Complex sentence: In 1967, he got second billing opposite Frank Sinatra in the movie'The Naked Runner', however his performance was not well received by the critics who accused him of overacting in his role as a British agent.
Split into simpler sentences: In 1967, he got second billing opposite Frank Sinatra in the movie'The Naked Runner'. However, his performance was not well received by critics who accused him of overacting in his role as a British agent.