Complex sentence: Otis "Jet" Johnson, born and raised in Philadelphia, PA, graduated from Benjamin Franklin High School in 1951 where he was 1951 Philadelphia City Champion in the 100 yard dash and the 220 yard dash.
Split into simpler sentences: Otis "Jet" Johnson was born and raised in Philadelphia, PA. In 1951, he graduated from Benjamin Franklin High School, where he was 1951 Philadelphia City Champion in the 100 yard dash and the 220 yard dash.