TASK DEFINITION: Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
PROBLEM: How many er which plateau is the left part of Vistula on?

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

PROBLEM: David Castlles-Quintana and Vicente Royuela do what for a hobby or I mean living?

SOLUTION: What do David Castlles-Quintana and Vicente Royuela do for a living?

PROBLEM: How is it or no rather where is it hard to identify the remains of salmon in?

SOLUTION:
Where is it hard to identify the remains of salmon in?