Complex sentence: Traveling to Canada to see her, she gives them both credit along with her own explanation but after Brian heads to use the restroom, Anne tells Stewie that the late Gene MacLellan would've known more, since he wrote the song.
Split into simpler sentences: Traveling to Canada to see her, she gives them both credit along with her own explanation. But after Brian heads to use the restroom, Anne tells Stewie that the late Gene MacLellan would've known more since he wrote the song.