Complex sentence: At a birthday concert in 2007, she revealed her true birth date, June 2,1902, thereby making her 107 years old when she died on May 13,2010, three weeks short of her 108th birthday.
Split into simpler sentences: At a birthday concert in 2007, she revealed her true birth date, June 2,1902. She was 107 years old when she died on May 13,2010, three weeks short of her 108th birthday.