Question: In what city did the worst accident of the Air France airline originate from?
Context: Air France has been in operation since 1933.  Its aircraft have been involved in a number of major accidents and incidents.  The worst accident of the airline occurred on June 1, 2009, when Air France Flight 447, an Airbus A330-203, crashed into the Atlantic Ocean with 228 fatalities.  A selected list of the most noteworthy of these events is given below. The Société Générale des Transports Aériens (SGTA) was a French airline founded in 1919.  It operated until 1933 when its assets were incorporated in the newly created Air France airline. Air France Flight 422 was a scheduled flight on 20 April 1998 by Air France from Bogotá, Colombia, to Quito, Ecuador, covering the final leg of a flight from Paris to Bogotá, operated by TAME on behalf of Air France.  The Boeing 727 was destroyed, killing all 53 people on board, when it crashed into the mountains east of Bogotá because of foggy weather and low visibility after taking off from Bogotá's El Dorado International Airport.  The plane was owned by TAME, the Ecuadorian airline, but operated on a wet-lease basis to Air France as the final leg of its flight from Paris. Dan-Air Flight 1008 was a fatal accident involving a Boeing 727-46 jet aircraft operated by Dan Air Services Limited on a non-scheduled international passenger service from Manchester to Tenerife.  The crash, which occurred on 25 April 1980 in a forest on Tenerife's mount La Esperanza while the aircraft's flight deck crew wrongly executed an unpublished holding pattern in an area of very high ground, resulted in the aircraft's destruction and the deaths of all 146 on board (138 passengers and eight crew).  Flight 1008 was Dan-Air's second major accident in 10 years and the worst accident killing fare-paying passengers in the airline's entire history. SANSA Flight 32, a CASA C-212 Aviocar on its way to Palmar Sur Airport crashed into the Cerro Cedral, a mountain in Costa Rica after takeoff from Juan Santamaria International Airport in San Jose on January 15, 1990.  All 20 passengers and 3 crew on board died in the crash.  Pilot fatigue was determined to be the cause.  At the time, it was the worst accident involving a CASA C-212 Aviocar and is currently the fifth worst accident.  It is also currently the second worst accident in Costa Rica. Air France–KLM is a Franco-Dutch airline holding company incorporated under French law with its headquarters at Charles de Gaulle Airport in Tremblay-en-France, near Paris.  The group has offices in Montreuil, Seine-Saint-Denis, Paris, and in Amstelveen, Netherlands.  Air France–KLM is the result of the merger in 2004 between Air France and KLM.  Both Air France and KLM are members of the SkyTeam airline alliance.  The company's namesake airlines rely on two major hubs, Amsterdam Airport Schiphol and Paris–Charles de Gaulle Airport.  Air France–KLM Airlines transported 87.3 million passengers in 2014. Vietnam Airlines Flight 831, a Tupolev Tu-134 crashed in a rice field near Semafahkarm Village, Tambon Khu Khot, Amphoe Lam Luk Ka, Pathum Thani, Thailand while operating a flight from Hanoi to Bangkok.  The cause of the accident is undetermined, however the pilots reported the aircraft may have been struck by lightning.  Three crew and 73 passengers died in the accident.  This accident was the second worst accident at the time in Thailand, and is currently the fifth worst. Aeroflot Flight 1036 (Russian: Рейс 1036 Аэрофлота "Reys 1036 Aeroflota") was a domestic scheduled passenger flight operated by Aeroflot that crashed during takeoff from Sochi Airport on 1 October 1972.  All 109 people aboard the Ilyushin Il-18V perished in the crash.  It is the second worst accident involving an Ilyushin Il-18 and it was the worst accident involving one at the time. Air France (] ; formally "Société Air France, S.A."), stylized as AIRFRANCE, is the French flag carrier headquartered in Tremblay-en-France.  It is a subsidiary of the Air France–KLM Group and a founding member of the SkyTeam global airline alliance.  As of 2013 Air France serves 36 destinations in France and operates worldwide scheduled passenger and cargo services to 168 destinations in 93 countries (including overseas departments and territories of France) and also carried 46,803,000 passengers in 2015.  The airline's global hub is at Charles de Gaulle Airport with Orly Airport.  Air France's corporate headquarters, previously in Montparnasse, Paris, are located on the grounds of Charles de Gaulle Airport, north of Paris. Air France Flight 447 (AF447/AFR447) was a scheduled passenger flight from Rio de Janeiro, Brazil to Paris, France, which crashed on 1 June 2009.  The Airbus A330, operated by Air France, entered an aerodynamic stall from which it did not recover and crashed into the Atlantic Ocean at 02:14 UTC, killing all 228 passengers, aircrew and cabin crew aboard the aircraft.
Answer: Rio de Janeiro, Brazil