In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as `a` for Yes or `b` for No.
Example: Question: When did the operation during which the 704th dropped supplies to allied troops near Nijmegen begin? Passage: The group was occasionally diverted from strategic missions to carry out air support and interdiction missions. It supported Operation Overlord, the invasion of Normandy by attacking transportation targets, including bridges, along with airfields and strong points in France. On D Day, the squadron and the rest of the 446th Group led the first heavy bomber mission of the day. The 446th aided ground forces at Caen and Saint-Lô during July by hitting bridges, gun batteries, and enemy troops. During Operation Market Garden, the attempt to seize a bridgehead across the Rhine in the Netherlands, the 704th dropped supplies to allied troops near Nijmegen. It struck lines of communications during the Battle of the Bulge. During Operation Varsity in March 1945, it supplied ground and airborne troops near Wesel. The squadron flew its last combat mission on 25 April 1945 against Salzburg, Austria. The group had flown 273 missions and had lost 58 aircraft during the war,
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Example solution: a
Example explanation: The passage describes the 704th's actions during Operation Market Garden so only information about the operation is needed.

Problem: Question: Which of the conflicts that occured between 1918 and 1921 occured first? Passage:A large portion of the Vilnius area was controlled by the Second Polish Republic during the interwar period, particularly the area of the Republic of Central Lithuania, which had a significant Polish speaking population. For example, the Wilno Voivodeship (25% of it is a part of modern Lithuania and 75% - modern Belarus) in 1931 contained 59.7% Polish speakers and only 5.2% Lithuanian speakers; see Ethnic history of the region of Vilnius for details. From 1918 to 1921 there were several conflicts, such as the activity of the Polish Military Organization, Sejny uprising (that was met with massive outrage in Lithuania) and a discovered attempt at a Polish coup on the Lithuanian government. From the documents stolen from Polish Military Organization headquarters safe in Vilnius and given to Prime Minister of Lithuania Augustinas Voldemaras, it is clear that this plot was directed by Józef Piłsudski himself. The Polish-Lithuanian War and Żeligowski's Mutiny contributed to a worsening of Polish-Lithuanian relations; increasingly Polish people were viewed with suspicion in Lithuania. The loss of Vilnius was a stunning blow to Lithuanian aspirations and identity, and the unrelenting irredentist demand for its return became one of the most important elements of Lithuanian political and social life in the interwar period. The irredentist campaign resulted in the emergence of feelings of hatred and revenge directed against the Poles in the Lithuanian society. In fact, the largest social organization in interwar Lithuania was the League for the Liberation of Vilnius, which propagated irredentist views in its magazine Mūsų Vilnius (Our Vilnius).


Solution: b