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

Which sea was formed no was oil discovered in?
Which sea was oil discovered in?

What did the American Philosophical Society do with the memoir what did they produce in 1809?
What did the American Philosophical Society produce in 1809?

When was the Riemann hypothesis roughly stated that the asymptotic distribution of primes oh scratch that proposed?
When was the Riemann hypothesis proposed?