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 Input: Question: Has the maple leaf been used on any other coat of arms or country flags besides in Canada? Passage:The maple leaf has been used as a Canadian emblem since the 18th century. It was first used as a national symbol in 1868 when it appeared on the coat of arms of both Ontario and Quebec. In 1867, Alexander Muir composed the patriotic song "The Maple Leaf Forever", which became an unofficial anthem in English-speaking Canada. The maple leaf was later added to the Canadian coat of arms in 1921. From 1876 until 1901, the leaf appeared on all Canadian coins and remained on the penny after 1901. The use of the maple leaf by the Royal Canadian Regiment as a regimental symbol extended back to 1860. During the First World War and Second World War, badges of the Canadian Forces were often based on a maple leaf design. The maple leaf would eventually adorn the tombstones of Canadian military graves.

Example Output: b

Example Input: Question: What was the population of the Principality of Samtskhe while Sargis II Jaqeli was the ruler? Passage:Sargis II Jaqeli () (1271 1334) was a Georgian prince (mtavari) and ruler of Principality of Samtskhe from 1306 to 1334. He was a son of Prince Beka I Jaqeli. During his father's reign Sargis participated in many campaigns. In 1290s Azat Mousa, leader of the Anatolian Turkoman tribes, attacked Samtskhe. Beka Jaqeli appointed Sargis as a commander of army and ordered him to stop Turks near village Vashlovani. Around 1303, Sargis defeated Turkoman tribes and expelled them from Meskhetian lands. In 1306, after his father's death, Sargis ascended the Atabeg's throne. He was made Amirspasalar by his nephew, King George V "the Brilliant". After Sargis II's death, his son Qvarqvare became a new Prince of Meskheti, also the vassal of Georgian kingdom.

Example Output: a

Example Input: Question: How many days did Operation Barbarossa last? Passage:Born in Cologne-Lindenthal, Reinert volunteered for military service in the National Socialist Luftwaffe in 1938. Following flight training, he was posted to Jagdgeschwader 77 (JG7777th Fighter Wing). He fought in Operation Barbarossa, the German invasion of the Soviet Union, and claimed his first aerial victory on 8 August 1941. He received the Knight's Cross of the Iron Cross following his 53rd aerial victory. Accumulating further victories, he surpassed the century mark in October 1942 for which he was awarded the Knight's Cross of the Iron Cross with Oak Leaves. In November 1942, his unit was transferred to the Mediterranean theatre in support of the Afrika Korps. There, Reinert claimed 51 victories against the Western Allies. In August 1943, he was appointed Staffelkapitan (squadron leader) of 1. Staffel (1st squadron) of JG77, and in February 1944 the 8. Staffel of Jagdgeschwader 27 (JG2727th Fighter Wing) based in France. Reinert was then appointed Gruppenkommandeur (group commander) of IV. Gruppe (4th group) of JG27 and, credited with 174 aerial victories, received the Knight's Cross of the Iron Cross with Oak Leaves and Swords on 30 January 1945. He then received conversion training to the then new Messerschmitt Me 262 jet fighter and was posted to Jagdgeschwader 7 (JG77th Fighter Wing), an all-jet fighter wing.

Example Output:
a