Instructions: This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.
Input: In the 2011–12 season, Arsenal celebrated their 125th year anniversary. The celebrations included a modified version of the current crest worn on their jerseys for the season. The crest was all white, surrounded by 15 oak leaves to the right and 15 laurel leaves to the left. The oak leaves represent the 15 founding members of the club who met at the Royal Oak pub. The 15 laurel leaves represent the design detail on the six pence pieces paid by the founding fathers to establish the club. The laurel leaves also represent strength. To complete the crest, 1886 and 2011 are shown on either sides of the motto "Forward" at the bottom of the crest.
Output:
What celebration did Arsenal have in the 2011-12 season?