Complex sentence: His second film was "Dum" (2003), which loosely based on Jagannadh's 2002 Kannada film Appu starring Puneet Rajkumar, had mixed reviews but a good run at the theatres.
Split into simpler sentences: His second film was "Dum" (2003), which was loosely based on Jagannadh's 2002 Kannada film "Appu", starring Puneet Rajkumar. It had mixed reviews but a good run at the theatres.