Complex sentence: Son of actor Mammootty, Dulquer made his debut with the Malayalam film "Second Show" (2012) and later starred in the film "Ustad Hotel" (2012) which won the National Award for Best Popular Film.
Split into simpler sentences: Son of actor Mammootty, Dulquer made his debut with the Malayalam film "Second Show" (2012). He starred next in the film "Ustad Hotel" (2012) which won the National Award for Best Popular Film.