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

[Q]: David Castlles-Quintana and Vicente Royuela do what for a hobby or I mean living?
[A]: What do David Castlles-Quintana and Vicente Royuela do for a living?


[Q]: How many streetcars did the Fresno Traction Company operate in 1885 no 1931?
[A]: How many streetcars did the Fresno Traction Company operate in 1931?


[Q]: Who concluded that or instead what year is average CO2 levels expected to increase by 90%?
[A]:
What year is average CO2 levels expected to increase by 90%?