Complex sentence: He debuted in the film "Socialphobia" (2015) and started gaining recognition through his role in the Korean drama "Reply 1988" (2015), a third installment of the "Reply" series by tvN (Korean Cable TV channel).
Split into simpler sentences: He debuted in the film "Socialphobia" (2015). He started gaining recognition through his role in the Korean drama "Reply 1988" (2015), a third installment of the "Reply" series by tvN (Korean Cable TV channel).