Complex sentence: When his family moved to the U.S, he went to John Burroughs Middle School located in Los Angeles, CA, Parks Junior High School and Sunny Hills High School, both of which are located in Fullerton, California.
Split into simpler sentences: When his family moved to the U.S, he went to John Burroughs Middle School located in Los Angeles. Eric spent his years of high school at Parks Junior High School and Sunny Hills High School, both of which are located in Fullerton, California.