Complex sentence: Reagan's family briefly lived in several towns and cities in Illinois, including Monmouth, Galesburg, and Chicago, in 1919, they returned to Tampico and lived above the H. C. Pitney Variety Store until finally settling in Dixon.
Split into simpler sentences: Reagan's family briefly lived in several towns and cities in Illinois, including Monmouth, Galesburg, and Chicago. In 1919, they returned to Tampico and lived above the H. C. Pitney Variety Store until finally settling in Dixon.