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: The invasion of Libya was a costly enterprise for Italy. Instead of the 30 million lire a month judged sufficient at its beginning, it reached a cost of 80 million a month for a much longer period than was originally estimated. The war cost Italy 1.3 billion lire, nearly a billion more than Giovanni Giolitti estimated before the war. This ruined ten years of fiscal prudence. After the withdrawal of the Ottoman army the Italians could easily extend their occupation of the country, seizing East Tripolitania, Ghadames, the Djebel and Fezzan with Murzuk during 1913. The outbreak of the First World War with the necessity to bring back the troops to Italy, the proclamation of the Jihad by the Ottomans and the uprising of the Libyans in Tripolitania forced the Italians to abandon all occupied territory and to entrench themselves in Tripoli, Derna, and on the coast of Cyrenaica. The Italian control over much of the interior of Libya remained ineffective until the late 1920s, when forces under the Generals Pietro Badoglio and Rodolfo Graziani waged bloody pacification campaigns. Resistance petered out only after the execution of the rebel leader Omar Mukhtar on September 15, 1931. The result of the Italian colonisation for the Libyan population was that by the mid-1930s it had been cut in half due to emigration, famine, and war casualties. The Libyan population in 1950 was at the same level as in 1911, approximately 1.5 million.
Example Output: After the withdrawal of the Ottoman army, how many parts of the country did the Italians seize?

Example Input: Passage: The Japanese attempted to deny the Russians use of Port Arthur. During the night of 13-14 February, the Japanese attempted to block the entrance to Port Arthur by sinking several concrete-filled steamers in the deep water channel to the port, but they sank too deep to be effective. A similar attempt to block the harbour entrance during the night of 3-4 May also failed. In March, the charismatic Vice Admiral Makarov had taken command of the First Russian Pacific Squadron with the intention of breaking out of the Port Arthur blockade. On 12 April 1904, two Russian pre-dreadnought battleships, the flagship Petropavlovsk and the Pobeda, slipped out of port but struck Japanese mines off Port Arthur. The Petropavlovsk sank almost immediately, while the Pobeda had to be towed back to port for extensive repairs. Admiral Makarov, the single most effective Russian naval strategist of the war, perished on the battleship Petropavlovsk. On 15 April 1904, the Russian government made overtures threatening to seize the British war correspondents who were taking the ship Haimun into warzones to report for the London-based Times newspaper, citing concerns about the possibility of the British giving away Russian positions to the Japanese fleet. The Russians quickly learned, and soon employed, the Japanese tactic of offensive minelaying. On 15 May 1904, two Japanese battleships, the Yashima and the Hatsuse, were lured into a recently laid Russian minefield off Port Arthur, each striking at least two mines. The Hatsuse sank within minutes, taking 450 sailors with her, while the Yashima sank while under tow towards Korea for repairs. On 23 June 1904, a breakout attempt by the Russian squadron, now under the command of Admiral Wilgelm Vitgeft, failed. By the end of the month, Japanese artillery were firing shells into the harbour.
Example Output: How many days passed between the two Russian pre-dreadnaught battleships struck mines and the two Japanese battleships triking mines?

Example Input: Passage: By late August 1921, Spain lost all the territories it had gained since 1909. Spanish troops were pushed back to Melilla, which was their biggest base in the eastern Rif. Spain still had 14,000 soldiers in Melilla. However, Abd el-Krim ordered his forces not to attack the town. He subsequently told the writer J. Roger-Matthieu that since citizens of other European nations were residing in Melilla, it was feared they would intervene in the war should their citizens come to harm. Other reasons included the dispersal of Rifian fighters from several loosely allied tribes following the victory at Annual; and the arrival in Melilla of substantial reinforcements from the Legion and other Spanish units recalled from operations in western Morocco. By the end of August Spanish forces at Melilla numbered 36,000 under General Jose Sanjurjo and the slow process of recovering the lost territory could begin. Thus the Spanish could keep their biggest base in the eastern Rif. Later Abd el-Krim would admit: "I bitterly regret this order. It was my biggest mistake. All the following tenor of events happened because of this mistake." By January 1922 the Spanish had retaken their major fort at Monte Arruit  and had reoccupied the coastal plain as far as Tistutin and Batel. The Rifian forces had consolidated their hold of the inland mountains and stalemate was reached. The Spanish military suffered losses even at sea; in March the transport ship Juan de Joanes was sunk in Alhucemas Bay by Riffian coastal batteries, and in August 1923, while shelling Riffian positions, the battleship España ran aground off Cape Tres Forcas and was eventually scrapped in situ. In a bid to break the stalemate, the Spanish military turned to the use of chemical weapons against the Riffians.
Example Output:
How many years did it take Spain in August 1921 to have lost all the territories it had gained since 1909?