Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
--------
Question: What is the the old north no the old south branch of the Rhine called?

Answer: What is the the old south branch of the Rhine called?

Question: How many er which plateau is the left part of Vistula on?

Answer: Which plateau is the left part of Vistula on?

Question: Who spread umm what was considered to be a major milestone?

Answer:
What was considered to be a major milestone?