instruction:
Convert a disfluent question to a proper question. 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.
question:
The abolition of the Ottoman Caliphate is believed to have started what colonial power I mean system?
answer:
The abolition of the Ottoman Caliphate is believed to have started what system?


question:
Who proposes that the general election no scratch that who proposes that the date of the poll never varies?
answer:
Who proposes the date of the poll not be varied?


question:
How is er what are refineries often called?
answer:

What are refineries often called?