Complex sentence: Yoon Sang-hyun (born on September 21,1973) is a South Korean actor and singer, best known for his roles in "Queen of Housewives" and "Secret Garden".
Split into simpler sentences: Yoon Sang-hyun (born on September 21,1973) is a South Korean actor and singer. He is best known for his roles in "Queen of Housewives" and "Secret Garden".