Complex sentence: Bosko sends the dog away, and then delivers an ice cream to Wilbur; however he dislikes the flavor Bosko delivered him, and rudely retaliates, which ends in Bosko sitting, surprised, in the washing basket with a pair of underwear on his head.
Split into simpler sentences: Bosko sends the dog away, and then delivers an ice cream to Wilbur. Wilbur dislikes the flavor Bosko delivered to him and rudely retaliates, which ends in Bosko sitting, surprised, in the washing basket with a pair of underwear on his head.