Complex sentence: That same year, a director at IMP was unable to complete work on a small feature film, so in moment of bravado, Ince suggested to IMP's owner Laemmle of hiring him as a full-time director to complete the film.
Split into simpler sentences: That same year he discovered that a director at IMP was unable to complete work on a small feature film. In a moment of bravado, Ince suggested the idea to IMP's owner Laemmle of hiring him as a full-time director to complete the film.