Complex sentence: She made her television debut in 2004 while participating on SBS's "Superstar Survival" as a finalist, and in 2009, she made her career breakthrough as a regular cast on a variety show called "Invincible Youth".
Split into simpler sentences: She made her television debut in 2004 while participating on SBS's "Superstar Survival" as a finalist. In 2009, she made her career breakthrough as a regular cast on a variety show called "Invincible Youth".