This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

Ex Input:
Passage: In 2004, a large share of natural gas reserves in Iran were untapped. The addition of new hydroelectric stations and the streamlining of conventional coal and oil-fired stations increased installed capacity to 33,000 megawatts. Of that amount, about 75% was based on natural gas, 18% on oil, and 7% on hydroelectric power. In 2004, Iran opened its first wind-powered and geothermal plants, and the first solar thermal plant is to come online in 2009. Iran is the third country in the world to have developed GTL technology. Question: How much of Iran's 33k megawatt installed capacity was based on oil?

Ex Output:
18%

Ex Input:
Passage: In a traditional village, the monastery is the centre of cultural life. Monks are venerated and supported by the lay people. A novitiation ceremony called shinbyu is the most important coming of age events for a boy, during which he enters the monastery for a short time. All male children in Buddhist families are encouraged to be a novice (beginner for Buddhism) before the age of twenty and to be a monk after the age of twenty. Girls have ear-piercing ceremonies () at the same time. Burmese culture is most evident in villages where local festivals are held throughout the year, the most important being the pagoda festival. Many villages have a guardian nat, and superstition and taboos are commonplace. Question: What do girls of the village get in comparison the the young male event ?

Ex Output:
Girls have ear-piercing ceremonies () at the same time.

Ex Input:
Passage: From September 1823 to 1826 Chopin attended the Warsaw Lyceum, where he received organ lessons from the Czech musician Wilhelm Wurfel during his first year. In the autumn of 1826 he began a three-year course under the Silesian composer Jozef Elsner at the Warsaw Conservatory, studying music theory, figured bass and composition.[n 3] Throughout this period he continued to compose and to give recitals in concerts and salons in Warsaw. He was engaged by the inventors of a mechanical organ, the "eolomelodicon", and on this instrument in May 1825 he performed his own improvisation and part of a concerto by Moscheles. The success of this concert led to an invitation to give a similar recital on the instrument before Tsar Alexander I, who was visiting Warsaw; the Tsar presented him with a diamond ring. At a subsequent eolomelodicon concert on 10 June 1825, Chopin performed his Rondo Op. 1. This was the first of his works to be commercially published and earned him his first mention in the foreign press, when the Leipzig Allgemeine Musikalische Zeitung praised his "wealth of musical ideas". Question: Which tsar did Frederic perform for due to his success in previous concerts?

Ex Output:
Alexander I