Original sentence: The Zapatista Army of National Liberation  (Ejército Zapatista de Liberación Nacional, EZLN) is an armed revolutionary group (VNSA) based in Chiapas, one of the poorest states of Mexico
Edited sentence: The Zapatista Army of National Liberation  (Ejército Zapatista de Liberación Nacional, EZLN) is an armed revolutionary group (VNSA) based in Chiapas, the southernmost, and one of the poorest, states of Mexico