In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

[EX Q]: What do you need to happen if you want the water in the water experiment to have a greater arc?, Context: Mach argued that, in effect, the water experiment in an otherwise empty universe would remain flat. But if another object were introduced into this universe, perhaps a distant star, there would now be something relative to which the bucket could be seen as rotating. The water inside the bucket could possibly have a slight curve. To account for the curve that we observe, an increase in the number of objects in the universe also increases the curvature in the water. Mach argued that the momentum of an object, whether angular or linear, exists as a result of the sum of the effects of other objects in the universe (Mach's Principle).
[EX A]: an increase in the number of objects in the universe

[EX Q]: who avenged Chu'Tsai's forefathers?, Context: Genghis Khan realised that he needed people who could govern cities and states conquered by him. He also realised that such administrators could not be found among his Mongol people because they were nomads and thus had no experience governing cities. For this purpose Genghis Khan invited a Khitan prince, Chu'Tsai, who worked for the Jin and had been captured by the Mongol army after the Jin dynasty was defeated. Jin had captured power by displacing Khitan. Genghis told Chu'Tsai, who was a lineal descendant of Khitan rulers, that he had avenged Chu'Tsai's forefathers. Chu'Tsai responded that his father served the Jin dynasty honestly and so did he; also he did not consider his own father his enemy, so the question of revenge did not apply. This reply impressed Genghis Khan. Chu'Tsai administered parts of the Mongol Empire and became a confidant of the successive Mongol Khans.
[EX A]: Genghis Khan

[EX Q]: what is the last area mentioned?, Context: The Uruguayan Basketball League is headquartered in Montevideo and most of its teams are from the city, including Defensor Sporting, Biguá, Aguada, Goes, Malvín, Unión Atlética, and Trouville. Montevideo is also a centre of rugby; equestrianism, which regained importance in Montevideo after the Maroñas Racecourse reopened; golf, with the Club de Punta Carretas; and yachting, with the Puerto del Buceo, an ideal place to moor yachts. The Golf Club of Punta Carretas was founded in 1894 covers all the area encircled by the west side of Bulevar Artigas, the Rambla (Montevideo's promenade) and the Parque Rodó (Fun Fair).
[EX A]:
Parque Rodó (Fun Fair)