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.

[Q]: 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? 
[A]: 18%


[Q]: Passage: 1,500 V DC is used in the Netherlands, Japan, Republic Of Indonesia, Hong Kong (parts), Republic of Ireland, Australia (parts), India (around the Mumbai area alone, has been converted to 25 kV AC like the rest of India), France (also using 25 kV 50 Hz AC), New Zealand (Wellington) and the United States (Chicago area on the Metra Electric district and the South Shore Line interurban line). In Slovakia, there are two narrow-gauge lines in the High Tatras (one a cog railway). In Portugal, it is used in the Cascais Line and in Denmark on the suburban S-train system. Question: How many narrow-gauge lines in Slovakia?
[A]: two


[Q]: Passage: Tajikistan (i/tɑːˈdʒiːkᵻstɑːn/, /təˈdʒiːkᵻstæn/, or /tæˈdʒiːkiːstæn/; Persian: تاجيكستان‎‎ Тоҷикистон [tɔd͡ʒikɪsˈtɔn]), officially the Republic of Tajikistan (Persian: جمهورى تاجيكستان‎‎ Tajik: Ҷумҳурии Тоҷикистон, Çumhuriji Toçikiston/Jumhuriyi Tojikiston; Russian: Респу́блика Таджикистан, Respublika Tadzhikistan), is a mountainous, landlocked country in Central Asia with an estimated 8 million people in 2013, and an area of 143,100 km2 (55,300 sq mi). It is bordered by Afghanistan to the south, Uzbekistan to the west, Kyrgyzstan to the north, and China to the east. Pakistan lies to the south, separated by the narrow Wakhan Corridor. Traditional homelands of Tajik people included present-day Tajikistan, Afghanistan and Uzbekistan. Question: What is the area of Tajikistan?
[A]:
143,100 km2