Complex sentence: However, after reading more about vaccination from the internet, they decide against it, much to Brian's objections as he meNtions the potential risks, but Peter and Lois ignore him and decide to rally Quahog to ban vaccination.
Split into simpler sentences: However, after reading more about vaccination from the internet, they decide against it. Brian objects as he mentions the potential risks, but Peter and Lois ignore him and decide to rally Quahog to ban vaccination.