Instructions: 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.
Input: What is the oldest known rock in the world no sorry what has happened to the the rock in the Grand Canyon that is the oldest rock in the world?
Output:
What has happened to the the rock in the Grand Canyon that is the oldest rock in the world?