Complex sentence: Lutu moved to Spirit Lake, Iowa, to attend an extra year of high school as part of the cultural exchange, where stayed at the home of Berkley and Elinor Bedell and their family.
Split into simpler sentences: Lutu moved to Spirit Lake, Iowa, to attend an extra year of high school as part of the cultural exchange. While in Iowa, he stayed at the home of Berkley and Elinor Bedell and their family.