You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who is credited with saying markets can stay irrational longer than you can stay solvent?" whose answer is John Maynard Keynes.
Each document should contain about 30 words, and these documents should contain useful information.

Query: "markets can stay irrational longer than you can stay solvent" attribution
Useful Output:

Doc 1: As Keynes said in the 1930s: “Markets can stay irrational longer than you can stay solvent.” In 2007 an article in BusinessWeek credited
Doc 2: Keynes also said that the markets can stay irrational longer than you can stay solvent. I'm glad to see the attribution of that quote was correct - I
Doc 3:  Markets can stay irrational longer than you can stay solvent.” Doomberg mentioned it while discussing their view on the Inflation Reduction
Doc 4: Buffett concludes: “Markets can stay irrational longer than you can stay solvent.” (Hämäläinen & Oksaharju, 2016). Leverage constraints faced
Doc 5: More focused on mark to market downside as you don't control the process/market ("markets can stay irrational longer than you can stay solvent"