Question: When was the South Korean singer, actor, host and entertainer born who was known as Ballad Prince and was also a star of Gu Family Book?
Sentence (from "Lee Seung-gi"): He has garnered further recognition as an actor with leading roles in popular dramas such as "Brilliant Legacy" (2009), "My Girlfriend Is a Nine-Tailed Fox" (2010), and "Gu Family Book" (2013).
Relevant evidence: No