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.

Input: Consider Input: Question: Who succeeded Khalid's son as ruler of  the family's stronghold? Passage:Khalid was a member of the Shayban tribe, dominant in the region of Diyar Bakr in the northern Jazira, and third son of Yazid ibn Mazyad al-Shaybani, who served twice as Arab governor (ostikan) of Arminiya (a large province encompassing the whole of Transcaucasia). Khalid served in the same office no less than four times: in 813/814, 828–832, briefly in 841 and again under Caliph al-Wathiq (r. 842–845). In his first tenure, he showed himself conciliatory towards the native Christian population and the nakharar princes, but his second tenure was marked by the brutal suppression of several revolts by local Arab magnates, as well as the harsh treatment of the Christian population. As a result, when his re-appointment to the office was announced in 841, a rebellion broke out, forcing the Abbasid government to recall him immediately. Nevertheless, al-Wathiq assigned Arminiya to Khalid. The latter arrived in the province at the head of an army, and crushed any opposition. He died soon after at Dvin, where he was buried. He was succeeded by his son, Muhammad. His younger son Haytham ibn Khalid ruled in the family's stronghold of Shirvan, and was the first to claim the title of Shirvanshah.


Output: b


Input: Consider Input: Question: How many Boy Wonder's have there been? Passage:Besides the aforementioned death of Stephanie Brown, many other side effects came about from this event. The biggest of these included Black Mask becoming the single crime boss in Gotham, something that would remain until his death at the hands of Catwoman. Another would be Commissioner Akins effectively making all vigilantes criminals, a move that would stay in place for over a year until the return of Commissioner Gordon to the Gotham City Police Department. The more controversial effect, not seen until the follow-up story War Crimes, was turning Doctor Leslie Thompkins against Batman, when she allows Stephanie Brown to die from her wounds as Batman's "punishment" for including children in his war on crime. Jason Todd, a former Boy Wonder, confirmed to be alive on  as a violent vigilante the Red Hood who waged a one-man war against Black Mask and successfully crippling his criminal operation in the city before seeking revenge towards Batman and the Joker. Finally, the citizens of Gotham City no longer consider Batman to be an urban legend (which has been in place since Zero Hour), as he was caught on camera trying to save the life of a wounded student at the end of Act One. Additionally, Barbara Gordon lost the clock tower that served as her home and headquarters and left Gotham City, eventually moving to Metropolis. She would later re-establish her ties to Batman.


Output: b


Input: Consider Input: Question: Who led the group that launched a major assault on Korenica and Udbina? Passage:From May, 1941, it was transferred to an occupation force in Croatia. The battles with Yugoslav Partisans of increasing intensity were fought in November–December 1941 at Štirovača forest, Divoselo (Croatia), and Žuta Lokva, resulting ultimately in the Battle of the Neretva. It was fought initially at Gospić, Otočac and Bihać. The Yugoslav Partisans has launched a major assault on Korenica and Udbina from 2 January until 15 January 1942. These attacks were fended off by division Re, and in February–March, 1942, it participated in the mopping-up operation in the same area. The culmination of Battle of the Neretva for division Re was the Operation K, between 23 – 28 March 1942, carried out over six days by the Italian V Corps. The objective was to break through to and relieve the surrounded garrisons in Titova Korenica, Udbina and Donji Lapac the operation was successful and the division suffered only light casualties. In April, 1942, the Yugoslav Partisans has launched an assault on Mogorić and Bihać. Pressure was such what he garrison of Bihać had to be evacuated in June, 1942. All lost positions were recovered by the end of June, 1942, after fierce fighting.



Output: a