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 Input:
Passage: In December, Beyoncé along with a variety of other celebrities teamed up and produced a video campaign for "Demand A Plan", a bipartisan effort by a group of 950 US mayors and others designed to influence the federal government into rethinking its gun control laws, following the Sandy Hook Elementary School shooting. Beyoncé became an ambassador for the 2012 World Humanitarian Day campaign donating her song "I Was Here" and its music video, shot in the UN, to the campaign. In 2013, it was announced that Beyoncé would work with Salma Hayek and Frida Giannini on a Gucci "Chime for Change" campaign that aims to spread female empowerment. The campaign, which aired on February 28, was set to her new music. A concert for the cause took place on June 1, 2013 in London and included other acts like Ellie Goulding, Florence and the Machine, and Rita Ora. In advance of the concert, she appeared in a campaign video released on 15 May 2013, where she, along with Cameron Diaz, John Legend and Kylie Minogue, described inspiration from their mothers, while a number of other artists celebrated personal inspiration from other women, leading to a call for submission of photos of women of viewers' inspiration from which a selection was shown at the concert. Beyoncé said about her mother Tina Knowles that her gift was "finding the best qualities in every human being." With help of the crowdfunding platform Catapult, visitors of the concert could choose between several projects promoting education of women and girls. Beyoncé is also taking part in "Miss a Meal", a food-donation campaign, and supporting Goodwill charity through online charity auctions at Charitybuzz that support job creation throughout Europe and the U.S. Question: What song did Beyoncé donate to the 2012 World Humanitarian Day campaign?

Ex Output:
I Was Here


Ex Input:
Passage: By the spring of 49 BC, the hardened legions of Caesar crossed the river Rubicon, the legal boundary of Roman Italy beyond which no commander might bring his army, and swept down the Italian peninsula towards Rome, while Pompey ordered the abandonment of Rome. Afterwards Caesar turned his attention to the Pompeian stronghold of Hispania (modern Spain) but decided to tackle Pompey himself in Greece. Pompey initially defeated Caesar, but failed to follow up on the victory, and was decisively defeated at the Battle of Pharsalus in 48 BC, despite outnumbering Caesar's forces two to one, albeit with inferior quality troops. Pompey fled again, this time to Egypt, where he was murdered. Question: Who decided to attack Pompey in Greece?

Ex Output:
Caesar


Ex Input:
Passage: The nationalization announcement was greeted very emotionally by the audience and, throughout the Arab world, thousands entered the streets shouting slogans of support. US ambassador Henry A. Byroade stated, "I cannot overemphasize [the] popularity of the Canal Company nationalization within Egypt, even among Nasser's enemies." Egyptian political scientist Mahmoud Hamad wrote that, prior to 1956, Nasser had consolidated control over Egypt's military and civilian bureaucracies, but it was only after the canal's nationalization that he gained near-total popular legitimacy and firmly established himself as the "charismatic leader" and "spokesman for the masses not only in Egypt, but all over the Third World". According to Aburish, this was Nasser's largest pan-Arab triumph at the time and "soon his pictures were to be found in the tents of Yemen, the souks of Marrakesh, and the posh villas of Syria". The official reason given for the nationalization was that funds from the canal would be used for the construction of the dam in Aswan. That same day, Egypt closed the canal to Israeli shipping. Question: Where was Nasser believed to be a spokesman for the poor and oppressed?

Ex Output:

not only in Egypt, but all over the Third World