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.

Input: Consider Input: proper question: What kind of rock did the hero Siegfried discover? 
 disfluent question: What kind of tribe er rock did the hero Siegfried discover? 
 context: Germanic tribes crossed the Rhine in the Migration period, by the 5th century establishing the kingdoms of Francia on the Lower Rhine, Burgundy on the Upper Rhine and Alemannia on the High Rhine. This Germanic Heroic Age is reflected in medieval legend, such as the Nibelungenlied which tells of the hero Siegfried killing a dragon on the Drachenfels (Siebengebirge) (dragons rock), near Bonn at the Rhine and of the Burgundians and their court at Worms, at the Rhine and Kriemhild's golden treasure, which was thrown into the Rhine by Hagen.

Output: None


Input: Consider Input: proper question: When is the Members Debate held? 
 disfluent question: What is the or rather when is Members Debate held? 
 context: Immediately after Decision Time a Members Debate is held, which lasts for 45 minutes. Members Business is a debate on a motion proposed by an MSP who is not a Scottish minister. Such motions are on issues which may be of interest to a particular area such as a member's own constituency, an upcoming or past event or any other item which would otherwise not be accorded official parliamentary time. As well as the proposer, other members normally contribute to the debate. The relevant minister, whose department the debate and motion relate to winds up the debate by speaking after all other participants.

Output: Immediately after Decision Time


Input: Consider Input: proper question: What theory of immunity is no longer influential? 
 disfluent question: What theory of self, oopsie, theory of immunity is no longer influential? 
 context: In the mid-1950s, Frank Burnet, inspired by a suggestion made by Niels Jerne, formulated the clonal selection theory (CST) of immunity. On the basis of CST, Burnet developed a theory of how an immune response is triggered according to the self/nonself distinction: self constituents (constituents of the body) do not trigger destructive immune responses, while nonself entities (pathogens, an allograft) trigger a destructive immune response. The theory was later modified to reflect new discoveries regarding histocompatibility or the complex two-signal activation of T cells. The self/nonself theory of immunity and the self/nonself vocabulary have been criticized, but remain very influential.


Output: None