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: How much time was between the periods? Passage:Prior to Nepal's unification, Srestha was a collective high-status title given to those Hindu clans referred to as 'Bhaju' (from Sanskrit bhadralok) who served as the key non-Brahmin class of ruling, administrative and merchant class of the Malla courts. From within this broad Srestha groups are two distinct caste groups. First, they count among them the high-caste aristocratic Kshatriyas, locally pronounced as Chathariya, who are descended from the nobles and courtiers of the Malla period and consist of the ruling, land-owning and literate Hindu caste group of the Nepal Mandala, which later formed the core of government bureaucracy during the Shah and Rana period. Second, Srestha title is also attributed to the Panchthariya, who now mostly write their surnames as 'Shrestha', who were historically the Hindu merchant clans of the Valley, as opposed to the Buddhist merchant caste of Uray. These Panchthariyas have Vaishya status in the traditional varna framework. Srestha group has also incorporated in it the socially upward Jyapu farmers and other peasants especially outside the Valley as a means of the Sanskritisation process, although their status is not accepted by the upper-level Srestha castes.

Example Output: a

Example Input: Question: Did Brown work longer as Director of player personnel for the Battlehawks or Vice President of Football Operations for the Iron? Passage:Theotis "Trey" Brown, III (born March 1, 1985) is a former American football cornerback who is currently the Director of Player Personnel for the St. Louis BattleHawks. Prior to being hired by the XFL, Brown served as the Executive Vice President of Football Operations for the Birmingham Iron of the Alliance of American Football. Prior to the AAF, Brown spent 9 years in the National Football League as a scout/executive. From 2010 to 2012, he was a scout with the New England Patriots. Then, from 2013 to 2018, he was with the Philadelphia Eagles in a variety of capacities including the Director of College Scouting from 2016-2018. As a player, he was signed by the Chicago Bears as an undrafted free agent in 2009. He played college football at UCLA. He also played for the New York Sentinels. He is the son of former NFL running back Theotis Brown.

Example Output: a

Example Input: Question: What is the location of the city where Markos first appears in the beginning of the 15th century? Passage:He first appears in Constantinople in 1401, qualified as an oikeios of the emperor. In 1417 he was possibly sent on a diplomatic mission to the Venetians in the Morea. In 1422 and again in 1429 he was sent by Emperor John VIII Palaiologos as an envoy to the Ottoman Sultan Murad II. At the time he had the relatively lowly rank of protovestiarites, but was quickly promoted to protostrator and then to the senior rank of megas stratopedarches, which he held already during his mission in 1430 to Pope Martin V. During his return from the mission to the Pope, on orders from the Emperor, he raised Thomas Palaiologos to the rank of Despot in the Morea. He led two more missions abroad, one in 1433 to Pope Eugene IV, and one in 1438 to Venice.

Example Output:
b