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

At which or no rather what time did a river system develop in the Upper Rhine Graben?
What time did a river system develop in the Upper Rhine Graben?

What does Frame Relay's protocols provide no when was it used at UNI?
When was Frame Relay's protocols used at UNI?

When did King, oh sorry, General Sejm make Vilnius its permanent seat?
When did General Sejm make Vilnius its permanent seat?