Complex sentence: On June 13,2013, the group performed an OST for the game'Dragon Nest' titled "Here We Go", and on October 1,2013, they released their third single, "Miss You".
Split into simpler sentences: On June 13,2013, the group performed an OST for the game'Dragon Nest' titled "Here We Go". On October 1,2013, the group released their third single, "Miss You".