Complex sentence: The clones are soon revealed to be much more stupid than the true Homer: when Ned Flanders asks if he can have his chainsaw back, one of the clones picks up the chainsaw and looks at Homer, who nods.
Split into simpler sentences: The clones are soon revealed to be much more stupid than the true Homer. When Ned Flanders asks if he can have his chainsaw back, one of the clones picks up the chainsaw and looks at Homer, who nods.