Canadian artist Stan Douglas uses free jazz as a direct response to complex attitudes towards African-American music. Exhibited at documenta 9 in 1992, his video installation "Hors-champs" (meaning "off-screen") addresses the political context of free jazz in the 1960s, as an extension of black consciousness and is one of his few works to directly address race. Four American musicians, George Lewis (trombone), Douglas Ewart (saxophone), Kent Carter (bass) and Oliver Johnson (drums) who lived in France during the free jazz period in the 1960s, improvise Albert Ayler's 1965 composition "Spirits Rejoice."