Input (grade 6): Tehran was the site of the Tehran Conference in 1943, attended by U.S. President Franklin D. Roosevelt, British Prime Minister Winston Churchill, and Soviet Premier Joseph Stalin.
Output (grade 9): The Tehran Conference (codenamed Eureka) was the meeting of Joseph Stalin, Franklin D. Roosevelt and Winston Churchill between November 28 and December 1, 1943, most of which was held at the Soviet Embassy in Tehran, Iran.