Question: Aviapartner lost its operating license at Brussels Airport to an aviation company heaquartered in what Swiss city?
Context: SN Brussels Airlines (SNBA) was a national airline of Belgium, which mainly operated from Brussels Airport.  SNBA was the trading name of the Belgian airline Delta Air Transport.  SNBA was a full-service airline, connecting Brussels with the rest of Europe.  It also flew to Africa, continuing Sabena's extensive network there.  The airline merged with Virgin Express into Brussels Airlines which started operations on 25 March 2007 The airline had its head office in Airport Building 117 in Brussels Airport, Zaventem, near Brussels. Aviapartner, whose origins date back to 1949 under the name of Herfurth Air Services to become 'Belgavia' in the late 1960s, is a Belgian company that provides aircraft ground handling services at 32 airports in Belgium, France, Germany, Italy and The Netherlands.  Among the airports served are Amsterdam, Brussels, Berlin-Tegel, Frankfurt A.M., Milan, Rome, Nice and Paris-CDG.  Herfurth/Belgavia started aircraft handling at Antwerp,Deurne airport and extended its activities at Ostend airport in the early 1960s.  Later it started handling at Brussels and other airports.  On June 9, 2011 Aviapartner lost its operating license at Brussels Airport to Swiss-based Swissport for a period of 7 years.  But the court broke this decision.  Aviapartern kept its licence and Swissport merged with FlightCare, the second aircraft ground services company at Brussels Airport.  Note that there are only two licences at Brussels airport. Abelag Aviation is an air charter company based in Brussels, Belgium.  It operates ad hoc charter, air taxi, cargo and medical flights, as well as helicopter VIP flights and air ambulance work.  Its main base is Brussels Airport, with seats at Antwerp International Airport, Kortrijk-Wevelgem International Airport, Paris Le Bourget Airport, France and Eindhoven Airport. On July 21, 2000, Foothill Conservancy, a nonprofit organization based in Amador County, California, was among the parties signing the historic settlement agreement with PG&E that formed the basis for a new 30-year operating license for the Mokelumne River Project.  Every nonfederal hydroelectric project in the country operates under license from the Federal Energy Regulatory Commission (FERC).  As a project's license expires, the licensee begins a relicensing process that generally leads to a new license with updated terms.  The new license lasts 30 to 50 years. N.V. Virgin Express S.A. was an airline created within the Virgin Group.  It operated flights mainly to southern Europe from its hub at Brussels Airport.  Ticket sales were mainly through the Internet.  The airline has merged with SN Brussels Airlines to form Brussels Airlines which started operations on 25 March 2007 Virgin Express' head office was in Building 116 at Brussels Airport in Zaventem, Belgium, near Brussels. Swissport International Ltd. is a Swiss aviation services company providing airport ground and cargo handling services, headquartered in Opfikon, Switzerland. The Combined Construction and Operating License (Regulatory Guide 1.206, COL) replaced the previous Draft Regulatory Guide 1145 as the licensing process for new nuclear power plants in the United States.  It is a part of a newer "streamlined" process that encourages standard plant designs, and prevents delays in operation that contributed to the mothballing of many plants since the 1980s. " "A combined license authorizes construction and conditional operation of a nuclear power plant.  The application for a combined license must contain essentially the same information required in an application for an operating license issued under 10 CFR Part 50, including financial and antitrust information and an assessment of the need for power.  The application must also describe the inspections, tests, analyses, and acceptance criteria (ITAAC) that are necessary to ensure that the plant has been properly constructed and will operate safely"." Brussels Airport - Zaventem is a railway station located beneath Brussels Airport, Flemish Brabant, Belgium.  The station opened in 1958 on Line 36C; in 2012, the new Line 25N was added.  The train services are operated by National Railway Company of Belgium (NMBS/SNCB). Brussels Airport (IATA: BRU, ICAO: EBBR) (also called "Brussel-Nationaal " / "Bruxelles-National " (Brussels-National) or "Zaventem") is an international airport 6.5 NM northeast of Brussels, the capital of Belgium.  In 2015, more than 23 million passengers arrived or departed at Brussels Airport, making it the 21st busiest airport in Europe.  It is located partially in Zaventem, partially in the Diegem area of Machelen, and partially in Steenokkerzeel, in the Flemish Region of Belgium.  It is home to around 260 companies, together directly employing 20,000 people and serves as the home base for Brussels Airlines, TUIfly Belgium and Thomas Cook Airlines Belgium. Haren Airport or Evere Airfield is a former military airfield and civil airport in Brussels, Belgium.  Located in Brussels' city section of Haren and adjacent municipality of Evere, it was established by the German Empire in 1914 and lasted until the early 1950s when it was closed.  Meanwhile it had been replaced by nearby Melsbroek airfield that Nazi Germans had established in World War II, which developed into the current Brussels Airport.  The former grounds of Haren-Evere airfield were redeveloped as part of the expanding Brussels urban area; some buildings remain in use as facilities of the Belgian military.  The headquarters of NATO are located at Haren (Brussels) on part of the former airport grounds.
Answer: Opfikon