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: Who refused Buyantu? 
 disfluent question: What did er who refused Buyantu? 
 context: The fourth Yuan emperor, Buyantu Khan (Ayurbarwada), was a competent emperor. He was the first Yuan emperor to actively support and adopt mainstream Chinese culture after the reign of Kublai, to the discontent of some Mongol elite. He had been mentored by Li Meng, a Confucian academic. He made many reforms, including the liquidation of the Department of State Affairs (Chinese: 尚書省), which resulted in the execution of five of the highest-ranking officials. Starting in 1313 the traditional imperial examinations were reintroduced for prospective officials, testing their knowledge on significant historical works. Also, he codified much of the law, as well as publishing or translating a number of Chinese books and works.

Ex Output:
None


Ex Input:
proper question: The Presiding Officer tries the achieve a balance between similar viewpoints and whom? 
 disfluent question: Who decides, or better yet, the Presiding Officer tries the achieve a balance between similar viewpoints and whom? 
 context: The Presiding Officer (or Deputy Presiding Officer) decides who speaks in chamber debates and the amount of time for which they are allowed to speak. Normally, the Presiding Officer tries to achieve a balance between different viewpoints and political parties when selecting members to speak. Typically, ministers or party leaders open debates, with opening speakers given between 5 and 20 minutes, and succeeding speakers allocated less time. The Presiding Officer can reduce speaking time if a large number of members wish to participate in the debate. Debate is more informal than in some parliamentary systems. Members may call each other directly by name, rather than by constituency or cabinet position, and hand clapping is allowed. Speeches to the chamber are normally delivered in English, but members may use Scots, Gaelic, or any other language with the agreement of the Presiding Officer. The Scottish Parliament has conducted debates in the Gaelic language.

Ex Output:
None


Ex Input:
proper question: Whose puppet did Islamists support the Saudi regime of being? 
 disfluent question: Whose president or no puppet did islamists support the Saudi regime of being? 
 context: Another factor in the early 1990s that worked to radicalize the Islamist movement was the Gulf War, which brought several hundred thousand US and allied non-Muslim military personnel to Saudi Arabian soil to put an end to Saddam Hussein's occupation of Kuwait. Prior to 1990 Saudi Arabia played an important role in restraining the many Islamist groups that received its aid. But when Saddam, secularist and Ba'athist dictator of neighboring Iraq, attacked Saudi Arabia (his enemy in the war), western troops came to protect the Saudi monarchy. Islamists accused the Saudi regime of being a puppet of the west.

Ex Output:

None