According to biographer Marc Eliot, Davis was "offended by what he perceived as their lack of gratitude for what he believed was his role in turning them into superstars". Rather than implement Davis' plan, Simon & Garfunkel signed a contract extension with Columbia that guaranteed them a higher royalty rate. At the 1969 Grammy Awards, the lead single "Mrs. Robinson" became the first rock and roll song to receive Record of the Year, and also won Best Contemporary Pop Performance by a Duo or Group. 1969–1970: Growing apart and final album Bookends, alongside the Graduate soundtrack, made Simon & Garfunkel the biggest rock duo in the world. Simon was approached by producers to write music for films or license songs; he turned down Franco Zeffirelli, who was preparing to film Brother Sun, Sister Moon, and John Schlesinger, who was preparing to film Midnight Cowboy. In addition to Hollywood proposals, Simon declined a request by producers from the Broadway show Jimmy Shine (starring Simon's friend Dustin Hoffman, also the lead in Midnight Cowboy). He collaborated briefly with Leonard Bernstein on a sacred mass before withdrawing from the project due to "finding it perhaps too far afield from his comfort zone". Garfunkel began acting, and played Captain Nately in the Nichols film Catch-22 (1970). Simon was to play the character of Dunbar, but screenwriter Buck Henry felt the film was already crowded with characters and wrote Simon's part out. Filming began in January 1969 and lasted about eight months, longer than expected. The production endangered the duo's relationship; Simon had completed no new songs, and the duo planned to collaborate after filming ended. Following the end of filming in October, the first performance of what was planned to be their last tour took place in Ames, Iowa. The US leg of the tour ended in the sold-out Carnegie Hall on November 27. Meanwhile, the duo, working with director Charles Grodin, produced an hourlong CBS special, Songs of America, a mixture of scenes featuring notable political events and leaders concerning the US, such as the Vietnam War, Martin Luther King Jr., John F. Kennedy's funeral procession, Cesar Chavez and the Poor People's March. It was broadcast only once, due to tension at the network regarding its content. The BBC said that "one million viewers responded by turning the dial and watching the figure skating on NBC instead." Bridge over Troubled Water, Simon &