Artist William Villalongo and data scientist Shraddha Ramani will discuss their ongoing collaboration “Printing Black America: W.E.B. Du Bois’s Data Portraits in the 21st Century” Oct. 24 at Washington University in St. Louis. As the Sam Fox School’s 2023-24 Arthur and Sheila Prensky Island Press Visiting Artists, the pair will create new works for the series based on St. Louis.