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.

Passage: The "Rheinische" Carnival is held in the west of Germany, mainly in the states of North Rhine-Westphalia or Nordrhein-Westfalen, Rhineland Palatinate or Rheinland-Pfalz, but also in Hessen [including Oberhessen], Bavaria and other states. Some cities are more famous for celebrations such as parades and costume balls. Köln or Cologne Carnival, as well as Mainz and Düsseldorf are the largest and most famous. Other cities have their own, often less well-known celebrations, parades and parties such as Worms am Rhein, Speyer, Kaiserslautern, Frankfurt, Darmstadt, Mannheim, Ludwigshafen, Stuttgart, Augsburg and München [Munich] Nürnberg. On Carnival Thursday (called "Old Women Day" or "The Women's Day") in commemoration of an 1824 revolt by washer-women, women storm city halls, cut men's ties, and are allowed to kiss any passing man. Question: Cologne Carnival is one of the largest Carnivals and also is the most what?
famous

Passage: The foundation of Northwestern University is traceable to a meeting on May 31, 1850 of nine prominent Chicago businessmen, Methodist leaders and attorneys who had formed the idea of establishing a university to serve what had once been known as the Northwest Territory. On January 28, 1851, the Illinois General Assembly granted a charter to the Trustees of the North-Western University, making it the first chartered university in Illinois. The school's nine founders, all of whom were Methodists (three of them ministers), knelt in prayer and worship before launching their first organizational meeting. Although they affiliated the university with the Methodist Episcopal Church, they were committed to non-sectarian admissions, believing that Northwestern should serve all people in the newly developing territory. Question: How many founders did Northwestern University have?
nine

Passage: The centuries-long geopolitical and ideological rivalry between Safavid Iran and the neighboring Ottoman Empire, led to numerous Ottoman–Persian Wars. The Safavid Era peaked in the reign of Abbas the Great, 1587–1629, surpassing their Ottoman arch rivals in strength, and making the empire a leading hub in Western Eurasia for the sciences and arts. The Safavid Era saw the start of mass integration from Caucasian populations into new layers of the society of Iran, as well as mass resettlement of them within the heartlands of Iran, playing a pivotal role in the history of Iran for centuries onwards. Following a gradual decline in the late 1600s and early 1700s, which was caused by the internal conflicts, the continuous wars with the Ottomans, and the foreign interference (most notably the Russian interference), the Safavid rule was ended by the Pashtun rebels who besieged Isfahan and defeated Soltan Hosein in 1722. Question: What Empire neighbored and had a rivalry with Safavid Iran?

Ottoman Empire