stations and 20 rail lines. In Queens, the elevated AirTrain people mover system connects JFK International Airport to the New York City Subway and the Long Island Rail Road; a separate AirTrain system is planned alongside the Grand Central Parkway to connect LaGuardia Airport to these transit systems. For intercity rail, New York City is served by Amtrak, whose busiest station by a significant margin is Pennsylvania Station on the West Side of Manhattan, from which Amtrak provides connections to Boston, Philadelphia, and Washington, D.C. along the Northeast Corridor, as well as long-distance train service to other North American cities.". Can you tell me what it is?
A: more than 250 stations and 20 rail lines

Q: I know that the answer to the question "In which state is Wayne County located?" is in "Detroit's courts are state-administered and elections are nonpartisan. The Probate Court for Wayne County is located in the Coleman A. Young Municipal Center in downtown Detroit. The Circuit Court is located across Gratiot Ave. in the Frank Murphy Hall of Justice, in downtown Detroit. The city is home to the Thirty-Sixth District Court, as well as the First District of the Michigan Court of Appeals and the United States District Court for the Eastern District of Michigan. The city provides law enforcement through the Detroit Police Department and emergency services through the Detroit Fire Department.". Can you tell me what it is?
A: Michigan

Q: I know that the answer to the question "What formed the Himalayan mountains?" is in "In many ways, the Paleocene continued processes that had begun during the late Cretaceous Period. During the Paleocene, the continents continued to drift toward their present positions. Supercontinent Laurasia had not yet separated into three continents. Europe and Greenland were still connected. North America and Asia were still intermittently joined by a land bridge, while Greenland and North America were beginning to separate. The Laramide orogeny of the late Cretaceous continued to uplift the Rocky Mountains in the American west, which ended in the succeeding epoch. South and North America remained separated by equatorial seas (they joined during the Neogene); the components of the former southern supercontinent Gondwana continued to split apart, with Africa, South America, Antarctica and Australia pulling away from each other. Africa was heading north toward Europe, slowly closing the Tethys Ocean, and India began its migration to Asia that would lead to a tectonic collision and the formation of the Himalayas.". Can you tell me what it is?
A:
a tectonic collision