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.

Example Input: 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?
Example Output: Franks

Example Input: Passage: Where there is a distinction, Nasrani refers to people from a Christian culture and Masihi means those with a religious faith in Jesus. In some countries Nasrani tends to be used generically for non-Muslim Western foreigners, e.g. "blond people." Question: What description is used for Western people who do not follow the Muslim faith?
Example Output: Nasrani

Example Input: Passage: In 1871, after the end of the war, the city was annexed to the newly established German Empire as part of the Reichsland Elsass-Lothringen under the terms of the Treaty of Frankfurt. As part of Imperial Germany, Strasbourg was rebuilt and developed on a grand and representative scale, such as the Neue Stadt, or "new city" around the present Place de la République. Historian Rodolphe Reuss and Art historian Wilhelm von Bode were in charge of rebuilding the municipal archives, libraries and museums. The University, founded in 1567 and suppressed during the French Revolution as a stronghold of German sentiment,[citation needed] was reopened in 1872 under the name Kaiser-Wilhelms-Universität. Question: What was the Treaty in 1871 called?
Example Output:
Treaty of Frankfurt