Complex sentence: Pronk began displaying her talents at the age of six when she took up ballet but, by age 18, she became involved with the Dutch club scene, where she added vocalist and DJ duties to her resume.
Split into simpler sentences: Pronk began displaying her talents at the age of six when she took up ballet. By age 18, Pronk became involved with the Dutch club scene, where she added vocalist and DJ duties to her resume.