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: The Cathedral of Brasilia in the capital of the Federative Republic of Brazil, is an expression of the architect Oscar Niemeyer. This concrete-framed hyperboloid structure, seems with its glass roof reaching up, open, to the heavens. On 31 May 1970, the Cathedral's structure was finished, and only the 70 m (229.66 ft) diameter of the circular area were visible. Niemeyer's project of Cathedral of Brasilia is based in the hyperboloid of revolution which sections are asymmetric. The hyperboloid structure itself is a result of 16 identical assembled concrete columns. These columns, having hyperbolic section and weighing 90 t, represent two hands moving upwards to heaven. The Cathedral was dedicated on 31 May 1970. Question: When was the Cathedral of Brasilia dedicated?

Output: 31 May 1970

Input: Consider Input: Passage: Maximilian was deeply dissatisfied with General Bazaine's decision to abandon the state capital of Chihuahua and immediately ordered Agustin B. Billaut to recapture the city. On December 11, 1865, Billaut with a force of 500 men took control of the city. By January 31, 1866 Billaut was ordered to leave Chihuahua, but he left behind 500 men to maintain control. At the zenith of their power, the imperialist forces controlled all but four states in Mexico; the only states to maintain strong opposition to the French were: Guerrero, Chihuahua, Sonora, and Baja California. Question: In which year did Billaut capture Chihuahua?

Output: 1865

Input: Consider Input: Passage: One of the first incidents of the book being challenged was in Hanover, Virginia, in 1966: a parent protested that the use of rape as a plot device was immoral. Johnson cites examples of letters to local newspapers, which ranged from amusement to fury; those letters expressing the most outrage, however, complained about Mayella Ewell's attraction to Tom Robinson over the depictions of rape. Upon learning the school administrators were holding hearings to decide the book's appropriateness for the classroom, Harper Lee sent $10 to The Richmond News Leader suggesting it to be used toward the enrollment of "the Hanover County School Board in any first grade of its choice". The National Education Association in 1968 placed the novel second on a list of books receiving the most complaints from private organizationsafter Little Black Sambo. Question: When was the first major controversy that surfaced from the book?
Output: 1966