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.

Example Input: Passage: The economic output of the metropolitan area alone is worth more than one third of national GDP around $6.5billion in terms of nominal GDP NR.s 550 billion approximately per year $2200 per capital income approx three times national average. Kathmandu exports handicrafts, artworks, garments, carpets, pashmina, paper; trade accounts for 21% of its finances.[which?] Manufacturing is also important and accounts for 19% of the revenue that Kathmandu generates. Garments and woolen carpets are the most notable manufactured products. Other economic sectors in Kathmandu include agriculture (9%), education (6%), transport (6%), and hotels and restaurants (5%). Kathmandu is famous for lokta paper and pashmina shawls. Question: What is the GDP of Kathmandu?
Example Output: 6.5billion

Example Input: Passage: Though researchers generally believe that sexual orientation is not determined by any one factor but by a combination of genetic, hormonal, and environmental influences, with biological factors involving a complex interplay of genetic factors and the early uterine environment, they favor biological models for the cause. They believe that sexual orientation is not a choice, and some of them believe that it is established at conception. That is, individuals do not choose to be homosexual, heterosexual, bisexual, or asexual. While current scientific investigation usually seeks to find biological explanations for the adoption of a particular sexual orientation, there are yet no replicated scientific studies supporting any specific biological etiology for sexual orientation. However, scientific studies have found a number of statistical biological differences between gay people and heterosexuals, which may result from the same underlying cause as sexual orientation itself. Question: What do researchers generally believe causes sexual orientation?
Example Output: a combination of genetic, hormonal, and environmental influences

Example Input: Passage: Kenya's first system of education was introduced by British colonists. After Kenya's independence on 12 December 1963, an authority named the Ominde Commission was formed to introduce changes that would reflect the nation's sovereignty. The commission focused on identity and unity, which were critical issues at the time. Changes in the subject content of history and geography were made to reflect national cohesion. Between 1964 and 1985, the 7423 system was adopted seven years of primary, four years of lower secondary, two years of upper secondary, and three years of university. All schools had a common curriculum. Question: What system was adopted for education?
Example Output:
7423