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.

Input: Consider Input: Passage: In January 1956, the new Constitution of Egypt was drafted, entailing the establishment of a single-party system under the National Union (NU), a movement Nasser described as the "cadre through which we will realize our revolution". The NU was a reconfiguration of the Liberation Rally, which Nasser determined had failed in generating mass public participation. In the new movement, Nasser attempted to incorporate more citizens, approved by local-level party committees, in order to solidify popular backing for his government. The NU would select a nominee for the presidential election whose name would be provided for public approval. Question: What was the dominant political party?

Output: National Union

Input: Consider Input: Passage: Because of the acceptance of miscegenation, Brazil has avoided the binary polarization of society into black and white. In addition, it abolished slavery without a civil war. The bitter and sometimes violent racial tensions that have divided the US are notably absent in Brazil. According to the 2010 census, 6.7% of Brazilians said they were black, compared with 6.2% in 2000, and 43.1% said they were racially mixed, up from 38.5%. In 2010, Elio Ferreira de Araujo, Brazil's minister for racial equality, attributed the increases to growing pride among his country's black and indigenous communities. Question: How do the US and Brazil vary after slavery has ended?

Output: violent racial tensions that have divided the US are notably absent in Brazil.

Input: Consider Input: Passage: The city is home to many professional franchises/teams in national competitions including: cricket clubs Melbourne Stars, Melbourne Renegades and Victorian Bushrangers, which play in the Big Bash League and other domestic cricket competitions; soccer clubs Melbourne Victory and Melbourne City FC (known until June 2014 as Melbourne Heart), which play in the A-League competition, both teams play their home games at AAMI Park, with the Victory also playing home games at Etihad Stadium. Rugby league club Melbourne Storm which plays in the NRL competition; rugby union clubs Melbourne Rebels and Melbourne Rising, which play in the Super Rugby and National Rugby Championship competitions respectively; netball club Melbourne Vixens, which plays in the trans-Tasman trophy ANZ Championship; basketball club Melbourne United, which plays in the NBL competition; Bulleen Boomers and Dandenong Rangers, which play in the WNBL; ice hockey teams Melbourne Ice and Melbourne Mustangs, who play in the Australian Ice Hockey League; and baseball club Melbourne Aces, which plays in the Australian Baseball League. Rowing is also a large part of Melbourne's sporting identity, with a number of clubs located on the Yarra River, out of which many Australian Olympians trained. The city previously held the nation's premier long distance swimming event the annual Race to Prince's Bridge, in the Yarra River. Question: In which river was the annual Race to Prince's Bridge held?
Output: Yarra