instruction:
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.
question:
Passage: Within Galicia are the Autopista AP-9 from Ferrol to Vigo and the Autopista AP-53 (also known as AG-53, because it was initially built by the Xunta de Galicia) from Santiago to Ourense. Additional roads under construction include Autovia A-54 from Santiago de Compostela to Lugo, and Autovia A-56 from Lugo to Ourense. The Xunta de Galicia has built roads connecting comarcal capitals, such as the aforementioned AG-53, Autovia AG-55 connecting A Coruna to Carballo or AG-41 connecting Pontevedra to Sanxenxo. Question: The Autopista AP-53 was originally built by whom?
answer:
Xunta de Galicia

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Passage: Dismayed to find that groundbreaking work had already been undertaken by Helmholtz who had conveyed vowel sounds by means of a similar tuning fork "contraption", he pored over the German scientist's book. Working from his own erroneous mistranslation of a French edition, Bell fortuitously then made a deduction that would be the underpinning of all his future work on transmitting sound, reporting: "Without knowing much about the subject, it seemed to me that if vowel sounds could be produced by electrical means, so could consonants, so could articulate speech." He also later remarked: "I thought that Helmholtz had done it ... and that my failure was due only to my ignorance of electricity. It was a valuable blunder ... If I had been able to read German in those days, I might never have commenced my experiments!"[N 7] Question: By what means did Bell conclude vowel sounds could be made?
answer:
electrical

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Passage: United States of America: The torch relay's North American leg occurred in San Francisco, California on April 9. On the day of the relay officials diverted the torch run to an unannounced route. The start was at McCovey Cove, where Norman Bellingham of the U.S. Olympic Committee gave the torch to the first torchbearer, Chinese 1992 Olympic champion swimmer Lin Li. The planned closing ceremony at Justin Herman Plaza was cancelled and instead, a ceremony was held at San Francisco International Airport, where the torch was to leave for Buenos Aires. The route changes allowed the run to avoid large numbers of China supporters and protesters against China. As people found out there would be no closing ceremony at Justin Herman Plaza, there were angry reactions. One demonstrator was quoted as saying that the route changes were an effort to "thwart any organized protest that had been planned." San Francisco Board of Supervisors President Aaron Peskin, a critic of Mayor Gavin Newsom, said that it was a "cynical plan to please the Bush State Department and the Chinese government because of the incredible influence of money." Newsom, on the other hand, said he felt it was in "everyone's best interest" and that he believed people had been "afforded the right to protest and support the torch" despite the route changes. Peter Ueberroth, head of the U.S. Olympic Committee, praised the route changes, saying, "The city of San Francisco, from a global perspective, will be applauded." People who saw the torch were surprised and cheered as shown from live video of CBS and NBC. The cost to the city for hosting the event was reported to be USD $726,400, nearly half of which has been recovered by private fundraising. Mayor Gavin Newsom said that "exponential" costs associated with mass arrests were avoided by his decision to change the route in consultation with police chief Heather Fong. Question: The route end was changed from Justin Herman plaza to what?
answer:
San Francisco International Airport