Complex sentence: He also wrote a notable pamphlet titled "Revolt Against the City," published in Iowa City in 1935, in which he asserted that American artists and buyers of art were no longer looking to Parisian culture for subject matter and style.
Split into simpler sentences: He also wrote a notable pamphlet titled "Revolt Against the City," published in Iowa City, 1935. In it he asserts that American artists and buyers of art were no longer looking to Parisian culture for subject matter and style.