You will be given a definition of a task first, then some input of the task.
Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.

Horizontal zones or uh layers of what are pulled along a surface into a back stop in analog versions of organic wedge experiments?
Output:
Horizontal layers of what are pulled along a surface into a back stop in analog versions of orogenic wedge experiments?