Complex sentence: A wild child, she ran away from home for the first time at age 14; at 15, she worked at a Guam massage parlor; at 18 she began dancing nude at the Mitchell Brothers O'Farrell Theatre in San Francisco.
Split into simpler sentences: A wild child, she ran away from home for the first time at age 14. By age 18 she was working as a stripper at the Mitchell Brothers O'Farrell Theatre in San Francisco.