Complex sentence: He travelled to Timaru, New Zealand in 1975 as an exchange student, where he attended Timaru Boys' High School; he graduated from North Allegheny High School in Wexford, Pennsylvania the following year.
Split into simpler sentences: He travelled to Timaru, New Zealand in 1975 as an exchange student. He graduated from North Allegheny High School in Wexford, Pennsylvania the following year.