Question: The designer of the present gate at the entrance of Valletta, Malta won the Pritzker Architecture Prize in what year?

full_context: Document 1: Renzo Piano: Renzo Piano, {'1': ", '2': ", '3': 'OMRI, OMCA', '4': "} (] ; born 14 September 1937) is an Italian architect and engineer. His notable buildings include the Centre Georges Pompidou in Paris (with Richard Rogers, 1977), The Shard in London (2012), and the Whitney Museum of American Art in New York City (2015). He won the Pritzker Architecture Prize in 1998.
Document 2: Birch Gate: The Birch Gate (Berezoviye Gate, Russian: Берёзовые ворота ) is a stone gate located on the eastern border of the Palace Park in Gatchina, Leningrad Oblast, Russia. The facility was built in the late 18th century by the famous architect Vincenzo Brenna and architectonics is unique among other palace and park facilities suburb of St. Petersburg. Birch gates are considered one of the best creations of the architect in the Gatchina Palace and Park Ensemble.
Document 3: Andrea Maffei (architect): Andrea Maffei is an Italian architect, born in Modena in 1968. He was associate director for the projects based in Italy by Arata Isozaki. Among these projects is the New exit for the Uffizi Gallery in Florence, which won first place in an international design competition launched in 1998. In 2005 he founded Andrea Maffei Architects, architecture office with headquarters in Brera (district of Milan), Italy. He is the co-designer with Isozaki of the New Town Library in Maranello, which was opened to the public in 2012; of the CityLife office tower in Milan (currently under construction and due to become, with its height of 207 meters, the tallest skyscraper in Italy); of the renovation of the Bologna Centrale railway station, due to be completed by 2016. Maffei was also the project architect for the Palasport Olimpico, designed by Arata Isozaki & Associates and built for the 2006 Winter Olympics in Turin.
Document 4: City Gate (Valletta): City Gate (Maltese: "Bieb il-Belt" , literally "Door to the City") is a gate located at the entrance of Valletta, Malta. The present gate, which is the fifth one to have stood on the site, was built between 2011 and 2014 to designs of the Italian architect Renzo Piano.
Document 5: Birgu Clock Tower: The Birgu Clock Tower (Maltese: "It-Torri tal-Arloġġ tal-Birgu" ), also called the "Vittoriosa Clock Tower" and originally the Civic Clock Tower, was a clock tower in Birgu, Malta. It was located in Victory Square, the city's main square, and it was a prominent landmark in Birgu and the rest of the Three Cities. The tower was probably built in the Middle Ages, although some sources state that it was constructed in 1549. It served as a watchtower since it had views over the Grand Harbour and the surrounding countryside, and it saw use during the Great Siege of Malta in 1565. A clock was installed in the tower in the 17th century.
Document 6: New Exhibition Hall (Turin): The New Exhibition Hall is a large pavilion designed by the Italian architect Massimiliano Fuksas, located in the city of Turin, in northern Italy.
Document 7: Anthony Hunt: Anthony Hunt (born 1932) is a structural engineer of numerous world-renowned buildings, with a career spanning from the 1950s until his retirement in 2002. With a strong interest in both engineering and industrial design, Hunt was a major player in creating the High Tech style of Norman Foster and Richard Rogers. He formed Anthony Hunt associates in 1962. He worked with Rogers and Foster on Reliance Controls building in Swindon (1966) which was the first building of the High Tech architecture style. He was also a structural engineer on the Waterloo International railway station in London (1993).
Document 8: Southport Gates: The Southport Gates are three city gates in the British Overseas Territory of Gibraltar. They are located in the Charles V Wall, one of the 16th century fortifications of Gibraltar. The gates are clustered together, with the South Bastion to the west, and the Trafalgar Cemetery to the east. The first and second Southport Gates were constructed at present day Trafalgar Road in 1552 and 1883, respectively. The third gate, Referendum Gate, is the widest of the three and was constructed in 1967 at Main Street, immediately west of the first two gates. The Southport Gates are listed with the Gibraltar Heritage Trust.
Document 9: César Pelli: César Pelli, founder of Pelli Clarke Pelli Architects, is an Argentine American architect who has designed some of the world's tallest buildings and other major urban landmarks. Some of his most notable contributions include the Petronas Towers in Kuala Lumpur and the World Financial Center in New York City. The American Institute of Architects named him one of the ten most influential living American architects in 1991 and awarded him the AIA Gold Medal in 1995. In 2008, the Council on Tall Buildings and Urban Habitat presented him with The Lynn S. Beedle Lifetime Achievement Award.
Document 10: Cospicua: Cospicua (Maltese: "Bormla" ] ), also known by its titles Città Cospicua or Civitas Cottonera, is a double-fortified harbour city in the South Eastern Region of Malta. Along with Birgu and Senglea, it is one of the Three Cities, located within the Grand Harbour to the east of the capital city Valletta. With a population of 5,395 as of March 2014, it is the most dense city of the Three Cities.
Document 11: Santiago Calatrava: Santiago Calatrava Valls (born 28 July 1951) is a Spanish architect, structural engineer, sculptor and painter, particularly known for his bridges supported by single leaning pylons, and his railway stations, stadiums, and museums, whose sculptural forms often resemble living organisms. His best-known works include the Milwaukee Art Museum, the Turning Torso tower in Malmö, Sweden, the Margaret Hunt Hill Bridge in Dallas, Texas, and his largest project, the City of Arts and Sciences and Opera House, in his birthplace, Valencia. His architectural firm has offices in New York City, Doha, and Zürich.
Document 12: Leslie E. Robertson: Leslie Earl Robertson (born February 12, 1928) is an American engineer. He was the lead structural engineer of the Twin Towers of the original World Trade Center in New York City. He has since been structural engineer on numerous other projects, including the Shanghai World Financial Center and the Bank of China Tower in Hong Kong.
Document 13: Peter Zumthor: Peter Zumthor (born 26 April 1943) is a Swiss architect whose work is frequently described as uncompromising and minimalist. Though managing a relatively small firm, he is the winner of the 2009 Pritzker Prize and 2013 RIBA Royal Gold Medal.
Document 14: Malta International Airport: Malta International Airport (Maltese: "Ajruport Internazzjonali ta' Malta" , IATA: MLA, ICAO: LMML ) is the only airport in Malta and it serves the whole of the Maltese Islands. It is located on island of Malta, between Luqa and Gudja, and occupies the location of the former RAF Luqa. It was completely refurbished, becoming fully operational on 25 March 1992. It is still referred to by locals as Luqa Airport, and sometimes as Valletta Airport internationally, as it is located 5 km southwest of the Maltese capital Valletta. The airport serves as the main hub for Air Malta and a base for Ryanair. It is also home to the Area Control Center and hosts the annual Malta Airshow, visited by military and civil aircraft from various European and other countries. The airport is operated by Malta International Airport plc.
Document 15: Herzog &amp; de Meuron: Herzog & de Meuron Basel Ltd., or Herzog & de Meuron Architekten, BSA/SIA/ETH (HdM), is a Swiss architecture firm with its head office in Basel, Switzerland. The careers of founders and senior partners Jacques Herzog (born 19 April 1950) and Pierre de Meuron (born 8 May 1950) closely paralleled one another, with both attending the Swiss Federal Institute of Technology (ETH) in Zurich. They are perhaps best known for their conversion of the giant Bankside Power Station in London to the new home of Tate Modern. Jacques Herzog and Pierre de Meuron have been visiting professors at the Harvard University Graduate School of Design since 1994 and professors at ETH Zürich since 1999.
ground_truth: 1998