Simplify the following text for a Grade 7 native English-speaking person.
Original: The Justice and Equality Movement ( JEM ) ( , Hrka alAdl oalmsaoaa ) is a rebel group involved in the Darfur conflict of Sudan , led by Khalil Ibrahim .
Simplified: The Justice and Equality Movement ( JEM ) is a rebel group involved in the Darfur conflict of Sudan . It is led by Khalil Ibrahim .