Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.

How many avulsions have occurred in upland areas or actually just the past 6000 years?
How many avulsions have occurred in the past 6000 yeas?

What is the name of the university's concert no um the summer festival?
What is the name of the university's summer festival?

What is the delta in the Rhine delimited in the oh really in local Alemannic dialect, what is the the singular form of the names of the islands formed by the Rhine?
In local Alemannic dialect, what is the the singular form of the names of the islands formed by the Rhine?