Question: Elkhan Mammadov is the project leader for a bid to host which edition of UEFA European Championship ?

Context paragraphs:
2019 UEFA European Under-21 Championship: The 2019 UEFA European Under-21 Championship (also known as UEFA Under-21 Euro 2019) will be the 22nd edition of the UEFA European Under-21 Championship (25th edition if the Under-23 era is also included), the biennial international youth football championship organised by UEFA for the men's under-21 national teams of Europe.  The final tournament will be hosted in Italy and San Marino in mid-2019, after their bid was selected by the UEFA Executive Committee on 9 December 2016 in Nyon, Switzerland.

Christophe Lambert (judoka): Christophe Lambert (born 3 June 1985 in Braunschweig, Germany) is a German judoka.  He competed at the 2012 Summer Olympics in the -90 kg event and lost in the first round to Elkhan Mammadov.  Lambert won the bronze medal at the 2012 European Judo Championships.

Sport in Belgium: Sport in Belgium plays a prominent role in the society.  As of 2010, Belgium counted around 17,000 sport clubs with approximately 1.35 million members, thus 13% of the Belgian population is involved in sport.  Popular sports in Belgium are among others football, cycling, tennis, table tennis, athletics, swimming, basketball, badminton, judo, hockey, motocross, auto racing, volleyball and running.  Belgium has organized the 1920 Olympic Games in Antwerp as well as the 1972 UEFA European Championship and the 2000 UEFA European Championship along with the Netherlands.  The Belgium national football team best result was a 4th place at the 1986 FIFA World Cup and a second place of the 1980 UEFA European Championship.  Belgian football clubs have won 3 times the UEFA Cup Winners Cup and twice the UEFA Cup, plus 3 times the UEFA Supercup.

UEFA Euro 2020: The 2020 UEFA European Football Championship, commonly referred to as UEFA Euro 2020 or simply Euro 2020, will be the 16th edition of the UEFA European Championship, the quadrennial international men's football championship of Europe organized by UEFA.

UEFA Euro 2016: The 2016 UEFA European Championship, commonly referred to as UEFA Euro 2016 or simply Euro 2016, was the 15th UEFA European Championship, the quadrennial international men's football championship of Europe organised by UEFA.  It was held in France from 10 June to 10 July 2016.  Spain were the two-time defending champions, having won the 2008 and 2012 tournaments, but were eliminated in the round of 16 by Italy.  Portugal won the tournament for the first time, following a 1–0 victory after extra time over the host team, France, in the final played at the Stade de France.

Turkey national under-19 football team: The Turkey national under-19 football team is the national under-19 football team of Turkey and is controlled by the Turkish Football Federation.  The team competes in the UEFA European Under-19 Football Championship, held every year.  The Under-19 UEFA tournament originally began as the FIFA Junior Tournament between 1948-54.  It has since been renamed a number of times, most notably referred to as the UEFA European U-18 Championship between 1981-2001.  The tournament was renamed as the UEFA European U-19 Championship in 2002, but importantly the overall statistics are collated from 1948.  In addition, every even year, the top five teams from the respective UEFA European Under-19 Football Championship compete in the FIFA U-20 World Cup the following year.

UEFA Euro 2004: The 2004 UEFA European Championship, commonly referred to as UEFA Euro 2004 or simply Euro 2004, was the 12th edition of the UEFA European Championship, a quadrennial football competition contested by the men's national teams of UEFA member associations.  The final tournament was hosted for the first time in Portugal, from 12 June to 4 July 2004, after their bid was selected on 12 October 1999, over those of Spain and Austria/Hungary.  A total of thirty-one matches were played in ten venues across eight cities – Aveiro, Braga, Coimbra, Guimarães, Faro/Loulé, Leiria, Lisbon and Porto.

Elkhan Mammadov (official): Elkhan Mammadov is a General Secretary of Association of Football Federations of Azerbaijan (AFFA), Project Leader for UEFA EURO 2020 Baku Bid, Vice-President of UEFA Fair Play and Social Responsibility Committee, FIFA Fair Play and Social Responsibility Committee Member.

Cristiano Ronaldo: Cristiano Ronaldo dos Santos Aveiro (] ; born 5 February 1985) is a Portuguese professional footballer who plays as a forward for Spanish club Real Madrid and the Portugal national team.  Often considered the best player in the world and widely regarded as one of the greatest of all time, Ronaldo has four FIFA Ballon d'Or awards, the most for a European player, and is the first player in history to win four European Golden Shoes.  He has won 24 trophies in his career, including five league titles, four UEFA Champions League titles and one UEFA European Championship.  A prolific goalscorer, Ronaldo holds the records for most official goals scored in the top five European leagues (372), the UEFA Champions League (109) and the UEFA European Championship (29), as well as the most goals scored in a UEFA Champions League season (17).  He has scored more than 600 senior career goals for club and country.

Wales at the UEFA European Championship: This is a record of Wales' results at the UEFA European Championship.  The UEFA European Championship, previously known at European Nations' Cup, is an international association football competition contested by the men's national teams of the members of "Union of European Football Associations" (UEFA), the administrative body for association football in Europe.  The championship has been awarded every four years, since the first tournament in 1960.

Supporting paragraphs: Elkhan Mammadov (official) UEFA Euro 2020
Answer: 16th edition