Complex sentence: Seo Eun-kwang (born November 22,1990), also simply known as "Eunkwang", is a South Korean singer, entertainer, and the leader and main vocalist of the South Korean boy group BtoB.
Split into simpler sentences: Seo Eun-kwang (born November 22,1990), is a South Korean singer, entertainer. He is a leader and main vocalist of the South Korean boy group BtoB.