Complex sentence: Therefore, a gargoyle is not a hunkypunk because it serves to drain water through its mouth whereas some carved creatures found on churches, might look like a gargoyle but are not if the mouth cannot drain.
Split into simpler sentences: Therefore, a gargoyle is not a hunkypunk because it serves to drain water through its mouth. Some carved creatures found on churches might look like gargoyles, but are not if the mouth cannot drain.