Simplify the following text for a Grade 8 native English-speaking person.
Original: The libretto for The Seasons was provided to Haydn , just as with The Creation , by Baron Gottfried van Swieten , an Austrian nobleman who had also exercised an important influence on the career of Mozart .
Simplified: The libretto ( the words ) had been written by Baron Gottfried van Swieten who was an Austrian nobleman who liked music . He had helped Mozart in his career and now he was helping Haydn .