<prompt> Pedzisa mutsara unotevera: Shields akakodzera kumitambo yeOlympic yezhizha ya2020 muTokyo, Japan, mu  <response>: 100 metres butterfly uye 4x100 metres medley relay. Yakanga iri yechipiri yakateedzana Mitambo yeOlympic Shields yakakodzera kukwikwidza. 