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 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?
[EX A]: two

[EX Q]: Passage: Prior to Confederation in 1867, residents of the colonies in what is now Canada served as regular members of French and British forces and in local militia groups. The latter aided in the defence of their respective territories against attacks by other European powers, Aboriginal peoples, and later American forces during the American Revolutionary War and War of 1812, as well as in the Fenian raids, Red River Rebellion, and North-West Rebellion. Consequently, the lineages of some Canadian army units stretch back to the early 19th century, when militia units were formed to assist in the defence of British North America against invasion by the United States. Question: The forces of what countries did people serve before the unification?
[EX A]: French and British forces

[EX Q]: Passage: On July 1, 2014, the University of Notre Dame and Under Armour reached an agreement in which Under Armour will provide uniforms, apparel,equipment, and monetary compensation to Notre Dame for 10 years. This contract, worth almost $100 million, is the most lucrative in the history of the NCAA. The university marching band plays at home games for most of the sports. The band, which began in 1846 and has a claim as the oldest university band in continuous existence in the United States, was honored by the National Music Council as a "Landmark of American Music" during the United States Bicentennial. The band regularly plays the school's fight song the Notre Dame Victory March, which was named as the most played and most famous fight song by Northern Illinois Professor William Studwell. According to College Fight Songs: An Annotated Anthology published in 1998, the "Notre Dame Victory March" ranks as the greatest fight song of all time. Question: What is the Notre Dame fight song?
[EX A]:
Notre Dame Victory March