Complex sentence: He devoted himself exclusively to a study of California and begins a cycle that will be the subject of several exhibitions, the first of the series in July 2007, at the Photography Museum of Amsterdam, Foam, under the name "Young American".
Split into simpler sentences: He devoted himself exclusively to a study of California and began a cycle that will be the subject of several exhibitions. The first of the series was in July 2007, at the Photography Museum of Amsterdam, Foam, under the name "Young American".