Specifically, IAM incorporates many African-related themes into its music. Their 1991 song "Les tam-tam de l'Afrique" was one of the first French rap hits to deal explicitly with slavery. This particular track "focused on the plunder of Africa, the abduction of its inhabitants, the Middle Passage, and the plantation system in the Americas." It uses a sample from a Stevie Wonder song called "Past Time Paradise", which, appropriately, touches on race relations and slavery as well. Many other French hip hop artists made similar statements through their music, by collaborating to celebrate the 150th anniversary of the abolition of slavery in France in 1998. In order to mark the anniversary of the abolition of slavery in Martinique (which is an overseas department of France in the Caribbean), on May 22, Paris's Olympia theater hosted a concert that opened with "drummers chained together" and featured performances from "rappers of African descent such as Doc Gyneco, Stomy Bugsy, Arsenik, and Hamed Daye."