source: Since his actual date of birth was not recorded, it is believed to be between 1935-1939
target: His real date of birth was never recorded, but it will be a date between 1935 and 1939.
references: His real date of birth was never recorded, but it will be a date between 1935 and 1939. His actual birth date is unknown, but he was believed to be born between 1935 and 1939. His date of birth was never recorded, but it is believed to be between 1935 and 1939. His real birthday was unknown but it is believed to be between 1935 and 1939 No one knows when he was born because no one wrote it down, but his birth date is thought to be between 1935 and 1939. His real date of birth not recorded, but it is considered true to be a date between 1935 and 1939 His real birthday is unknown, but is thought to be between 1935 and 1939.