Question: Nancy Reagan starred in a film that was based on a plane accident with what registration number?

Context paragraphs:
Resident registration number: In the Republic of Korea, a 'resident registration number (RRN)' (Korean: 주민등록번호 (romanized: Jumin Deungrok Beonho), Hanja: 住民登錄番號) is a 13-digit number issued to all residents of South Korea regardless of nationality.  Similar to national identification numbers in other countries, it is used to identify people in various private transactions such as banking and employment.  It is also used extensively for online identification purposes.  Foreigners (except those affiliated with the U.S. military) receive an alien registration number upon registration with a city office, which serves as a substitute for the "resident" registration number on their alien registration card.

Pan Am Flight 6: Pan Am Flight 6 (registration N90943, and sometimes erroneously called Flight 943) was an around-the-world airline flight that ditched in the Pacific Ocean on October 16, 1956, after two of its four engines failed.  Flight 6 left Philadelphia as a DC-6B and flew westward on a planned multi-stop trip.  It stopped at San Francisco International Airport, then flew onward to Honolulu.  On the evening of October 15, 1956, the flight left Honolulu on a Boeing 377 Stratocruiser named "Clipper Sovereign Of The Skies" (Pan Am fleet number 943, registered N90943).  The accident was the basis for the 1958 film "Crash Landing".

Museum of London Archaeology: Museum of London Archaeology (MOLA), formerly the Museum of London Archaeology Service (MoLAS), is an archaeological organisation registered with the Chartered Institute for Archaeologists (CIfA), providing a wide range of professional archaeological services to clients in London, throughout Southeast England, and elsewhere.  Until 1 November 2011, MOLA was a self-financed division of the Museum of London Group.  As of 1 November 2011, MOLA became an independent limited charitable company, with company registration number 07751831 and charity registration number 1143574.

My Turn (memoir): My Turn: The Memoirs of Nancy Reagan is an autobiography authored by former First Lady of the United States Nancy Reagan with William Novak.  It was published by Random House in 1989.

I-PIN: i-PIN (아이핀 or Internet Personal Identification Number) is a "commercial" alternative to the Resident Registration Number used in South Korea for on-line identification.  Because of the increasing usage of Resident Registration Number for on-line services make it open for the rampant identity frauds and inefficiencies, it is a comprehensive new way for South Korean internet users to engage the web.

Ronald and Nancy Reagan Research Institute: The Ronald and Nancy Reagan Research Institute, an affiliate of the National Alzheimer's Association in Chicago, Illinois, is an initiative founded by former United States President Ronald Reagan and First Lady Nancy Reagan to accelerate the progress of Alzheimer's disease research.  The center was dedicated in 1995.

Crash Landing (1958 film): Crash Landing (aka Rescue at Sea) is a 1958 dramatic, "disaster" film directed by Fred F. Sears, starring Gary Merrill and Nancy Reagan.  This was the last film in which Nancy Reagan (billed as Nancy Davis) appeared, though she continued to work in television for some years thereafter.  "Crash Landing" was based on Pan Am Flight 6, a real-life ditching at sea.

Vehicle registration plates of the Soviet Union: Vehicle registration plates (Russian: Регистрационные знаки транспортных средств, "Registracionny'e znaki transportny'kh sredstv", lit.  "Registration Plates of Vehicles") are used in the USSR for registrations of automobiles, motorcycles, heavy machinery, special-use vehicles as well as construction equipment, military vehicles and trailers.  Every vehicle registration plate consists of a unique registration mark (also known as a registration number) embossed on a metal plate or a plate made of other materials.  All vehicles are required to display the plates on the front side and backside, with the exception of trailers and motorcycles, which are only required to display one on the backside.

Malay Democrats of the Philippines: Malay Democrats of the Philippines is a political party of the Philippines.  It was first registered as Lakas ng Pilipino party on March 23, 1987 with registration number SPC 86-027.  In an order dated February 9, 2001, the Commission on Election acting on a petition filed by former Department of Budget and Management Secretary Salvador Enriquez, renamed the party as Malay Democrats of the Philippines with registration number SPP 01–006.  Malay Democrats of the Philippines is considered an offshoot of National Economic Protectionism Association (NEPA), a local non-government organization in the Philippines.  MDP is the political arm of National Economic Protectionism Association while National Economic Protectionism Association is considered its social arm.

South Korean identity card: Korean citizens are issued a national ID card when reaching age 17.  This card contains a unique "Citizen's Registration Number" (jumin deungnok beonho; Korean: 주민등록번호 ).  The first six numbers indicate the citizen's date of birth, while the last seven numbers includes information such as where the birth was registered.  This resident registration number is used by Korean citizens for all forms of record-keeping.

Supporting paragraphs: Crash Landing (1958 film) Pan Am Flight 6
Answer: N90943