Complex sentence: The circus bugs attempt to leave but are forced back when a bird attacks the group, and save Dot, Atta's younger sister, from the bird as they flee, gaining the ants' respect in the process.
Split into simpler sentences: The circus bugs attempt to leave but are forced back when a bird attacks the group. They save Dot, Atta's younger sister, from the bird as they flee, gaining the ants' respect in the process.