This task involves creating questions from a given passage that involve some kind of complex reasoning (including numerical reasoning).
The generated questions must require looking at more than one part of the passage to answer. Try to use a variety of reasoning types in your questions (some of the sample reasoning types are illustrated in the 'positive examples' field) and also have a variety of answer types (spans, numbers, dates). A span is a continuous phrase taken directly from the passage or question. In such questions, the answer spans are recommended to be five words. Questions with answer type "number", are expected to start with "How many". For instance, "How long did an event last?" can be phrased as "How many years did an event last?". To increase diversity, try to create more questions for which the answer will be multiple spans. Please create questions that require AT LEAST 2 arithmetic operations as illustrated in the 'positive examples' field. You are encouraged to try DIFFERENT COMBINATIONS of operations and not just limit to the combinations shown in those examples. The more challenging questions you create, the better it is.

Example Input: Passage: Spanish Town is the site of an early cast-iron bridge, designed by Thomas Wilson and manufactured by Walker and Company of Rotherham, England. Spanning the Rio Cobre, the bridge was erected in 1801 at a cost of 4,000. Its four arched ribs are supported on massive masonry abutments. After the abutments deteriorated, endangering the structure, it was listed in the 1998 World Monuments Watch by the World Monuments Fund. A restoration project began in 2004, with funding provided by American Express through World Monuments Fund. Progress was slow until 2008, when a renewed restoration effort was made. A first phase of restoration was completed in April 2010, when the repair of the abutments allowed the bridge to be reopened for the public. More recently, violence in the area has prevented the bridge from achieving the status of a UNESCO World Heritage Site.
Example Output: How many years after being built was it before the bridge restoration began?

Example Input: Passage: Forecasting airline interest in larger-capacity models, Boeing announced the stretched 767-300 in 1983 and the extended-range 767-300ER in 1984. Both models offered a 20 percent passenger capacity increase, while the extended-range version was capable of operating flights up to . Japan Airlines placed the first order for the 767-300 in September 1983. Following its first flight on January 30, 1986, the type entered service with Japan Airlines on October 20, 1986. The 767-300ER completed its first flight on December 9, 1986, but it was not until March 1987 that the first firm order, from American Airlines, was placed. The type entered service with American Airlines on March 3, 1988. The 767-300 and 767-300ER gained popularity after entering service, and came to account for approximately two-thirds of all 767s sold.
Example Output: How many months after the first flight of the 767-300 was the first flight of the 767-300ER?

Example Input: Passage: In late 1299, the Mongol Ilkhan Mahmud Ghazan, son of Arghun, took his army and crossed the Euphrates river to again invade Syria. They continued south until they were slightly north of Homs, and successfully took Aleppo. There, Ghazan was joined by forces from his vassal state of Cilician Armenia. The Mamluk relief force sent from Damascus met the Mongol army northeast of Homs, at the Battle of Wadi al-Khazandar in December 1299. The Mongols had some 60,000 troops, with about 40,000 Georgian and Armenian auxiliaries, and routed the Egyptian Mamluks with their much smaller force of 20,000-30,000 troops. The Mamluks retreated, and were harassed by Maronite and Druze bowmen who wanted independence from the Mamluks. One group of Mongols also split off from Ghazan's army, and pursued the retreating Mamluk troops as far as Gaza, pushing them back to Egypt.
Example Output:
About how many troops in all did the Mongols have on their side?