Question: Nikos Sofis attended which multi-campus private business school with headquarters in Switzerland?

full_context: Document 1: Caixanova Business School: Caixanova Business School ("Escuela de Negocios Caixanova" in Spanish) is a private business school located in Vigo (Spain), established in 1987. It is one of the highest ranked business schools in Spain (the only one in the top 10 out of Madrid or Barcelona). It has been included amongst the best business schools in the world, according to the list made by "Eduniversal", ranked as “Good Business School”. Its MBA is considered one of the best master's degrees in Business Administration in Spain (out of 300 available).
Document 2: Sokratis Papastathopoulos: Sokratis Papastathopoulos (Greek: Σωκράτης Παπασταθόπουλος , ] ; born 9 June 1988) is a Greek footballer who plays as a starting centre back for German Bundesliga club Borussia Dortmund and the Greek national team. Since the surname Papastathopoulos is too long to print on the back of most shirts, the name Sokratis is usually displayed and is the singular name that he is best known by in the football world.
Document 3: Bonn Graduate School of Economics: The Bonn Graduate School of Economics, commonly referred to as BGSE, is the graduate school of the Department of Economics within the Faculty of Law and Economics of the University of Bonn. The BGSE is one of the leading research institutions in the field of economics in Germany. The school offers a master program in economics (2 years) and a doctoral program with an integrated master degree (2 years + 3 years). Students who want to pursue a doctoral degree can specialize in economic research within the master program and then continue with the dissertation phase. The BGSE is a founding member of the EDP (European Doctoral Program in Quantitative Economics). Students benefit from the collaborative research activities of the BGSE with the Institute on Behavior and Inequality (briq), Institute for the Study of Labor (IZA), the Max Planck Institute for Research on Collective Goods (MPI), the Hausdorff Research Institute for Mathematics
Document 4: European School, Munich: The European School, Munich (ESM) is one of thirteen European Schools and one of three in Germany. First established in 1977, it moved to its current location in Neuperlach, a district in the south-east of Munich, in the state of Bavaria in 1981. The ESM was principally established to serve the schooling needs of children of the staff of the European Patent Office (EPO) – the executive body of the European Patent Organisation. However, enrolment is open to other prospective students. The school offers the European Baccalaureate as its secondary leaving qualification.
Document 5: Söhnke M. Bartram: Söhnke Matthias Bartram is a Professor in the Department of Finance at Warwick Business School (WBS). Prior to joining the University of Warwick, he held faculty positions at Lancaster University and Maastricht University and worked for several years in quantitative investment management at State Street Global Advisors as Head of the London Advanced Research Center. He is a Charter Member of Risk Who’s Who and a member of an international think tank for policy advice to the German government.
Document 6: Sport in Greece: Greece has risen to prominence in a number of sporting areas in recent decades. Football in particular has seen a rapid transformation, with the Greek national football team winning the 2004 UEFA European Football Championship. Many Greek athletes have also achieved significant success and have won world and olympic titles in numerous sports during the years, such as basketball, wrestling, water polo, athletics, weightlifting, with many of them becoming international stars inside their sports. The successful organisation of the Athens 2004 Olympic and Paralympic Games led also to the further development of many sports and has led to the creation of many world class sport venues all over Greece and especially in Athens. Greek athletes have won a total 146 medals for Greece in 15 different Olympic sports at the Summer Olympic Games, including the Intercalated Games, an achievement which makes Greece one of the top nations globally, in the world's rankings of medals per capital.
Document 7: European Business School London: European Business School London (EBS London) is a private Business School in Regent's Park in Central London. It is UK's oldest private business school and a constituent school of Regent's University London.
Document 8: Hult International Business School: Hult International Business School is a private global business school with campus locations in San Francisco, London, New York City, Dubai, Boston, and Shanghai. Hult, named for Swedish billionaire and education advocate Bertil Hult, is the successor institution to two former business schools: the Arthur D. Little School of Management, founded in 1964 in Cambridge, Massachusetts, and Ashridge Business School, founded in 1959 in Hertfordshire, England.
Document 9: European School, Varese: The European School, Varese (commonly known as ESV; Italian: "Scuola Europea di Varese"), in Varese, Italy, is a European School, one of a small number of schools founded by the European Union (EU) for the benefit of its staff in member states. The presence of the school in Varese is mainly because nearby Ispra hosts three institutes of the Joint Research Centre of the European Commission.
Document 10: University of Mannheim Business School: The University of Mannheim Business School (UMBS) is among the oldest and most prestigious of the five schools comprising the University of Mannheim, located in Mannheim, Baden-Württemberg, Germany. The Business School, established in 1963, has its origins in the Handelsschule and covers the fields of Business Administration, Finance, Marketing, Accounting, Operations Research, Strategic Management and Corporate Law. The University of Mannheim Business School should not be confused with the Mannheim Business School, which is the umbrella organization for management education at the University of Mannheim. As the first German institution, the Business School of the University of Mannheim has gained the "Triple Crown" (Triple accreditation): It is accredited by AACSB International, the Association of MBAs (AMBA) and EFMD (EQUIS). With 37 chaired professors and about 4,000 students, the Business School ranks among the largest in Europe.
Document 11: Politecnico di Studi Aziendali: The Politecnico di Studi Aziendali (Polytechnic University of Business Studies), formerly also referred to as Politecnico di Lugano (Polytechnic University of Lugano), is an unaccredited distance learning, proprietary, for-profit university located in Zug, Switzerland (previously: Roveredo, Agno, Lugano) operated by ISSEA SA. Degrees or other qualifications from unaccredited institutions may not be accepted by civil service or other employers. Some unaccredited institutions have formal legal authorization to enroll students or issue degrees, but in some jurisdictions (notably including the United States) legal authorization to operate is not the same as educational accreditation.
Document 12: Nikos Sofis: Born in Munich, Germany, and growing up close by to Frankfurt, he attended the Frankfurt International School from where he graduated in 2011. In 2013, he attended the EU Business School in Barcelona, Spain, where he began his Sports Management studies. Since 2014, he continues his studies at the American College of Greece in Athens. He is fluent in Greek, German, and English.
Document 13: Sevanan Business School: Sevanan Business School in Switzerland is a private business school. It offers management courses at undergraduate level and Masters level, accredited to EduQual and London School of Marketing. Sevanan Business School provides international programmes in Business Management & Marketing Management with internships and industry exposure. The school is Located at the World Trade Center in Zurich, Switzerland.
Document 14: Munich Business School: Munich Business School (MBS) is a private international business school located in Munich (Bavaria, Germany). Munich Business School confers degrees exclusively in business administration. It offers one undergraduate Bachelor program, 4 graduate Programs (Masters and MBA), a terminal DBA degree in cooperation with Sheffield Hallam University as well as double degree programs in cooperation with numerous other business schools from around the world. Munich Business School ranks among the top private Business Schools in Germany and in the top 25 performers group regarding internationality and student mobility.
Document 15: EU Business School: EU Business School (formerly "European University") is a multi-campus private business school with headquarters in Switzerland. It operates campuses in Switzerland (Geneva and Montreux), Spain (Barcelona), Germany (Munich), and an executive facility in Yvorne, Switzerland.
ground_truth: EU Business School