You will be given a definition of a task first, then some input of the task.
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.

Question: When did Citadel Media become Cumulus Media Networks? Passage 1:Coward was commissioned into the Royal Air Force as an acting pilot officer (on probation) on 28 January 1937. He joined No. 19 Squadron based at RAF Duxford as a pilot flying the Gloster Gauntlet, a single seat biplane. His commission was confirmed and he was regraded as a pilot officer on 16 November 1937. Having shown his artistic skill through caricatures of his comrades, he was tasked with painting the squadron badge on the canvas of the biplanes. However, after weeks of work, the Munich Crisis occurred and the biplanes, and their recently painted badges, were painted over in camouflage. His squadron was the first to be equipped with the Supermarine Spitfire, which entered service on 4 August 1938. He was promoted to flying officer on 16 June 1939. 
 Passage 2:KVOB started as KQNS-FM in September 1988, then located on 95.9 FM with an ERP of 1.3 kW. At the time, the station carried an adult contemporary format. In 1994, B-B Broadcasting bought the station from Smoky Hill Broadcasting, and the following year, the station moved to 95.5 FM and upgraded their power to 15.5 kW. By this time, the station flipped to a mainstream rock format, branded as "Star 95." In 1999, the station flipped back to adult contemporary, keeping the "Star 95" moniker. In 2004, the station began running the "Hits & Favorites" satellite feed from Citadel Media (now Cumulus Media Networks) and changed monikers to "Lite Rock 95.5". A year later, the station switched satellite feeds to Westwood One's AC feed, again keeping the "Lite Rock 95.5" moniker. In 2006, the station rebranded as "OZ 95", again keeping the AC format. In 2007, the station flipped to adult hits, branded as "Bob FM". The station was assigned the KVOB call sign by the Federal Communications Commission on December 1, 2007. A year later, the station switched to Sparknet Communications' national feed of "Jack FM", again retaining the adult hits format.
 Passage 3:The Company was founded in 1946 by Friedl Pfeifer, an Austrian ski instructor and racing champion, Walter Paepcke, a successful Chicago industrialist, Judge William E. Doyle, James J. Johnston, and H. F. Klock. Paepcke also founded cultural institutions in the city, such as the Aspen Institute and the Aspen Music Festival. The Aspen Skiing Company established the Aspen Mountain ski resort on Aspen Mountain above the town of Aspen, Colorado. The first chair lift, Lift-1, opened on December 14, 1946, and was the world's longest chairlift at the time. In 1950, the company hosted the FIS World Alpine Championships, the first international skiing competition in the United States. In the following decades, the company opened Buttermilk in 1958 and the Snowmass (originally the Snowmass-at-Aspen Ski Area) in 1967. In 1993 the company assumed ownership and operation of Aspen Highlands, which was founded in 1958 by Colorado Ski Hall of Famer: Whip Jones. Previously, Jones successfully sued Aspen Skiing before the Supreme Court for antitrust violations in Aspen Skiing Co. v. Aspen Highlands Skiing Corp.

Output:
2