Complex sentence: The Seton Legacy Project has organized a major exhibition on Seton opening at the New Mexico History Museum on May 23,2010, the catalog published as "Ernest Thompson Seton, the Life and Legacy of an Artist and Conservationist" by David L. Witt.
Split into simpler sentences: The Seton Legacy Project has organized a major exhibition on Seton opening at the New Mexico History Museum on May 23,2010. The show will be accompanied by a catalog titled, Ernest Thompson Seton, the Life and Legacy of an Artist and Conservationist by David L. Witt.