Complex sentence: In 1991, Plainview-Old Bethpage High School and John F. Kennedy High School were merged into the John F. Kennedy High School building and renamed Plainview-Old Bethpage John F. Kennedy High School.
Split into simpler sentences: In 1991, Plainview-Old Bethpage High School and John F. Kennedy High School were merged into the John F. Kennedy High School building. The school was renamed Plainview-Old Bethpage John F. Kennedy High School.