Simplify the following text for a Grade 7 native English-speaking person.
Original: Boccaccio 's tale is the source of John Keats ' poem Isabella or The Pot of Basil - which in turn inspired the paintings Isabella ( Millais painting ) and Isabella and the Pot of Basil .
Simplified: Boccaccio 's tale is the source of John Keats ' poem Isabella or The Pot of Basil .