Question: When was the South Korean musician, singer-songwriter, record producer and actor who was the most notable front man of the band that sang 2gether born? 
Sentence (from "Jung Yong-hwa"): Jung made his television debut in "You're Beautiful" (2009), and has since starred in television dramas "Heartstrings" (2011), "Marry Him If You Dare" (2013) and "The Three Musketeers" (2014).
Relevant evidence: No