Question: What Austrian-born British concert pianist co-founded the Leeds International Piano Competition?

Context paragraphs:
Marioara Trifan: Trifan was born in Los Angeles and grew up in New Jersey.  She studied at the Curtis Institute of Music, Philadelphia, and at the Juilliard School, New York, where she received Bachelor's and Master's degrees.  She won prizes at several international piano competitions, such as Ferruccio Busoni International Piano Competition (1971), Paloma O'Shea International Piano Competition (1975), Clara Haskil International Piano Competition (1981), Sydney International Piano Competition (1977), Santander International Piano Competition (1975), Premio Jaén (1973), Concorso Internazionale Dino Ciani in Milan (1975).

Sa Chen: Sa Chen () (born 1979 in Chongqing, China) is a Chinese pianist.  She won first prize in the 1994 China International Piano Competition, fourth place in the 2000 International Frederick Chopin Piano Competition, a prize in the Leeds International Piano Competition and was third in the 2005 Van Cliburn International Piano Competition.

2015 Leeds International Piano Competition: The 2015 Leeds International Piano Competition was the 18th edition of the tournament, and it was held in the University of Leeds and the Leeds Town Hall from 26 August to 13 September 2015, with the Hallé Orchestra acting in the final conducted by Mark Elder.  Russian pianist Anna Tcybuleva won the competition.

Radu Lupu: Radu Lupu, CBE (born November 30, 1945) is a Romanian concert pianist.  He is the winner of three of the most prestigious awards in the field of classical piano, the George Enescu International Piano Competition, Van Cliburn International Piano Competition and Leeds International Pianoforte Competition.

Zhang Zuo (Zee Zee): Zhang Zuo (Chinese: 左章; pinyin: Zuǒ Zhāng, born 10 October 1988), also known by the name “Zee Zee”, is a Chinese pianist, who has won first prize awards at the 1st International Piano Competition in China, the Gina Bachauer International Artists Piano Competition in the United States, the Krainev International Piano Competition in Ukraine, and the Juilliard's 32nd annual William Petschek Piano Recital Award.

Balázs Fülei: Balázs Fülei was born in Kecskemét, Hungary 1984.  He started to learn music at the age of eight, his first teacher was Katonáné Szabó Judit.  In the Bartók Conservatory, Budapest, his professors were Gábor Eckhardt and Balázs Réti, then he made his diploma with honours at the Franz Liszt Academy of Music, Budapest, 2008 in György Nádor, Márta Gulyás and Balázs Réti’s class.  Balázs Fülei was an active participant in prof. Amadeus Webersinke, Florent Boffard, Ferenc Rados, Gábor Csalog, Norma Fischer, Zoltán Kocsis, Bertrand Ott, Jan Marisse Huizing, Jan Wijn, Boris Berman and György Kurtág's piano and chamber music courses.  Balázs Fülei is living an active musical life as a concert pianist, he gave several concerts almost in every country in Europe, in China, Japan, Australia and in the United States.  He was an artist of the International Miami Piano Festival, and the Ferruccio Busoni Festival.  He won the 1st prize on the 10th Hungarian National Piano Competition, and in the Andor Földes Piano Competition of Liszt Academy of Music in 2003.  He was the winner of the 43.  "Arcangelo Speranza" International Piano Competition in Taranto Italy, May 2005, 3rd prize winner of the 25.  International Piano Competition „Ettore Pozzoli” in Milan-Seregno in 2007.  In 2007 Balázs Fülei got a special prize in the 13.  International Tchaikovsky Competition in Moscow.  He was selected twice to the New Masters On Tour by The International Holland Music Sessions in The Netherlands and played in 2007 in the Concertgebouw, Diligentia Den Haag and other capitals in Europe.  He performed in a DVD recording in May 2006 in Tokyo, Japan with the ballades of Chopin and Liszt, then made his New York debut in Carnegie Hall, 2008.  Balázs Fülei plays chamber and contemporary music many times, he played world prémieres of Hungarian composers.  He is an artist of the Starlet Music Management.

Marion Stein: Maria Stein, CBE (Maria Donata Nanetta Paulina Gustava Erwina Wilhelmine; 18 October 19266 March 2014), known as Marion Stein, and subsequently by marriage as Marion Lascelles, Countess of Harewood, and later Marion Thorpe, was an Austrian-born British concert pianist.

Ming-Qiang Li: Li Ming-Qiang (, also spelled "Li Min-Chan") - is a Chinese classical pianist.  He studied under Alfred Wittenberg and Tatiana Kravchenko, and as a young pianist in the late 1950s and early 1960s won awards at several Eastern European music competitions: the Smetana Competition in Prague in 1957 (3rd prize), the George Enescu International Piano Competition in Bucharest in 1958 (1st prize), the International Frederick Chopin Piano Competition (sic) in Warsaw in 1960 (4th prize).  His recordings comprise pieces by the classics and romantics, as well as piano music by Chinese composers.  During the Chinese Cultural Revolution (1966–1976), Li Ming-Qiang was sent to a work farm and allegedly subjected to torture.  Unfortunately, the Cultural Revolution marked the end of his career as a concert pianist, although studio recordings of his performances were made as late as 1982.

Leeds International Piano Competition: The Leeds International Piano Competition, informally known as The Leeds and formerly the Leeds International Pianoforte Competition, takes place every three years in Leeds, West Yorkshire, England.  It was founded in 1961 by Marion, Countess of Harewood, Fanny Waterman, and Roslyn Lyons, with the first competition being held in 1963.  Waterman was the chair and artistic director up to the 2015 competition.  The competition takes place in the Great Hall of the University of Leeds and in Leeds Town Hall.

Josu de Solaun Soto: Josu De Solaun (born October 27, 1981) is a Spanish classical music pianist and winner of the "First Prize" at the XIII George Enescu International Piano Competition, the "First Prize" at the I European Union Piano Competition held in Prague, and the "First Grand Prize" at the XV José Iturbi International Piano Competition.  He is the first and only pianist from Spain to have ever been awarded the coveted prizes in the more than 30 and 50 years of their existence (the Iturbi and Enescu Competitions, founded in 1981 and 1958).  He has resided in New York City since moving there in 1999, at the age of 17, and is a graduate of the Manhattan School of Music, from which he holds a Bachelor of Music, Master of Music and Doctorate in Musical Arts, and where his main teachers were Nina Svetlanova and Horacio Gutiérrez.  In Spain, until the age of 17, his main teacher was Mexican pianist Maria Teresa Naranjo Ochoa.

Supporting paragraphs: Leeds International Piano Competition Marion Stein
Answer: Marion Stein