Complex sentence: Meriden and New Britain in central Connecticut, westward to Danbury and the surrounding Housatonic Valley, encompassing the Farmington Valley, Naugatuck River Valley, and the Litchfield Hills.
Split into simpler sentences: Meriden and New Britain in central Connecticut, westward to Danbury and the surrounding Housatonic Valley. Encompased in between are the Farmington Valley, Naugatuck River Valley, and the Litchfield Hills.