_:B1bb711fe237608d2994ef427821e678f . "Roland" . "Siegwart" . "Roland Siegwart" . . . . "Siegwart, Roland" . . _:B1bb711fe237608d2994ef427821e678f . _:B1bb711fe237608d2994ef427821e678f . _:B1bb711fe237608d2994ef427821e678f "2023-05-20"^^ . _:B1bb711fe237608d2994ef427821e678f . _:B1bb711fe237608d2994ef427821e678f . _:B1bb711fe237608d2994ef427821e678f "321612140" . _:B1bb711fe237608d2994ef427821e678f . _:B1bb711fe237608d2994ef427821e678f . _:B1bb711fe237608d2994ef427821e678f .