Question: Two-man bobsleigh at the 1964 Winter Olympics took place on 31 January and 1 February at Bob und Rodelbahn Igls, Innsbruck, Austria, Innsbruck is the capital city of which city, in western Austria?

full_context: Document 1: Bobsleigh at the 2012 Winter Youth Olympics: Bobsleigh at the 2012 Winter Youth Olympics took place at the Olympic Sliding Centre Innsbruck in Igls, Innsbruck, Austria on January 16. The competition had a 2 boys' and a 2 girls' events, with the 4 boys' competition being excluded.
Document 2: Bobsleigh at the 1976 Winter Olympics – Two-man: The Two-man bobsleigh competition at the 1976 Winter Olympics in Innsbruck was held on 6 and 7 February, at Olympic Sliding Centre Innsbruck.
Document 3: Tyrolean Ice Arena: Tiroler Wasserkraft Arena is an indoor sporting arena located in Innsbruck, Austria. The arena has a capacity of 3,000 people and was built in 2005 for the 2005 World Ice Hockey Championships. It is currently the home arena of HC Innsbruck who play in the Austrian Hockey League.
Document 4: Nordkette: The Nordkette, also variously called the North Chain, Northern Range, rarely the Inn Valley Range or Inn Valley Chain ("Inntalkette"), is a range of mountains just north of the city of Innsbruck in Austria. It is the southernmost of the four great mountain chains in the Karwendel. To the west it is linked by the Erl Saddle to the Erlspitze Group, to the east via the "Stempeljoch" saddle ( m (AA) ) to the Gleirsch-Halltal Range. To the south it is bounded by the Inn valley. Its highest summit is the Kleiner Solstein ( m (AA) ) in the west of the range.
Document 5: Kufstein: Kufstein is a town in the Austrian state of Tyrol, the administrative seat of Kufstein District. With a population of about 18,400, it is the second largest Tyrolean town after the state capital Innsbruck. The greatest landmark is Kufstein Fortress, first mentioned in the 13th century.
Document 6: Bolzano: Bolzano ( ; ] ,    or ] ; German: "Bozen" (formerly "Botzen"), ] ; Ladin: "Balsan" or "Bulsan"; Latin: "Bauzanum" ) is the capital city of the province of South Tyrol in northern Italy. With a population of 105,713 (2013), Bolzano is also by far the largest city in South Tyrol.
Document 7: Bobsleigh at the 1964 Winter Olympics – Four-man: Four-man bobsleigh at the 1964 Winter Olympics took place on 5 and 7 February at Bob und Rodelbahn Igls, Innsbruck, Austria. This event was last run at the 1956 Winter Olympics as bobsleigh was not part of the 1960 games.
Document 8: Linz: Linz ( ; ] ; Czech: "Linec" ) is the third-largest city of Austria and capital of the state of Upper Austria (German: "Oberösterreich" ). It is in the north centre of Austria, approximately 30 km south of the Czech border, on both sides of the River Danube. The population of the city is , and that of the Greater Linz conurbation is about 271,000.
Document 9: Innsbruck: Innsbruck (] , ] ) is the capital city of Tyrol in western Austria. It is in the Inn valley, at its junction with the Wipp valley, which provides access to the Brenner Pass some 30 km to the south.
Document 10: Bobsleigh at the 2010 Winter Olympics – Two-man: The two-man bobsleigh competition at the 2010 Winter Olympics in Vancouver, British Columbia, Canada was held at the Whistler Sliding Centre in Whistler, British Columbia on 20–21 February. The German team of André Lange and Kevin Kuske were the defending Olympic champions in this event. Switzerland's team of Ivo Rüegg and Cedric Grand were the defending world champions in this event. The test event held at the Olympic venue was won by the German duo of Thomas Florschütz and Marc Kühne. The last World Cup event prior to the 2010 Games took place in Igls, Austria (southeast of Innsbruck) on 23 January 2010 and was won by the Swiss duo of Beat Hefti and Thomas Lamparter while Rüegg won the overall World Cup in the two-man event.
Document 11: Bobsleigh at the 1964 Winter Olympics: The Bobsleigh 1964 Winter Olympics events took place between 31 January - 7 February 1964 at Bob und Rodelbahn Igls, Innsbruck, Austria. This marked the return of Bobsleigh to the Winter Olympics as no bob events took place at the 1960 Winter Olympics.
Document 12: 1964 Winter Olympics: The 1964 Winter Olympics, officially known as the IX Olympic Winter Games (French: Les "IXes Jeux olympiques d'hiver") (German: "Olympische Winterspiele 1964"), was a winter multi-sport event which was celebrated in Innsbruck, Austria, from January 29 to February 9, 1964. The Games included 1091 athletes from 36 nations, and the Olympic Torch was carried by Joseph Rieder, a former alpine skier who had participated in the 1956 Winter Olympics.
Document 13: Bobsleigh at the 1994 Winter Olympics – Two-man: Two-man bobsleigh at the 1994 Winter Olympics took place on 19 and 20 February 1994 at Lillehammer Olympic Bobsleigh and Luge Track.
Document 14: Salzburg: Salzburg (] ; Bavarian: "Såizburg" ; literally: "Salt Fortress") is the fourth-largest city in Austria and the capital of the federal state of Salzburg.
Document 15: Bobsleigh at the 1964 Winter Olympics – Two-man: Two-man bobsleigh at the 1964 Winter Olympics took place on 31 January and 1 February at Bob und Rodelbahn Igls, Innsbruck, Austria. This event was last run at the 1956 Winter Olympics as bobsleigh was not part of the 1960 games.
ground_truth: Tyrol