Complex sentence: While Hank is away, Peggy and Bobby attend a picnic where they discover that hamburgers cooked over charcoal taste better than ones made with propane, and they take advantage of Hank's absence to buy a charcoal grill.
Split into simpler sentences: While Hank is away, Peggy and Bobby attend a picnic where they discover that hamburgers cooked with charcoal taste better than ones made with propane. They take advantage of Hank's absence to buy a charcoal grill.