Simplify the following text for a Grade 9 native English-speaking person.
Original: They were named after the Frisian Islands ( this was probably the Germans trying to show what would happen to Britain , as it were ) : Lager Norderney , Lager Borkum , Lager Sylt and Lager Helgoland .
Simplified: They were named after the Frisian Islands : Lager Norderney , Lager Borkum , Lager Sylt and Lager Helgoland .