Chun Myung-hoon (born April 6, 1978) is a South Korean singer, rapper, actor and television presenter. He was a member of boy band NRG. He released his single, "Welcome To The Jungle" on October 19, 2012. He is well known for a cast member on several TV shows include "Girl Spirit". Using only the above description and what you know about the world, ""Welcome To The Jungle" was not released as a single by NRG in 2012." is definitely correct, incorrect, or inconclusive? 