Conversation so far:
What happened to the band Sepultura in 2006?
Sepultura's tenth album, Dante XXI, was released on March 14, 2006. It is a concept album based on Dante Alighieri's The Divine Comedy.
Who was Dante Alighieri the person in which Sepultura based their tenth album Dante XXI released in March 14, 2006?
Dante Alighieri was an Italian poet.

Question: Were they popular?
Self-contained rewrite: Was the band sepultura popular?