 Complete the following phrase:  Rosenthals first exhibition at the Royal Academy in 1978, at the suggestion of Bryan Robertson, was on the American painter Robert Motherwell. It was followed by a major exhibition on Post-Impressionism in 197980, and in 1981 A New Spirit in Painting, an exhibition of neo-Expressionist painting co-curated with and Sir Nicholas Serota. Considered to be one of Rosenthals greatest achievements, this exhibition foregrounded the work of painters Georg Baselitz and Anselm Kiefer, and set the agenda for a return to painting in the early 1980s. In 1997, Rosenthal co-curated the very controversial exhibition 