Lubaina Himid won the prize in 2017 and has shows planned all over Europe this year. “All were programmed before the prize was announced, but Ms. Himid is now using her enhanced clout to request that galleries showing her work reach out to black artists living and working nearby and include them in events like talks and debates that run with the exhibitions. If curators say there are no black artists working in their region, as Ms. Himid said they often do, she provides them with names drawn from an extensive network she has built up over many years.”