Detailed Instructions: 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.
Problem:Passage: On 10 December 1916, his twenty-fifth birthday, Alexander became second-in-command (2-i-c) of the 1st Battalion, Irish Guards as an acting major. By May, he was briefly acting CO of the 1st Battalion, as an acting Lieutenant colonel (United Kingdom), while still only a substantive captain. He became a permanent major on 1 August 1917 and was again promoted acting lieutenant colonel, this time confirmed as CO of the 2nd Battalion, Irish Guards, on 15 October. Alexander commanded his battalion at Battle of Passchendaele, where he was slightly wounded, then at Bourlon Wood (part of the Battle of Cambrai (1917)), where his battalion suffered 320 casualties out of 400 men. Alexander, between 23 and 30 March 1918, had to assume command of the 4th Guards Brigade (United Kingdom), during the British retreat from the German Army (German Empire)s Spring Offensive. He once again commanded the 2nd Battalion, Irish Guards at Hazebrouck in April 1918, where it took such severe casualties that it saw no further action. Still an acting lieutenant colonel, he then commanded a corps infantry school in October 1918, a month before the war ended on Armistice of 11 November 1918.
Solution:
For how many days did Alexander assume command of the 4th Guards Brigade (United Kingdom)?