Simplify the following text for a Grade 8 native English-speaking person.
Original: Numerous painters from northern Italy were influenced by Giotto 's work in Padua including Guariento , Giusto de ' Menabuoi , Jacopo Avanzi , and Altichiero .
Simplified: These painters include Guariento , Giusto de ' Menabuoi , Jacopo Avanzi , and Altichiero .