Janis Joplin and her band played on a stage in 1967 which ultimately catapulted her to popularity and fame. What was the name of the festival where Janis and her group had their breakthrough performance?  

"Mandela, Cell Dweller,
Thatcher, you can tell her
clear the way for the prophets of rage"
are a few lyrics on the album, "It Takes a Nation of Millions to Hold Us Back". Can you name the band who recorded that album?   image   instructions