Simplify the following text for a Grade 10 native English-speaking person.
Original: The following year , the Italian Grand Prix returned to Monza , and Imola hosted the newly-launched San Marino Grand Prix , named after the nearby republic of San Marino .
Simplified: In 1981 the Italian Grand Prix returned to Monza , and Imola hosted the new San Marino Grand Prix , named after the nearby republic of San Marino .