Use a disfluent question or a proper question and find the answer to the question based on the given context or return None if an answer can't be found. A disfluent question is a question that has some interruptions in it while framing. A proper question is the correct form of the question without any disfluency.

Ex Input:
proper question: What type of practices did the Yuan introduce in government? 
 disfluent question: What religion or oh what type of practices did the Yuan introduce in government? 
 context: Western musical instruments were introduced to enrich Chinese performing arts. From this period dates the conversion to Islam, by Muslims of Central Asia, of growing numbers of Chinese in the northwest and southwest. Nestorianism and Roman Catholicism also enjoyed a period of toleration. Buddhism (especially Tibetan Buddhism) flourished, although Taoism endured certain persecutions in favor of Buddhism from the Yuan government. Confucian governmental practices and examinations based on the Classics, which had fallen into disuse in north China during the period of disunity, were reinstated by the Yuan court, probably in the hope of maintaining order over Han society. Advances were realized in the fields of travel literature, cartography, geography, and scientific education.

Ex Output:
None


Ex Input:
proper question: What was the population density in 1970? 
 disfluent question: What racial group  no What was the population density in 1970? 
 context: The 2010 United States Census reported that Fresno had a population of 494,665. The population density was 4,404.5 people per square mile (1,700.6/km²). The racial makeup of Fresno was 245,306 (49.6%) White, 40,960 (8.3%) African American, 8,525 (1.7%) Native American, 62,528 (12.6%) Asian (3.6% Hmong, 1.7% Indian, 1.2% Filipino, 1.2% Laotian, 1.0% Thai, 0.8% Cambodian, 0.7% Chinese, 0.5% Japanese, 0.4% Vietnamese, 0.2% Korean), 849 (0.2%) Pacific Islander, 111,984 (22.6%) from other races, and 24,513 (5.0%) from two or more races. Hispanic or Latino of any race were 232,055 persons (46.9%). Among the Hispanic population, 42.7% of the total population are Mexican, 0.4% Salvadoran, and 0.4% Puerto Rican. Non-Hispanic Whites were 30.0% of the population in 2010, down from 72.6% in 1970.

Ex Output:
None


Ex Input:
proper question: What is the number of Constituency MSPs? 
 disfluent question: How many members, well actually, what is the number of Constituency MSPs? 
 context: Of the 129 MSPs, 73 are elected to represent first past the post constituencies and are known as Constituency MSPs. Voters choose one member to represent the constituency, and the member with most votes is returned as a constituency MSP. The 73 Scottish Parliament constituencies shared the same boundaries as the UK Parliament constituencies in Scotland, prior to the 2005 reduction in the number of Scottish MPs, with the exception of Orkney and Shetland which each return their own constituency MSP. Currently, the average Scottish Parliament constituency comprises 55,000 electors. Given the geographical distribution of population in Scotland, this results in constituencies of a smaller area in the Central Lowlands, where the bulk of Scotland's population live, and much larger constituency areas in the north and west of the country, which have a low population density. The island archipelagos of Orkney, Shetland and the Western Isles comprise a much smaller number of electors, due to their dispersed population and distance from the Scottish Parliament in Edinburgh. If a Constituency MSP resigns from Parliament, this triggers a by-election in his or her constituency, where a replacement MSP is returned from one of the parties by the plurality system.

Ex Output:

73