Simplify the following text for a Grade 6 native English-speaking person.
Original: The 2 day festival included twenty-four bands over four stages across the island , and was curated and headlined by Nick Cave , attracting an audience of over 11,000 .
Simplified: The two day festival included 24 bands over four stages across the island . The event was organized by Nick Cave , with an audience of over 11,000 .