Complex sentence: In 1967, Gladstone received three major commissions for Montreal's Expo 67, but several years later he was struggling to find work, complaining that his work was misundertood by the Canada Council's arts bureaucracy, a complaint that would persist throughout his career.
Split into simpler sentences: In 1967, Gladstone received three major commissions for Montreal's Expo 67. Gladstone complained that his work was misundertood by the Canada Council's arts bureaucracy, a complaint that would persist throughout his career.