Simplify the following text for a Grade 9 native English-speaking person.
Original: He worked with many famous people including the composers Witold LutosÅ awski and GyÃ rgy KurtÃ g. He became particularly interested in Baroque music and contemporary music .
Simplified: He also worked with the composers Witold LutosÅ awski and GyÃ rgy KurtÃ g , cultivating an interest in contemporary music . He also became interested in Baroque music .