 Complete the following phrase:  OSullivan won the proam Pink Ribbon tournament in July 2015, defeating Darryn Walker 42 in the final, but took a hiatus from the professional tour for almost eight months. He declined to defend his Champion of Champions and UK Championship titles, stating that he was suffering from debilitating insomnia, but he made his debut providing in-studio expert analysis during the UK Championship, alongside Jimmy White. He returned to professional competition in the qualifying rounds for the 