Question: When was "Differences" first conducted by a French composer and conductor? 

Context paragraphs:
España (Chabrier): España, rhapsody for orchestra (French: "España, rapsodie pour orchestre" or "Rapsodie España") is the most famous orchestral composition by French composer Emmanuel Chabrier (1841–1894).  Written in 1883 after a trip to Spain, it was dedicated to the conductor Charles Lamoureux, who conducted the first public performance on 4 November 1883, at the Théâtre du Château d’Eau for the Société des Nouveaux Concerts in Paris.

Syne International Film Festival: SYNE International Film Festival (SIFF) is an annual film festival at Muvattupuzha, Ernakulam(Cochin) in Kerala, India.  SYNE International Film Festival was first conducted in 2001 May.  The First Film festival was started with the film "The Cup" from Tibet.  The festival was conducted by SYNE featured 20 films during 4 days at Muvattupuzha, 35 kilometers away from Cochin in Kerala.

Kuss-Walzer: Kuss-Walzer or 'Kiss Waltz' op. 400 is a waltz by Johann Strauss II composed in 1881.  The waltz was dedicated to his second wife, Angelika Dittrich.  The waltz comprises melodies from Strauss' popular operetta "Der lustige Krieg" (The Merry War) and is an orchestral treatment of the Act 2 aria 'Nur für Natur' which was a hit when first performed.  Eduard Strauss, the composer's brother, first conducted the orchestral piece at the Court Ball in Vienna in 1882.

Alexis Soriano: Alexis Soriano is a Spanish-Lithuanian orchestral conductor and composer.  A pupil of Ilya Musin, and later of Valery Gergiev, he has been Principal Associate Conductor of The Hermitage Orchestra for ten years and is Artistic Director of the "Spanish Evenings Festival" in Saint Petersburg.  On the invitation of Gergiev, he made his debut at the Mariinsky Theater, conducting Mozart's "The Marriage of Figaro".  Since 2009 he has been Artistic Director and principal conductor of the chamber opera company, "Opera Incognita" and conducted the company's first fully staged opera, "The letters of Van Gogh" by Grigory Frid, at the Hermitage Theatre.  The production was nominated for the Golden Mask Award.  His repertoire also includes contemporary and rarely performed music, especially Spanish.  He was chief conductor of INSO Lviv Symphony Orchestra between 2010 and 2012.  He has conducted the first recording of José Lidón's 1792 opera, "Glaura y Cariolano".  Since 2012 he has been Artistic Director of New York Opera Society.  In 2014 he was elected as one of the "100 Spaniards" which excelled abroad in their own discipline.  Among the orchestras he has conducted are those of the Mariinsky Theatre, Teatro Colón, and the Teatro Real in Madrid as well as the Lithuanian National Orchestra, Saint Petersburg Symphony, Prague Symphony, English Chamber Orchestra, and Taipei Symphony.

Colin Davis: Sir Colin Rex Davis (25 September 1927 – 14 April 2013) was an English conductor, known for his association with the London Symphony Orchestra, having first conducted it in 1959.  His repertoire was broad, but among the composers with whom he was particularly associated were Mozart, Berlioz, Elgar, Sibelius, Stravinsky and Tippett.

Pierre Boulez: Pierre Louis Joseph Boulez CBE (] ; 26 March 1925 – 5 January 2016) was a French composer, conductor, writer and organiser of institutions.  He was one of the dominant figures of the post-war classical music world.

Différences (Berio): Différences is a composition by the Italian composer Luciano Berio for flute, clarinet, viola, cello, harp and magnetic tape, dating 1958–59.  It was written for the Domaine musical concerts in Paris and first performed in March 1959, conducted by Pierre Boulez.

Lionel Conacher Award: The Lionel Conacher Award is an annual award given to Canada's male athlete of the year.  The sports writers of the Canadian Press (CP) first conducted a poll to determine the nation's top athlete, of either gender, in 1932.  Separate polls for the best male and female athletes were conducted beginning the following year.  The CP formalized the poll into an award in 1978, presenting their winner with a plaque.  It was named after Lionel Conacher, a multi-sport champion whom the news organization had named its top athlete of the half-century in 1950.  The award is separate from the Lou Marsh Trophy, in which a select panel of sports writers vote for their top overall athlete.

Gaston Borch: Gaston Louis Christopher Borch (8 March 1871 – 14 February 1926) was a French composer, arranger, conductor, cellist and author.  His works include orchestral music, opera and music for silent films.  He played and conducted with orchestras in Europe and the USA.

Reading Excellence and Discovery Foundation: Reading Excellence and Discovery Foundation, Inc. (abbreviated READ) is a non-profit charitable organization in the United States, founded in 1999 by Al Sikes and Alain Lebec.  The program was first conducted at two parochial schools in 2000.  The READ foundation was created in light of the high proportion of children in New York City from low-income households who, at that time, read below grade level.  READ benefits kindergarten and first-grade students at risk of reading below grade level.  The average session is forty-five minutes of phonics and fluency, conducted by middle through high-school students.

Supporting paragraphs: Différences (Berio) Pierre Boulez
Answer: March 1959