He might not be a household name but the Austrian Heimo Zobernig is regarded as one of the most significant European artists working today. For his new show at Tate St Ives Zobernig not only shows his own work, but is also let loose with the Tate Collection, curating an idiosyncratic selection including works by Pablo Picasso, Barbara Hepworth, Marcel Duchamp and many more. Creative Director of Tate St Ives Martin Clark gave us a tour of the show and explains his choices.