Complex sentence: At the close of the Telethon at the National Stadium, the group Los Prisioneros was introduced, who changed the lyrics of the song "Quieren Dinero" (They want money).
Split into simpler sentences: At the close of the Telethon at the National Stadium, the group Los Prisioneros were introduced. They changed the lyrics of the song "Quieren Dinero" (Eng.: They want money).