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 was born in an earlier year, Ivan Fesenko or Alexander Gelfond?" whose answer is Alexander Osipovich Gelfond.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Ivan Fesenko birth year
Useful Output:

Doc 1: Ivan Fesenko was the winner of 1979 all-Russian mathematical Olympiad of last year of high school students. He got his PhD in 1987 in Petersburg
Doc 2: 个人简介. Ivan Fesenko博士是1979年全俄高中数学奥林匹克竞赛冠军。1987年在俄罗斯彼得堡国立大学获得博士学位。1992年获得彼得堡数学学会奖（Prize
Doc 3: Ivan Fesenko (Russian born 1962) is a mathematician working in number theory and other areas of modern mathematics. Ivan Fesenko was the
Doc 4: Having 14 years of International academic and work experience in Hotel Management, Hospitality and Luxury Travel Design in Scandinavia I very much looking
Doc 5: Ivan Borisovich Fesenko, MathSciNet, Ph.D. St. Petersburg State University 1987 Russia, Dissertation: Explicit Constructions in Local Class Field Theory.