1a5f9918aSopenharmony_ci# Explicitly typed set. 2a5f9918aSopenharmony_cibaseball players: !!set 3a5f9918aSopenharmony_ci ? Mark McGwire 4a5f9918aSopenharmony_ci ? Sammy Sosa 5a5f9918aSopenharmony_ci ? Ken Griffey 6a5f9918aSopenharmony_ci# Flow style 7a5f9918aSopenharmony_cibaseball teams: !!set { Boston Red Sox, Detroit Tigers, New York Yankees } 8