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

Context paragraphs:
Pritzker Architecture Prize: The Pritzker Architecture Prize is awarded annually "to honor a living architect or architects whose built work demonstrates a combination of those qualities of talent, vision and commitment, which has produced consistent and significant contributions to humanity and the built environment through the art of architecture."  Founded in 1979 by Jay A. Pritzker and his wife Cindy, the award is funded by the Pritzker family and sponsored by the Hyatt Foundation.  It is considered to be one of the world's premier architecture prizes, and is often referred to as the Nobel Prize of architecture.

Philip Johnson: Philip Cortelyou Johnson (July 8, 1906 – January 25, 2005) was an American architect, best known for his works of Modern architecture, including the Glass House in New Canaan, Connecticut, and his works of postmodern architecture, particularly 550 Madison Avenue which was designed for AT&T, and 190 South La Salle Street in Chicago.  In 1978 he was awarded an American Institute of Architects Gold Medal and in 1979 the first Pritzker Architecture Prize.

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.

Eduardo Souto de Moura: Eduardo Elísio Machado Souto de Moura (] ; born 25 July 1952, better known as Eduardo Souto de Moura, is a Portuguese architect.  Along with Fernando Távora and Álvaro Siza, he is one of the alumni of the Porto School of Architecture, where he was appointed Professor.  Souto de Moura was awarded the Pritzker Architecture Prize in 2011 and the Wolf Prize in Arts in 2013.

Edward Lifson: Edward Lifson is an award-winning American journalist and architecture critic.  He was the Director of Communications for the Pritzker Architecture Prize.  He was also a domestic, foreign and war correspondent and bureau chief for NPR National Public Radio; and he created and hosted a popular radio show in Chicago called "Hello Beautiful!"  to explore and tell stories of architecture and design issues.  For NPR, in the U.S. Lifson covered urban affairs, politics, economics, labor and arts and culture.  In 1996, he established the National Public Radio Bureau in Berlin, Germany.  In Europe, he covered the rebuilding of Berlin as a city and a national capital, European Union, post-Cold War politics, NATO, the launch of the euro, immigration issues, and Central Europe’s transition to democracy and capitalism.  As a war correspondent, he reported extensively for NPR from Serbia, Kosovo, Montenegro and Macedonia before and during the war in Kosovo.  In addition to Berlin, he has lived for many years in Paris, Florence, Italy and in England.  Lifson was the interim Director of the Shanghai-based American Academy in China, an urban design think tank and studio.

Bill and Ruth Lucas: Bill and Ruth Lucas (née Harvey) were a husband and wife duo who together were accomplished Australian architects based in Sydney, best known for designing the Glass House (also known as the Lucas House) in Castlecrag, Bulwark.  As an architect, educator, furniture designer, set designer, innovator, and utopian, Bill was involved in over 20 projects in both Castlecrag and later Paddington.  Both Bill and Ruth were described as "very good architects in the modern movement in Australia" by Pritzker Architecture Prize 2002 Laureate, Glenn Murcutt.

Kristin Feireiss: Kristin Feireiss (born 1 July 1942) is a German architectural and design curator, writer, and editor.  Her career has included co-founding the Aedes Architecture Forum in Berlin, serving as director of the Netherlands Architecture Institute, and participating as an international juror and commissioner at the Architecture Biennale in Venice.  In 2013, Feireiss became a Pritzker Architecture Prize juror.

Martha Thorne: Martha Thorne is an American architectural academic, curator, editor, and author.  She is the Executive Director of the Pritzker Architecture Prize and Dean in the architecture school at IE University in Madrid.  Formerly, she was a curator in architecture at the Art Institute of Chicago.

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.

Glenn Murcutt: Glenn Marcus Murcutt AO (born 25 July 1936) is a British-born Australian architect and winner of the 1992 Alvar Aalto Medal, the 2002 Pritzker Architecture Prize and the 2009 American Institute of Architects Gold Medal.  Being the only Australian winner of the prestigious Pritzker Prize, he is often referred to as Australia's most famous architect.

Supporting paragraphs: City Gate (Valletta) Renzo Piano
Answer: 1998