Complex sentence: The South Carolina Exposition and Protest, also known as Calhoun's Exposition, was written in 1828 by John C. Calhoun, the Vice President of the United States under John Quincy Adams.
Split into simpler sentences: The South Carolina Exposition and Protest, also known as Calhoun's Exposition, was written in 1828 by John C. Calhoun. In 1828, Calhoun was Vice President of the United States under John Quincy Adams.