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: Why did the Nok culture die off about 200 AD on the Jos Plateau? Passage:The Nok culture thrived from approximately 1,500 BC to about 200 AD on the Jos Plateau in north and central Nigeria and produced life-sized terracotta figures that include human heads, human figures, and animals. Iron smelting furnaces at Taruga, a Nok site, date from around 600 BC. The Nok culture is thought to have begun smelting iron by 600-500 BC and possibly some centuries earlier. Kainji Dam excavations revealed iron-working by the 2nd century BC. Evidence of iron smelting has also been excavated at sites in the Nsukka region of southeast Nigeria in what is now Igboland: dating to 2,000 BC at the site of Lejja (Uzomaka 2009) and to 750 BC and at the site of Opi (Holl 2009). The transition from Neolithic times to the Iron Age apparently was achieved indigenously without intermediate bronze production. Others have suggested that the technology moved west from the Nile Valley, although the Iron Age in the Niger River valley and the forest region appears to predate the introduction of metallurgy in the upper savanna by more than 800 years. The earliest iron technology in West Africa has also been found to be contemporary with or predate that of the Nile valley and North Africa, and some archaeologists believe that iron metallurgy was likely developed independently in sub-Saharan West Africa.

Example Output: b

Example Input: Question: When did the Sassanids replace the Parthians? Passage:In 270 the Roman emperor Aurelian engaged the Sassanids, who had now replaced the Parthians, on the eastern front and he was able to drive them back. Tiridates, as the true heir to the now Persian-occupied Armenian throne, came to Armenia and quickly raised an army and drove the enemy out in 287. When Tiridates returned to Armenia, he made the city of Vagharshapat his capital, as it had been the capital of his late father. For a while, fortune appeared to favour Tiridates. He not only expelled his enemies, but he carried his arms into Assyria. At the time the Persian Empire was in a distracted state. The throne was disputed by the ambition of two contending brothers, Hormuz and Narses. The civil war was, however, soon terminated and Narses was universally acknowledged as King of Persia. Narses then directed his whole force against the foreign enemy. The contest then became too unequal. Tiridates once more took refuge with the Romans. The Roman-Armenian alliance grew stronger, especially while Diocletian ruled the empire. This can be attributed to the upbringing of Tiridates, the consistent Persian aggressions and the murder of his father by Anak. With Diocletian's help, Tiridates pushed the Persians out of Armenia. In 299, Diocletian left the Armenian state in a quasi-independent and protectorate status possibly to use it as a buffer in case of a Persian attack. Tiridates married an Alani Princess called Ashkhen in 297 by whom he had three children: a son called Khosrov III, a daughter called Salome and an unnamed daughter who married St. Husik I, one of the earlier Catholicoi of the Armenian Apostolic Church.

Example Output: b

Example Input: Question: Which of the two clubs that Pierre attracted interest from in October 2013 was founded earlier? Passage:Pierre was born in Southall, London. He started his career in the youth system at Fulham, but was released in 2011. Pierre (along with former Fulham youth teammates Jonathan Cosgrove, Albert Owusu-Ansah and Michael Kamau) joined League One side Brentford on trial in April 2011 and was the only one of the four to earn a contract. Pierre was made part of the Development Squad for its inaugural season in 2011–12. He made his professional debut for the Bees on 4 December 2012, in a 2–1 defeat to Southend United in the Football League Trophy, coming on as a substitute for Jake Bidwell. Pierre was an unused substitute on four further occasions during the 2012–13 season. Towards the end of the campaign, Pierre spent a period training with Brentford's Icelandic partner club UMF Selfoss. Pierre was the leading appearance-maker for the Development Squad in the 2012–13 season, making 19 starts and scoring two goals, in addition to his solitary first team appearance. On 20 June 2013, he signed a new one-year contract which will tie him to the club until the summer of 2014. He made his first appearance of the 2013–14 season on 27 August 2013, coming on at half time for Scott Barron in a 5–0 League Cup defeat away at Derby County. His second appearance came in a 5–3 Football League Trophy first round win over AFC Wimbledon the following week, again replacing Scott Barron at half time. Pierre was made available for loan in October 2013 and attracted interest from Conference Premier clubs Aldershot Town and Cambridge United. Pierre was again made available for loan in February 2014, but expressed a desire to open talks over a new contract the following month. Though he spent portions of the 2013–14 season out on loan, Pierre finished the campaign with two first team appearances and 12 Development Squad appearances. In early May, it was reported that Pierre had been offered a new contract, after impressing in his loan spells away from Griffin Park during the 2013–14 season. On 16 May, it was reported that Pierre turned down the contract offer and left the club. He made three first team appearances during his three years with the Bees.

Example Output:
b