Question: The Airport Transit System (ATS) is an automated people mover system at Chicago O'Hare International Airport that was built by Mécanique Aviation Traction and began its operation when?

full_context: Document 1: Tampa International Airport People Movers: The Tampa International Airport People Movers are a set of four separate automatic people mover systems operating within Tampa International Airport. The people mover systems connect the airport’s main terminal to four satellite airside concourses. The system was the world’s first automated people mover built within an airport. A fifth people mover system, known as SkyConnect, is also being installed to connect the main terminal with the airport’s consolidated rental car center.
Document 2: Hispano-Suiza: Hispano-Suiza (English: Spanish-Swiss) was a Spanish automotive/engineering company and, after World War II, a French aviation engine and components manufacturer. It is best known for its luxury cars and aviation engines pre-World War II. In 1923, its French subsidiary became a semi-autonomous partnership with the Spanish parent company. In 1946, the Spanish parent company sold all its Spanish automotive assets to Enasa. In 1968, the French arm was taken over by the aerospace company Snecma, now a part of the French SAFRAN Group.
Document 3: Mahindra Group: The Mahindra Group is an Indian multinational conglomerate holding company headquartered at Mahindra Towers in Mumbai, India, with operations in over 100 countries around the globe. The group has a presence in aerospace, agribusiness, aftermarket, automotive, components, construction equipment, defence, energy, farm equipment, finance and insurance, industrial equipment, information technology, leisure and hospitality, logistics, real estate, retail, and two wheelers. It is considered to be one of the most reputable Indian industrial houses with market leadership in utility vehicles as well as tractors in India.
Document 4: Skytrain (Miami International Airport): The Skytrain is an airside automated people mover system operating at Miami International Airport. It operates within the airport's Concourse D, which is a major international hub for American Airlines. The system, which opened in 2010 as part of an expansion of Concourse D, can transport passengers from end to end of the mile long concourse in five minutes. The Skytrain is one of three separate automated people movers operating at the airport. The others are the MIA Mover which connects to the Miami Intermodal Center, and the people mover connecting Concourse E's satellite building.
Document 5: Matra: Mécanique Aviation Traction or Matra ("M"écanique "A"viation "TRA"ction) was a French company covering a wide range of activities mainly related to automobiles, bicycles, aeronautics and weaponry. In 1994, it became a subsidiary of the Lagardère Group and now operates under that name.
Document 6: Matra Alice: The Matra & Hachette Ordinateur Alice was a home computer sold in France beginning in 1983. It was a clone of the TRS-80 MC-10, produced through a collaboration between Matra and Hachette in France and Tandy Corporation in the United States.
Document 7: MIA Mover: The MIA Mover is an automated people mover (APM) system which opened at the Miami International Airport (MIA) in metropolitan Miami, Florida, United States on September 9, 2011. The MIA Mover is designed to quickly transport landside passengers between Miami International Airport's Main Terminal and the Miami Central Station and Rental Car Center, as part of the Miami Intermodal Center (MIC). The MIA Mover is one of three separate automated people movers operating at the airport. The others are the Skytrain (which operates within Concourse D), and the people mover connecting Concourse E's satellite building.
Document 8: Mahindra &amp; Mahindra: Mahindra and Mahindra Limited (M&M) is an Indian multinational car manufacturing corporation headquartered in Mumbai, Maharashtra, India. It is one of the largest vehicle manufacturers by production in India and the largest manufacturer of tractors in the world. It is a part of Mahindra Group, an Indian conglomerate.
Document 9: Leonardo S.p.A.: Leonardo S.p.A., formerly Leonardo-Finmeccanica and Finmeccanica, is an Italian global high-tech company and one of the key players in aerospace, defence and security. Headquartered in Rome, the company has 180 sites worldwide. It is the ninth largest defence contractor in the world based on 2014 revenues. The company is partially owned by the Italian government through the Ministry of Economy and Finance, which holds 30.2% of the company's shares and is its largest shareholder.
Document 10: Satellite Transit System: The Satellite Transit System (STS) is an automated people mover (APM) system operating in the Seattle–Tacoma International Airport. Originally opening in 1969, the STS system is the oldest airport people mover system in the United States. The APM was designed to quickly transport passengers between SeaTac Airport's Main Terminal and the North and South Satellites.
Document 11: Pittsburgh International Airport People Movers: The Pittsburgh International Airport People Mover is a fully automated people mover system at the Pittsburgh International Airport serving Pittsburgh, Pennsylvania. Designed and installed at a cost of $14 million by Adtranz (now Bombardier), it runs in two parallel underground tunnels to connect the landside terminal with the airside terminal.
Document 12: Matra 530: The Matra 530 is a sports car created and built by the French engineering group Matra.
Document 13: Minneapolis–St. Paul Airport Trams: The Minneapolis–St. Paul Airport Trams consist of a pair of cable-drawn automated people movers that serve travelers of the Minneapolis–Saint Paul International Airport. Both were constructed by the Poma-Otis Transit Company of Farmington, Connecticut and are operated under the direction of the Metropolitan Airports Commission.
Document 14: Matra Rancho: The Matra Rancho is a leisure activity vehicle created by the French engineering group Matra, in cooperation with the automaker Simca, to capitalize on the off-road trend started by the Range Rover. The Rancho provided an "off-road look" at a lower price.
Document 15: Airport Transit System: The Airport Transit System (ATS) is an automated people mover system at Chicago O'Hare International Airport. The 2.7 mi system was built by Matra at a cost of $127 million, and began its operation on May 6, 1993. It can accommodate up to 2,400 passengers per hour.
ground_truth: May 6, 1993