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: From the caliphate's north-western African bases, a series of raids on coastal areas of the Visigothic Kingdom paved the way to the permanent occupation of most of Iberia by the Umayyads (starting in 711), and on into south-eastern Gaul (last stronghold at Narbonne in 759). Hisham's reign witnessed the end of expansion in the west, following the defeat of the Arab army by the Franks at the Battle of Tours in 732. In 739 a major Berber Revolt broke out in North Africa, which was subdued only with difficulty, but it was followed by the collapse of Umayyad authority in al-Andalus. In India the Arab armies were defeated by the south Indian Chalukya dynasty and by the north Indian Pratiharas Dynasty in the 8th century and the Arabs were driven out of India. In the Caucasus, the confrontation with the Khazars peaked under Hisham: the Arabs established Derbent as a major military base and launched several invasions of the northern Caucasus, but failed to subdue the nomadic Khazars. The conflict was arduous and bloody, and the Arab army even suffered a major defeat at the Battle of Marj Ardabil in 730. Marwan ibn Muhammad, the future Marwan II, finally ended the war in 737 with a massive invasion that is reported to have reached as far as the Volga, but the Khazars remained unsubdued. Question: Who defeated the Arabs at the Battle of Tours?
answer:
Franks


question:
Passage: In February 2007, the U.S. Mint, under the Presidential $1 Coin Act of 2005, introduced a new $1 U.S. Presidential dollar coin. Based on the success of the "50 State Quarters" series, the new coin features a sequence of presidents in order of their inaugurations, starting with George Washington, on the obverse side. The reverse side features the Statue of Liberty. To allow for larger, more detailed portraits, the traditional inscriptions of "E Pluribus Unum", "In God We Trust", the year of minting or issuance, and the mint mark will be inscribed on the edge of the coin instead of the face. This feature, similar to the edge inscriptions seen on the British £1 coin, is not usually associated with U.S. coin designs. The inscription "Liberty" has been eliminated, with the Statue of Liberty serving as a sufficient replacement. In addition, due to the nature of U.S. coins, this will be the first time there will be circulating U.S. coins of different denominations with the same president featured on the obverse (heads) side (Lincoln/penny, Jefferson/nickel, Franklin D. Roosevelt/dime, Washington/quarter, Kennedy/half dollar, and Eisenhower/dollar). Another unusual fact about the new $1 coin is Grover Cleveland will have two coins with his portrait issued due to the fact he was the only U.S. President to be elected to two non-consecutive terms. Question: In which year was the new $1 US Presidential coin introduced?
answer:
2007


question:
Passage: The Bibliothèque nationale de France (BnF) operates public libraries in Paris, among them the François Mitterrand Library, Richelieu Library, Louvois, Opéra Library, and Arsenal Library. There are three public libraries in the 4th arrondissement. The Forney Library, in the Marais district, is dedicated to the decorative arts; the Arsenal Library occupies a former military building, and has a large collection on French literature; and the Bibliothèque historique de la ville de Paris, also in Le Marais, contains the Paris historical research service. The Sainte-Geneviève Library is in 5th arrondissement; designed by Henri Labrouste and built in the mid-1800s, it contains a rare book and manuscript division. Bibliothèque Mazarine, in the 6th arrondissement, is the oldest public library in France. The Médiathèque Musicale Mahler in the 8th arrondissement opened in 1986 and contains collections related to music. The François Mitterrand Library (nicknamed Très Grande Bibliothèque) in the 13th arrondissement was completed in 1994 to a design of Dominique Perrault and contains four glass towers. Question: Which library contains four glass towers?
answer:

The François Mitterrand Library