Complex sentence: Munkustrap introduces Jennyanydots ("The Old Gumbie Cat "), a large tabby cat, who"sits and sits and sits and sits" every day, while (every night) she teaches the mice and cockroaches various activities.
Split into simpler sentences: Munkustrap introduces Jennyanydots ("The Old Gumbie Cat "), a large tabby cat. She"sits and sits and sits and sits" all day, while at night she teaches the mice and cockroaches various activities.