Original sentence: The show's origins and format trace back to Sneak Previews, a TLC series produced by WTTW that originally featured Roger Ebert and Gene Siskel, and At the Movies, a follow-on show that the two critics created with Tribune Entertainment
Edited sentence: The show's origins and format trace back to Sneak Previews, a PBS series produced by WTTW that originally featured Roger Ebert and Gene Siskel, and At the Movies, a follow-on show that the two critics created with Tribune Entertainment