What two musical activities are represented in the two paragraphs?
Cór Cois Abhann: Cór Cois Abhann (] , meaning "Riverside Choir") is an independent mixed voice choir based in Cork City Ireland. Polovtsian Dances: The Polovtsian Dances, or Polovetsian Dances (Russian: Половецкие пляски, "Polovetskie plyaski" from the Russian "Polovtsy"—the name given to the Kipchaks and Cumans by the Rus' people) form an exotic scene at the end of Act II of Alexander Borodin's opera "Prince Igor".
Polovetsian Dances