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: How old was the commander Egon Mayer replaced as commander of JG 2? Passage 1:The American Locomotive Company (ALCO) assigned Kuhler to its advertising department in 1931 and commissioned him as a design consultant the following year. His first task was restyling the exterior trim of ALCO's Diesel switcher HH600 that persisted through all following variants. The next task established Kuhler's worldwide fame. The Milwaukee Road wanted a high-speed train for the competitive route between Chicago and Minneapolis. The cars were built in the company's shops, and the four A class locomotives were built by ALCO. Kuhler embellished their inverted bathtub look by a carefully colored livery. These Hiawatha trains became the fastest passenger service in the world by 1935. He had also designed the cars' interior, including the napkins and draperies in the dining car. His finned Beaver Tail observation car of the next generation was sensational, as were again the streamlined second-generation Milwaukee Road class F7 4-6-4 passenger locomotives designed by Kuhler. Also he designed the ALCO DL-109, the predecessor of world-famous ALCO PA diesel locomotives. He also designed Southern Railway (U.S.) Ps-4 class number 1380's streamlined appearance for The Tennessean in 1941. The 1380 was Southern's only streamlined steam engine.
 Passage 2:Formichetti is a prominent current member of the Haus of Gaga and his collaboration with Lady Gaga as her stylist or fashion director began in early May 2009 at a shoot with photographer Sebastian Faena for the July 2009 issue of V Magazine (V60), Formichetti saying that "It was an instant love." This was soon followed by a cover shoot for V61 (September issue) with Mario Testino. The following June he was fashion director for her performance at the 2009 MuchMusic Video Awards, and following that for the majority of Lady Gaga's important performances and appearances in the second half of 2009, including at the 2009 MTV Video Music Awards in September, where she appeared in four dresses by Jean-Paul Gaultier and one by Alexander McQueen, then on Saturday Night Live in October, where she appeared in a metal orb structure designed by Nazir Mazhar, and later at the Royal Variety Performance in December, where she appeared in a latex dress, by Atsuko Kudo, designed to resemble those worn by Elizabeth I of England, for Gaga's introduction to her namesake Elizabeth II. In the fall she also appeared in the third volume of Vogue Hommes Japan, the editorial titled "Lady Gaga & Araki's Tokyo Love" shot by Nobuyoshi Araki, with fashion direction by Formichetti. Their first collaboration in a music video together, for "Bad Romance", directed by Francis Lawrence, would later be voted Video of the Year and then win the Grammy Award for Best Short Form Music Video. In this Gaga appears in several outfits and footwear by Alexander McQueen, reappears in the orb by Nazir Mazhar, as well as in a "diamond crown" outfit by Franc Fernandez, and one by her creative team—the Haus of Gaga—among other pieces. Formichetti is also credited as stylist for her album The Fame Monster (shot by Hedi Slimane), and has been fashion director for her sold-out The Monster Ball Tour.
 Passage 3:Mayer claimed his first victories over United States Army Air Forces (USAAF) four-engine bombers when he shot down two B-17 Flying Fortresses and a B-24 Liberator on 23 November 1942. Together with fellow fighter ace Georg-Peter Eder, Mayer developed the head-on attack as the most effective tactic against the Allied daylight heavy combat box bomber formations. He received the Knight's Cross of the Iron Cross with Oak Leaves on 16 April 1943 after 63 victories. On 1 July 1943, he replaced Walter Oesau as commander of JG 2. He claimed his 90th victory on 31 December 1943 and on 5 February 1944 became the first pilot on the Channel Front to reach 100 victories. Mayer was killed in action on 2 March 1944 while leading an attack on a USAAF bomber formation; he was shot down by P-47 Thunderbolt escort fighters near Montmédy, France. He was posthumously awarded the Knight's Cross of the Iron Cross with Oak Leaves and Swords.

A:
3