Question: Who organized the 2016 warm-up tournament to the biennial internation men's youth football championship?
Context: The 2017 UEFA European Under-21 Championship (also known as UEFA Under-21 Euro 2017) was the 21st edition of the UEFA European Under-21 Championship, a biennial international youth football championship organised by UEFA for the men's under-21 national teams of Europe.  The final tournament was hosted in Poland for the first time, after their bid was selected by the UEFA Executive Committee on 26 January 2015 in Nyon, Switzerland.  The tournament took place from 16–30 June 2017.  Players born on or after 1 January 1994 were eligible for the tournament. The 2016 AFC U-16 Championship was the 17th edition of the AFC U-16 Championship, the biennial international youth football championship organised by the Asian Football Confederation (AFC) for the men's under-16 national teams of Asia.  The tournament was held in India, as announced by the AFC on 3 June 2015, and was played between 15 September and 2 October 2016.  A total of 16 teams will play in the tournament. The 2017 South American Youth Football Championship (Spanish: Campeonato Sudamericano Sub-20 "Juventud de América" Ecuador 2017 , Brazilian Portuguese: Campeonato Sul-Americano Sub-20 "Juventude da América" Ecuador 2017 ) was the 28th edition of the South American Youth Football Championship, a football competition for the under-20 national teams in South America organized by CONMEBOL.  It was held in Ecuador from 18 January to 11 February 2017. The 2017 FIFA U-17 World Cup will be the 17th edition of the FIFA U-17 World Cup, the biennial international men's youth football championship contested by the U17 national teams of the member associations of FIFA.  The tournament will be hosted by India between 6th and 28 October 2017.  This will be the first FIFA tournament hosted by the country.  The final will be held at the Salt Lake Stadium in Kolkata on 28 October 2017. The 2016 OFC U-17 Women's Championship was the 3rd edition of the OFC U-17 Women's Championship, the biennial international youth football championship organised by the Oceania Football Confederation (OFC) for the women's under-17 national teams of Oceania.  The tournament was held in the Cook Islands between 13–23 January 2016.  The tournament, which returned after the previous edition in 2014 was cancelled, was originally scheduled to be held between 13–28 September 2015. Five Nations U-16 Football Championship 2016 is a warm up tournament for the 2017 FIFA U-17 World Cup.  It is organaising by All India Football Federation (AIFF).  This tournament will be played on May 16–25 at the Tilak Maidan Stadium in Vasco.  A total of 5 Nations U-16 team participated in the tournament The 2015 South American Youth Football Championship (Spanish: Campeonato Sudamericano Sub-20 "Juventud de América" Uruguay 2015 , Brazilian Portuguese: Campeonato Sulamericano Sub-20 "Juventude da América" Uruguai 2015 ) was the 27th edition of the biennial international youth football tournament organized by CONMEBOL for players aged 20 and below.  It was held in Uruguay from 14 January to 7 February 2015. The 2016 AFC U-19 Championship qualification decided the participating teams of the 2016 AFC U-19 Championship.  The tournament is the 39th edition of the AFC U-19 Championship, the biennial international youth football championship organised by the Asian Football Confederation (AFC) for the men's under-19 national teams of Asia. The 2016 AFC U-16 Championship qualification decided the participating teams of the 2016 AFC U-16 Championship.  The tournament is the 17th edition of the AFC U-16 Championship, the biennial international youth football championship organised by the Asian Football Confederation (AFC) for the men's under-16 national teams of Asia. The 2016 AFC U-19 Championship was the 39th edition of the AFC U-19 Championship, the biennial international youth football championship organised by the Asian Football Confederation (AFC) for the men's under-19 national teams of Asia.  The tournament was hosted by Bahrain, as announced by the AFC on 3 June 2015, and was scheduled to be played between 13–30 October 2016.  A total of 16 teams played in the tournament.
Answer: All India Football Federation