Definition: In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it, i.e., the proper nouns in the passage. Your job is to determine whether information from more than one term is needed to answer the question. Indicate your choice as `a` for Yes or `b` for No.
Input: Question: Which of the armies involved in the Action of 22 Augst 1917 had more men? Passage:The Action of 22 August 1917, took place in the First World War, in the Ypres Salient on the Western Front during the Third Battle of Ypres. The engagement was fought by the Fifth Army of the British Expeditionary Force and the German 4th Army. During the Battle of Langemarck (16–18 August), the British had advanced north of the village but had been defeated further south and failed to capture the , the third German defensive position. At a conference with the Fifth Army corps commanders on 17 August, Gough arranged for local attacks to gain jumping-off positions for another general attack on 25 August. At the Action of the Cockcroft on 19 August, XVIII Corps and the 1st Tank Brigade had captured five fortified farms and strongpoints for a fraction of the casualties of a conventional attack.


a