Question: What album, which included collaborators such as Switch, Diplo, and Richard X, was also featured in a concert tour supporting its artist's album, "Kala?"
Sentence (from "Arular"): The album's title is the political code name used by her father, Arul Pragasam, during his involvement with Sri Lankan Tamil militant groups, and themes of conflict and revolution feature heavily in the lyrics and artwork.
Relevant evidence: No