Question: When did Amado Carrillo Fuentes assassinate his boss Rafael Aguilar Guajardo?

Context paragraphs:
Juárez Cartel: The Juárez Cartel (Spanish: "Cártel de Juárez"), also known as the Vicente Carrillo Fuentes Organization, is a Mexican drug cartel based in Ciudad Juárez, Chihuahua, across the U.S.-Mexico border from El Paso, Texas.  The cartel is one of several drug trafficking organizations that have been known to decapitate their rivals, mutilate their corpses and dump them in public places to instill fear not only into the general public, but also into local law enforcement and their rivals, the Sinaloa Cartel.  The Juárez Cartel has an armed wing known as La Línea, a Juarez street gang that usually performs the executions.  It also uses the Barrio Azteca gang to attack its enemies.

Valentín Elizalde: Valentín Elizalde Valencia (1 February 1979 – 25 November 2006) was a Mexican banda music singer gunned down in an ambush.  Known by the nickname "El Gallo de Oro" (The Golden Rooster), his biggest Banda hits included: "Vete Ya," "Ebrio de Amor", " Vete Con Él", "Vuelve Cariñito", "Cómo Me Duele", "Vencedor", " Mi Virgencita", and "Soy Así".  Some of his songs were narcocorridos eulogizing Mexican drug lords like Vicente Carrillo Fuentes.  He was allegedly murdered at the age of 27 by a member of the drug trafficking gang Los Zetas, which at that time served as the armed wing of the Gulf Cartel.

Vicente Carrillo Fuentes: Vicente Carrillo Fuentes (born October 16, 1962), commonly referred to by his alias El Viceroy, is a Mexican suspected drug lord and former leader of the Juárez Cartel, a drug trafficking organization.  The cartel is based in Chihuahua, one of the primary transportation routes for billions of dollars' worth of illegal drug shipments entering the United States from Mexico annually.  He was one of Mexico's most-wanted drug lords.

The Discovery of America by the Turks: The Discovery of America by the Turks (Portuguese: A Descoberta da América pelos Turcos) is a Brazilian Modernist novel.  It was written by Jorge Amado in 1994 but not published in English until 2012.  Amado tells how, in 1991, he was approached by an organization in Italy to write a story to celebrate the fifth centennial of the discovery of the American continent.  This would be published in a book, together with stories by Norman Mailer and Carlos Fuentes, which would be handed out to passengers flying between Italy and Central, North and South America in 1992, the year of the fifth centennial.  Amado submitted The Discovery of America by the Turks but the Italian book was never published, leaving Amado free to publish the 77-page story as a separate volume.

Matador (English musical): Matador is the title of a 1991 musical by Mike Leander and Edward Seago, with a book by Peter Jukes, which tells the story of the rise and fall of a fictional matador, loosely based on Manuel Benitez, El Cordobes.  The show featured stunning choreography in traditional Flamenco style by Rafael Aguilar, and the show won an Olivier Award as a result.  Several dancers were cast directly from Spain, making their West End debuts.  The bulls for the fighting sequences were performed by a phalanx of black-clad dancers, moving as one.

Rafael Aguilar: Rafael Aguilar (born Rafael Franco; 24 December 1929 – 3 March 1995) was an Ecuadorian ballet dancer and choreographer.

El Señor de los Cielos: El Señor de los Cielos is an American telenovela created by Luis Zelkowicz, based on an original idea by Mariano Calasso, and Andrés López and it started airing on American broadcast channel Telemundo on April 15, 2013.  Produced by Argos Comunicación and Telemundo Studios, and Caracol Internacional in the first season, and distributed by Telemundo Internacional.  The series is based on the life and work of Amado Carrillo Fuentes, the former leader of the Juarez Cartel.  The program features an ensemble cast, headed by its longest-serving actors Rafael Amaya as Aurelio Casillas and Fernanda Castillo as Mónica Robles.

Amado Carrillo Fuentes: Amado Carrillo Fuentes (December 17, 1956 – July 4, 1997) was a Mexican drug lord who seized control of the Juárez Cartel after assassinating his boss Rafael Aguilar Guajardo.  Amado Carrillo became known as ""El Señor de Los Cielos"" ("The Lord of the Skies"), because of the large fleet of jets he used to transport drugs.  He was also known for laundering money via Colombia to finance his large fleet of airplanes.

Rafael Aguilar Guajardo: Rafael Aguilar Guajardo (1950 - April 12, 1993) was a Mexican drug lord, federal police commander of the Direccion Federal de Seguridad (DFS) in Mexico, and one of the Juárez Cartel co-founders.

Pablo Acosta Villarreal: Pablo Acosta Villarreal, commonly referred to as El Zorro de Ojinaga ("The Ojinaga Fox") was a Mexican narcotics smuggler who controlled crime along a two-hundred mile stretch of U.S.-Mexico border.  At the height of his power, he was smuggling 60 tons of cocaine per year for the Colombians —in addition to the incalculable amounts of marijuana and heroin that were the mainstay of his business.  He was the mentor and business partner of Amado Carrillo Fuentes, the so-called 'Lord of the Skies', who took over after Acosta's death.

Supporting paragraphs: Amado Carrillo Fuentes Rafael Aguilar Guajardo
Answer: April 12, 1993