context: Messi played for Barca, Infantil B and Cadete B & A junior teams from 2000 to 2003 (scoring 37 goals in 30 matches in Cadete A). In the 2003-04 season, he set a record [26] in five different teams: one match in Juvenil B (one goal), and promotion to Juvenil A (14 matches, 21 goals). Then he performed for FC Barcelona C in the Tercera División, on 29 November 2003 and for FC Barcelona B in Segunda División B on 6 March 2004. He played for the teams throughout the season (eight matches, five goals and five matches, without goals) [27] [28] [29]. Even before the debuts, Messi made his first official appearance for the first team on November 16, 2003 at the age of 16 years and 145 days, in a friendly match against FC Porto. [30] [31]
question: When will Lionel Messi enter Barcelona?
answers.text: 2000