Complex sentence: Frishberg graduated early from Fair Lawn High School in New Jersey at the age of sixteen and then spent a little time in Vietnam for the Fleet Marine Force in 1964 as a machine-gunner, upon returning to New York University on a full scholarship.
Split into simpler sentences: Frishberg graduated early from Fair Lawn High School in New Jersey at the age of sixteen. He spent a little time in Vietnam for the Fleet Marine Force in 1964 as a machine-gunner, upon returning to New York University on a full scholarship.