In this task, you're given a question, along with three passages, 1, 2, and 3. Your job is to determine which passage can be used to answer the question by searching for further information using terms from the passage. Indicate your choice as 1, 2, or 3.
Q: Question: Who was the first head coach of the team that joined the NHL in 1924? Passage 1:Hanno Drechsler went to school in Saxony, where after High School he studied to become a teacher and was certified for doing so on all levels, becoming very early the Principal of the Oberschule in Falkenstein. Because of political conflicts with the SED regime (such as the toleration of students who were members of a church), he and his wife fled East Germany in 1955, and settled in Marburg, West Germany. Here, Drechsler studied again, at the University of Marburg (1955–1961), mostly Political Science, History, and the German language, and became a student and then assistant of the political scientist Wolfgang Abendroth who was the main representative of political science of the "Frankfurt School". In 1962, he received his PhD with a thesis on the Sozialistische Arbeiterpartei Deutschlands (SAP), and became an expert on the small parties "between" social democrats and communists during the Weimar Republic.
 Passage 2:They flew a mission to the Lofoten Islands on 9 July 1944, searching the coastal shipping lanes and photographing the mainland town of Bodø. Bad weather in northern Scotland on their return prevented a landing, and they finally landed at RAF Leuchars with just 10 gallons left in the fuel tanks. On 12 July, they again flew, via a refuelling stop at RAF Sumburgh in the Shetland Islands, to the Lofoten Islands, and then on to Altenfjord, to search for German surface vessels, flying 750 miles to the Norwegian coast above thick cloud. The top cover of their aeroplane blew off as they descended towards the fjord to make their photography run, subjecting the crew to freezing temperatures for the remainder of the flight. They made a photographic run over the targets they found, including the Tirpitz. They lost their codebooks through the open hatch, so were unable to obtain radio assistance on the way back. They flew 2,300 miles in a mission that lasted nearly 8 hours, landing at RAF Wick, but were immediately refuelled and sent on to Leuchars for the photographs to be developed. The intelligence brought by these missions were of crucial importance: Flight Lieutenant (later Air Vice Marshal) Dodd was awarded an immediate Distinguished Service Order and Flight Sergeant Hill an immediate Distinguished Flying Medal. The citations were gazetted on 8 September and read:
 Passage 3:Much as was the case of the concurrent development of professional gridiron football, the Pittsburgh, Pennsylvania metropolitan area was one of the first areas to promote a professional ice hockey team. The Western Pennsylvania Hockey League began hiring professional players in 1902 and acted as a pro–am league. This league joined with teams in Michigan and Ontario to form the International Professional Hockey League in 1904, with Houghton, Michigan dentist Jack Gibson its founder. While this league had folded by 1907, it was the start of professional hockey. The United States would continue to see professional hockey with teams from the PCHL, beginning with the Portland Rosebuds, followed by a Seattle-based franchise a year later. When the Boston Bruins joined the NHL in 1924, the United States was finally represented in the league. It would continue to grow in the NHL until a peak in the 2000s (decade), when 24 of the NHL's 30 teams were in the United States (the loss of the Atlanta Thrashers to Winnipeg in 2011 reduced this number to 23; it returned to 24 American teams when the Vegas Golden Knights joined in 2017). The NHL will reach a higher peak when the Seattle expansion franchise joins the league in 2021-22 as the 25th American team. There are several other pro leagues in the US as well; as of 2019 these include the AHL, ECHL, SPHL, and FPHL. The AHL and ECHL are official minor leagues to the NHL, with the ECHL subservient to the AHL; the FPHL and SPHL operate as low-level independents.

A:
3