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.
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Question: proper question: What was the topic of the error?
disfluent question: Who or rather what was the topic of the error?
context: Former IPCC chairman Robert Watson has said The mistakes all appear to have gone in the direction of making it seem like climate change is more serious by overstating the impact. That is worrying. The IPCC needs to look at this trend in the errors and ask why it happened. Martin Parry, a climate expert who had been co-chair of the IPCC working group II, said that What began with a single unfortunate error over Himalayan glaciers has become a clamour without substance and the IPCC had investigated the other alleged mistakes, which were generally unfounded and also marginal to the assessment.

Answer: Himalayan glaciers

Question: proper question: Parliament elects a second minister from whom?
disfluent question: Parliament elects a junior minister no the second minister from whom?
context: The party, or parties, that hold the majority of seats in the Parliament forms the Scottish Government. In contrast to many other parliamentary systems, Parliament elects a First Minister from a number of candidates at the beginning of each parliamentary term (after a general election). Any member can put their name forward to be First Minister, and a vote is taken by all members of Parliament. Normally, the leader of the largest party is returned as First Minister, and head of the Scottish Government. Theoretically, Parliament also elects the Scottish Ministers who form the government of Scotland and sit in the Scottish cabinet, but such ministers are, in practice, appointed to their roles by the First Minister. Junior ministers, who do not attend cabinet, are also appointed to assist Scottish ministers in their departments. Most ministers and their juniors are drawn from amongst the elected MSPs, with the exception of Scotland's Chief Law Officers: the Lord Advocate and the Solicitor General. Whilst the First Minister chooses the ministers and may decide to remove them at any time the formal appointment or dismissal is made by the Sovereign.

Answer: None

Question: proper question: What are the three building subsectors?
disfluent question: Which are or no rather what are the three building subsectors?
context: The Standard Industrial Classification and the newer North American Industry Classification System have a classification system for companies that perform or otherwise engage in construction. To recognize the differences of companies in this sector, it is divided into three subsectors: building construction, heavy and civil engineering construction, and specialty trade contractors. There are also categories for construction service firms (e.g., engineering, architecture) and construction managers (firms engaged in managing construction projects without assuming direct financial responsibility for completion of the construction project).

Answer:
None