<prompt> Kalima dǝga tǝmzǝyin: Hollenstein dǝ Switzerlands U20 national team ro bowotǝ  <response>: 2019 World Junior Championships lan Canada lan. Shiye Switzerlanda na kən diyaume ro suwudə, Finland ro lejin suro semifinalen. Hollenstein dǝ waltǝ lamar jamibe World Junior Championships 2020ye Czech Republic lan. 