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

Q: What social problems no what nationality aren't researchers Richard G. Wilkinson and Kate Pickett?

A: What nationality aren't researchers Richard G. Wilkinson and Kate Pickett?
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Q: What was the philosophy no the huihui?

A: What was huihui?
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Q: When was the Treaty of Rhineland ah I mean of Versailles written?

A:
When was the Treaty of Versailles written?
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