A、The bands participated in the concert for economic benefits. B、All attendees were in red in the event. C、The concert conducted

As many as a million Cubans are said to have attended the free concert in Havana’s revolution square that featured some of the Latin America’s most popular musicians. Many in the crowd came dress in white to symbolize peace. The 5-hour event included the bands from seven countries, it was organized by the Miami base Colombian rock star Wallace.
    "This concert is just about peace, is just about possibility to get together, you know, through music, through art. And this particular case of Cuba have isolated from the rest of community for many years, just because of political belief. So we just want to come here and saying well, we are here, we are the same. So that is the reason why we are here to promote peace."
3. What is the theme of the concert?
4. What can we learn about the concert?