Question: Where is the headquarters of the magazine Jean-Marie Pontaut works at?

Context paragraphs:
Jean-Marie Beaudet: Jean-Marie Beaudet (20 February 1908 – 19 March 1971) was a Canadian conductor, organist, pianist, radio producer, and music educator.  He had a long career with the Canadian Broadcasting Corporation, serving variously as a music producer, programing director, conductor, and administrator.  With the CBC Symphony Orchestra he conducted the premiere recordings of works by many Canadian composers, including pieces by Maurice Blackburn, Claude Champagne, J.-J.  Gagnier, Clermont Pépin, and Healey Willan.

Garachi: The Garachi (Azerbaijani: "Qaraçı" ; Kurdish: Qereçî‎ ; Russian: Карачи ), also spelled Karachi or Karaci, are a group of the Romani people living in Azerbaijan.  Little research has been done on the Garachi, and most of what is known about them is based on the works of the 19th-century Russian scholars Kerope Patkanov and Jean-Marie Chopin.

The Chronicle of Anna Magdalena Bach: The Chronicle of Anna Magdalena Bach (German: "Chronik der Anna Magdalena Bach" ) is a 1968 film by the French filmmaking duo of Jean-Marie Straub and Danièle Huillet.  It was their first full-length feature film, and reportedly took a decade to finance.  The film stars renowned harpsichordist Gustav Leonhardt as Johann Sebastian Bach and Christiane Lang as Anna Magdalena Bach.  The orchestral music was performed by Concentus Musicus and conducted by Nikolaus Harnoncourt.  It is the first of several Straub-Huillet films to be based on works of classical music.  The film was entered into the 18th Berlin International Film Festival.

Jean-Marie Souriau: Jean-Marie Souriau (3 June 1922 – 15 March 2012) was a French mathematician, known for works in symplectic geometry, in which he was one of the pioneers.  He published several works, a treatise on calculus [Sou64a], a treatise on relativity [Sou64b] and a treatise on symplectic mechanics [Sou70].  He developed the symplectic aspects of classical and quantum mechanics.  He contributed to the introduction or the development of many important concepts, such as the coadjoint action and the coadjoint orbits of a group on its moment space, which led in particular to the first geometric interpretation of spin at a classical level.  He introduced the moment map, he suggested a program of geometric quantization, he gave a classification of the homogeneous symplectic manifolds, known as the Kirillov-Kostant-Souriau theorem.  Finally, he proposed a new approach to differential geometry by means of diffeological spaces.

Straub–Huillet: Jean-Marie Straub (] ; born 8 January 1933, Metz, France) and Danièle Huillet (] ; 1 May 1936, Paris – 9 October 2006, Cholet) were a duo of filmmakers who made two dozen films between 1963 and 2006.  Their films are noted for their rigorous, intellectually stimulating style and radical politics.  Though both were French, they worked mostly in Germany and Italy. " From the Clouds to the Resistance" (1979) and "Sicilia! " (1999) are among the duo's best regarded works.

Olivier Jean-Marie: Olivier Jean-Marie (born 25 April 1960) is a French animator and director of animated films and shows.  In 2007, he directed , an animated feature film of Lucky Luke.  In 2010, he created and directed Zig and Sharko, a slapstick comedy, and in 2013, he wrote and directed .  Oggy and the Cockroaches is one of his most famous works.  In the French comedy serial Oggy, a tom-cat, continually tries to catch three cockroaches messing about in his house.

Daniel Pezeril: Daniel Pézeril (5 October 1911 in La Serena, Chile – 22 April 1998 in Paris) was the Roman Catholic auxiliary bishop of Paris in the time of Cardinal François Marty.  Before this he had been Curé of Saint-Séverin, a parish known for its liturgical role in the years preceding Vatican II.  The author of several spiritual works, he was also keenly involved in dialogue with non-believers, and in particular was known to be open to currents in French freemasonry.  Pézeril is believed also to have played a key role in the decision to appoint Jean-Marie Lustiger as archbishop of Paris.

L'Express: L'Express (] ) is a French weekly news magazine headquartered in Paris.  The weekly stands at the political center in the French media landscape, and has a lifestyle supplement, "L'Express Styles", and a job supplement, "Réussir".

Jean-Marie Pontaut: Jean-Marie Pontaut (born 26 February 1947 in Neuilly-sur-Seine) is a French investigative journalist, working for the daily "L'Express", after a start and a return trip to "Le Point".

J. M. G. Le Clézio: Jean-Marie Gustave Le Clézio (] ; born 13 April 1940), usually identified as J. M. G. Le Clézio, is a French-Mauritian writer and professor.  The author of over forty works, he was awarded the 1963 Prix Renaudot for his novel "Le Procès-Verbal" and the 2008 Nobel Prize in Literature for his life's work, as an "author of new departures, poetic adventure and sensual ecstasy, explorer of a humanity beyond and below the reigning civilization".

Supporting paragraphs: Jean-Marie Pontaut L'Express
Answer: Paris