Question: Where is the group, which organised the Mexican referendums, 1989, based?

Context paragraphs:
Carrusel: Carrusel (] ) is a Mexican children's telenovela produced by Valentín Pimstein for Televisa in 1989.  It's based on the Argentinean character (first televised in 1966), and produced by and broadcast on Televisa in 1989.  It covers daily life in a Mexican elementary school and the children's relationships with a charismatic teacher named Ximena.  Among other plot devices, it deals with the differences between the upper and lower classes of Mexican society — specifically as seen in a romantic relationship between Cirilo, a poor black boy, and a spoiled rich girl, Maria Joaquina Villaseñor.

Zapatista Army of National Liberation: The Zapatista Army of National Liberation ("Ejército Zapatista de Liberación Nacional", EZLN), often referred to as the Zapatistas ] , is a left-wing revolutionary political and militant group based in Chiapas, the southernmost state of Mexico.

Mexcaltitán Ballet: The Mexcaltitán Ballet (native name Ballet Mexcaltitan, Danza y Arte de México) was founded in 1989 by choreographer Sergio Eugenio García Pérez and is based in the western state of Nayarit in Mexico .  It was founded to promote and consolidate Mexican folk dance, with a focus on the state of Nayarit, making it unique.  However, the troupe also performs other dance from Latin America and contemporary dance as well as Mexican styles.  The dancers are young and trained by the company to perform.  The organization is divided into two sections, the main group and a children’s group called the Mexcaltitán Infantil, geared to very young dancers with the aim of training them to become part of the main group.  Today, the troupe is supported by the Nayarit state government and García Pérez remains as the general director.

Trauma I: Trauma I (born March 27, 1985) is a Mexican "luchador enmascarado", or masked professional wrestler, working on the Mexican independent circuit and as a freelance wrestler for promotions such as International Wrestling Revolution Group (IWRG), portraying a "tecnico" ("Good guy") wrestling character.  Trauma I's real name is not a matter of public record, as is often the case with masked wrestlers in Mexico where their private lives are kept a secret from the wrestling fans.  Trauma I is a second generation wrestler, the son of Miguel Calderón Navarro, better known under his ring name Negro Navarro.  He is the younger brother of Trauma II, who he regularly teams up with under the name "Los Traumas".  Trauma I is a freelance wrestler and thus is not exclusively working for one specific professional wrestling promotion but has worked for a large number of Mexican wrestling promotions including working matches on shows promoted by the largest Mexican based promotions such as Lucha Libre AAA World Wide (AAA), Consejo Mundial de Lucha Libre (CMLL), and International Wrestling Revolution Group (IWRG).

Mexican referendums, 1999: A series of unofficial referendums on native rights and good governance was held in Mexico on 21 March 1999.  It was organised by the Zapatista Army of National Liberation (EZLN), who proposed the government function in the interests of the people, that the country demilitarize in order to promote peace, that indigenous Mexicans be fully included in national life and have their rights recognized in the constitution.  While all these measures passed overwhelmingly, only around 2.5 million people voted in the referendum, while 37 million people voted in the general election the following year.

List of Army Cadet Force units: The Army Cadet Force (ACF) is a cadet organisation based in the United Kingdom.  It is a voluntary youth group sponsored by the Ministry of Defence (British Army).  The ACF is largely composed of individual units.  These units are organised into several different companies/squadrons, which in turn are organised into several different Corps or Regiments of their parent British Army units.

La Barredora: La Barredora ("The Sweeper Truck") is a criminal gang based in the Mexican resort city of Acapulco, Guerrero and its surrounding territories.  The criminal group came into existence during the rapid decentralization of Mexico's drug trafficking organizations and as a split-off group of the Beltrán Leyva Cartel.  Originally, the Beltrán Leyva cartel operated in the city, but the group no longer has presence in Acapulco.  After the Mexican military gunned down the top boss of the cartel – Arturo Beltrán Leyva – in December 2009, his brother Héctor Beltrán Leyva took control of one of the factions of the cartel and declared war on Edgar Valdez Villarreal, who had long been the right hand of Arturo.  Amidst the violence, Valdez Villarreal tried to appoint a successor, but those in Acapulco broke off and formed their own criminal gang: the Independent Cartel of Acapulco.  Within weeks, however, the group had splittered too, forming a new and rival group known as La Barredora.  Villarreal Valdez was then captured by the Mexican Federal Police in August 2010, but the violence between the groups for the control of Acapulco continued.

Independent Cartel of Acapulco: The Independent Cartel of Guerrero (Spanish: Cártel Independiente de Acapulco or CIDA) was a criminal gang based in the Mexican resort city of Acapulco, Guerrero and its surrounding territories.  The criminal group came into existence during the rapid decentralization of Mexico's drug trafficking organizations and as a split-off group of the Beltrán Leyva Cartel.  Originally, the Beltrán Leyva cartel operated in the city, but the group no longer has presence in Acapulco.  After the Mexican military gunned down the top boss of the cartel – Arturo Beltrán Leyva – in December 2009, his brother Héctor Beltrán Leyva took control of one of the factions of the cartel and declared war on Edgar Valdez Villarreal, who had long been the right hand of Arturo.  Amidst the violence, Valdez Villarreal tried to appoint a successor, but those in Acapulco broke off and formed their own criminal gang: the Independent Cartel of Acapulco.  Within weeks, however, the group had splittered too, forming a new and rival group known as La Barredora.  Villarreal Valdez was then captured by the Mexican Federal Police in August 2010, but the violence between the groups for the control of Acapulco continued.

List of Air Training Corps squadrons: The Air Training Corps (ATC) is a cadet organisation based in the United Kingdom.  It is a voluntary youth group which is part of the Royal Air Force Air Cadets.  The ATC is largely composed of individual units known as squadrons.  These squadrons are organised into several different "Wings", which in turn are organised into six different "Regions".  Together the "Regions" make up the "Corps".

Mexican referendums, 1995: A series of unofficial referendums on elections, political reforms and electoral participation was held in Mexico on 27 August 1995.  It was organised by the Zapatista Army of National Liberation (EZLN), who proposed a detailed reform for democratization, that the country engage in free and reformed elections and that the EZLN convert itself into a political party and form a united front with other opposition parties.  Another referendum question sought to establish equality for women in government and administration.  All these measures passed, but this unofficial referendum appears to have had little effect on Mexican governance.

Supporting paragraphs: Mexican referendums, 1999 Zapatista Army of National Liberation
Answer: Chiapas