South African artist Moshekwa Langa says he's frequently asked a stupid question: "Where is Africa in your work?" Now a resident of Amsterdam, Langa explores the "poetic aspects of expatriation" with a wide variety of materials--drawings, video, maps, bubble wrap, masking tape, cigarette butts, magazine advertisements. Refusing to be classified, the 24-year-old Langa says, "I want to show that there are multiple forms of influence and that I and other African artists meander and incorporate different forms." His new show at the Renaissance Society is part of "Cry of My Birth," a series of lectures, exhibits, and residencies by five contemporary African artists. Langa speaks Sunday at 5 during the opening of his exhibit at the Renaissance Society in the University of Chicago's Cobb Hall, 5811 S. Ellis (773-702-8670). For information on other talks in the series, see the Section Two art listings, or call 312-443-3711.