Complex sentence: Both Clara and the Doctor find a message reading "The Impossible Girl" in a newspaper, directing them to a restaurant where they reunite but learn that neither planted the message for the other, as they had both assumed.
Split into simpler sentences: Both Clara and the Doctor find a message reading "The Impossible Girl" in a newspaper, directing them to meet at a specific restaurant. They reunite, but learn that neither planted the message for the other, as they had both assumed.