Simplify the following text for a Grade 9 native English-speaking person.
Original: In the following decade he consolidated his career in Italy , entrusted with the world premieres of Puccini 's La bohÃ me and Leoncavallo 's Pagliacci .
Simplified: He conducted the first performances of Puccini 's La BohÃ me and Leoncavallo 's Pagliacci .