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

full_context: Document 1: Le Point (TV series): Le Point is a Canadian television newsmagazine series, which aired on Radio-Canada from 1983 to 2006. The program, which aired following "Le Téléjournal" weeknights, explored the news in depth with interviews and documentary reports.
Document 2: Martin Boudot: Martin Boudot is a French investigative journalist and documentary filmmaker based in Paris, France. He is part of Premières Lignes Télévision, a TV press agency specialized in investigative journalism. Since 2012, he has been working for "Cash Investigation", the award-winning investigative magazine broadcast on France 2, the French national TV news network. He has won the 2015 DIG Award, the European investigative documentary of the year for "The real price of your mobile phone". He was among the 2015 and 2017 finalists of the Albert Londres Prize, the highest French journalistic distinction.
Document 3: 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".
Document 4: Presse quotidienne nationale française: Presse quotidienne nationale française is a group of eighteen paid-for French daily newspapers, of which six have circulations in excess of , and four free newspapers, which have a much larger circulation: not only is the paid-for press more expensive, but there are fewer outlets from which to buy newspapers. In recent years many newsstands and newsagents in Paris that sold newspapers have closed, and customers would need to travel far to get some titles.
Document 5: L'Obs: L’Obs ] , previously known as Le Nouvel Observateur (1964-2014), is a weekly French news magazine. Based in the 2nd arrondissement of Paris, it is the most prominent French general information magazine in terms of audience and circulation. Its current editor is .
Document 6: Exberliner: Exberliner is an English-language magazine published in Berlin. It is published monthly (except for the July/August double issue) and available for €3.90 at newsstands around the city or by subscription. The magazine offers cultural listings, reviews, journalistic articles, opinion columns and a large classified section which is also continually updated online. It also regularly organizes parties and cultural events (such as the monthly English-language Wednesdays at Burger in Kaffee Burger) in English. The magazine was founded as a free newspaper in 2002 named "The Berliner" but was forced to change the name, which was already trademarked. The new name is intended as a play on expatriate (English-speaking expatriates being a major target audience). The publishing house Iomauna Media GmbH also operates Exberliner Flat Rentals, which helps foreigners rent apartments in Berlin, as well as Exberliner Jobs, a job board for internationals in Berlin.
Document 7: Paris Match: Paris Match (] ) is a French-language weekly news magazine. It covers major national and international news along with celebrity lifestyle features.
Document 8: François Hauter: François Hauter (born 1951) is a French senior reporter, a former chief editor for "Le Figaro" and correspondent in Africa, China and the United-States. He won the Albert Londres Prize in 1986 and the Louis Hachette prize in 2008.
Document 9: L'actualité: L'actualité is a Canadian French-language news and general interest magazine published in Montreal by Les Éditions Rogers, which is owned by Rogers Communications. The magazine has over a million readers, according to Canada's Print Measurement Bureau, from its circulation which is mainly subscribers. Eighty-six percent of its readership are Québécois.
Document 10: Jean Portante: Jean Portante was born in Differdange, Luxembourg, and now lives in Paris. He has written novels, stories, plays, journalism and poetry, and has been widely translated, including in English Point/Erasing, translated by Anne Marie Glasheen (Daedalus, 2003) and In Reality, translated by Zoë Skoulding (Seren Press, 2013). He is a translator of poetry into French from Spanish, Italian, English and German. His novels include Mrs Haroy ou la mémoire de la baleine (Editions Phi, 1997) among others, which has been translated into many languages, and he is also the author of the biography Allen Ginsberg: L'autre Amérique (Le Castor Astral, 1999). Portante’s collection of poems L’Etrange langue (Editions Le Taillis Pré, 2002) won the Mallarmé award in France in 2003, and the same year he was given the Grand Prix d’Automne de la Société des Gens de Lettres for his entire life’s work in poetry. In 2005, Le Castor Astral published a selected poems, La Cendre des mots, covering his work from 1989 to 2005. Since 2006 he has been a member of the Académie Mallarmé. In 2008 he co-founded the French poetry magazine "Inuits dans la jungle" with the poet Jacques Darras, while in Luxembourg he heads the literary magazine Transkrit. In 2011 he was awarded Luxembourg’s Batty Weber National Prize, which is given every three years for a life’s work. His latest books are En réalité (Editions Phi 2008); La réinvention de l'oubli (Editions le Castor Astral, 2010), Conceptions (Editions Phi, 2012) and Après le tremblement (Editions Le Castor Astral, 2013)
Document 11: Paul Radu: Paul Radu is an investigative journalist based in Bucharest, Romania. He is the director of the Organized Crime and Corruption Reporting Project. He is also one of the cofounders of the Romanian Center for Investigative Journalism. He investigates transnational crime in Eastern Europe. He has received multiple international awards for his journalism. He believes that journalists should not be activists, but should rather trust that objective journalism is a sufficient contribution to whatever causes one might otherwise advocate. He teaches at the Balkan Investigative Reporting Network Summer School of Investigative Reporting. In 2008, he sat on a Central European Initiative jury to name that year's best investigative journalist; the jury chose Drago Hedl. In 2009, he appeared on "48 Hours" investigating sexual slavery and human trafficking in Romania. He has also investigated human trafficking in Bosnia and Herzegovina.
Document 12: Jason Motlagh: Jason Motlagh is a journalist, writer, photographer, and filmmaker who has reported for media organisations including The Economist, The Washington Post, The New Republic, The Atlantic, The Christian Science Monitor, and U.S. News & World Report. He is a Pulitzer Center International Reporting Fellow and former Kabul correspondent for TIME. He was interviewed by Sacha Pfeiffer on NPR's nationally syndicated radio show On Point in 2016 concerning his work following migrants through the Darién Gap.
Document 13: Albert Londres: Albert Londres (1 November 1884 – 16 May 1932) was a French journalist and writer. One of the inventors of investigative journalism, Londres not only reported news but created it, and reported it from a personal perspective. He criticized abuses of colonialism such as forced labour. Albert Londres gave his name to a journalism prize, the Prix Albert-Londres, for Francophone journalists.
Document 14: Le Monde mensuel: Le Monde mensuel was a French language monthly news magazine published in Paris, France, from 2010 to 2014. It mostly covered selected articles from "Le Monde" published in the preceding month.
Document 15: 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".
ground_truth: Paris