Task: Question Generation
Input (English): Context : Alicia Witt and Dedee Pfeiffer co-starred as Sheridan's daughters, with Alan Rosenberg and Tom Wopat playing their respective fathers, while Christine Baranski appeared as Cybill's hard-drinking friend Maryann. 
Subject : Cybill 
Relation : original network
Output (English): On what channel did Cybill first air?