Simplify the following text for a Grade 5 native English-speaking person.
Original: Salamis holds a prominent place in The Persians , his oldest surviving play , which was performed in 472 BC and won first prize at the Dionysia .
Simplified: His oldest surviving play The Persians , performed in 472 BC , is set during the Battle of Salamis . This play won first prize at the Dionysia .