instruction:
Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
question:
What is one aspect of the hydrography of the former stream urgh delta characterized by?
answer:
What is one aspect of the hydrography of the former delta characterized by?

question:
When was the plague no who fought in the great Northern war?
answer:
Who fought in the great Northern war?

question:
What was sold to foreign DATAPAC, sorry to foreign PTTs?
answer:
What was sold to foreign PTTs?