Definition: 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.
Input: Passage: At the beginning of March 1919 the general offensive of the Whites on the eastern front began. Ufa was retaken on 13 March; by mid-April, the White Army stopped at the Glazov-Chistopol-Bugulma-Buguruslan-Sharlyk line. Reds started their counteroffensive against Kolchak's forces at the end of April. The Red 5th Army, led by the capable commander Tukhachevsky, captured Elabuga on 26 May, Sarapul on 2 June and Izevsk on the 7th and continued to push forward. Both sides had victories and losses, but by the middle of summer the Red Army was larger than the White Army and had managed to recapture territory previously lost. Following the abortive offensive at Chelyabinsk, the White armies withdrew beyond the Tobol. In September 1919 a White offensive was launched against the Tobol front, the last attempt to change the course of events. However, on 14 October the Reds counterattacked, and thus began the uninterrupted retreat of the Whites to the east. On 14 November 1919 the Red Army captured Omsk. Adm. Kolchak lost control of his government shortly after this defeat; White Army forces in Siberia essentially ceased to exist by December. Retreat of the eastern front by White armies lasted three months, until mid-February 1920, when the survivors, after crossing Lake Baikal, reached Chita area and joined Ataman Semenov's forces.
Output:
About how long was it before the Reds' counteroffensive began?