Complex sentence: In September 1991, the block was rebranded as the Fox Kids Network, with its programming expanding to 90 minutes on weekdays and four hours on Saturday mornings; the weekday editions of the block grew to 2½ hours the following year.
Split into simpler sentences: In September 1991, the block was rebranded as the Fox Kids Network, with its programming expanding to 90 minutes on weekdays and 4 hours on Saturday mornings. The weekday editions of the block grew to 2½ hours the following year.