Complex sentence: Szilárd letter was a letter sent to the United States President Franklin D. Roosevelt on August 2,1939, that was signed by Albert Einstein but largely written by Leó Szilárd in consultation with fellow Hungarian physicists Edward Teller and Eugene Wigner.
Split into simpler sentences: Szilárd letter was a letter sent to the United States President Franklin D. Roosevelt on August 2,1939, that was signed by Albert Einstein. However, the letter was largely written by Leó Szilárd in consultation with fellow Hungarian physicists Edward Teller and Eugene Wigner.