Question: What is the nationality of the top scorer of the 2012–13 Primeira Liga?

Context articles: 2013–14 Primeira Liga
Jackson Martínez
2012–13 Taça da Liga (Third Round)
2011–12 Primeira Liga
2012–13 Primeira Liga
2010–11 Primeira Liga
1999–2000 Primeira Liga
2012–13 Taça da Liga
2012–13 Segunda Liga
LPFP Primeira Liga Player of the Year

The 2013–14 Primeira Liga (also known as Liga ZON Sagres for sponsorship reasons) was the 80th season of the Primeira Liga, the top professional league for Portuguese association football clubs.
 It began on 18 August 2013 and concluded on 11 May 2014.
 Sixteen teams contested the league, fourteen of which took part in the previous season and two of which were promoted from the Segunda Liga.
 On 20 April 2014, Benfica won the Primeira Liga for a record 33rd time with a 2–0 victory over Olhanense, with two games to spare.
Jackson Arley Martínez Valencia (] ; born 3 October 1986) is a Colombian professional footballer who plays as a striker for Chinese club Guangzhou Evergrande Taobao and the Colombian national team.
The 2012–13 Taça da Liga third round matches were played between December 2012 and January 2013.
 The eight winners of the second round matches progressed to this round and were joined by the teams that finished in the top half of the 2012–13 Primeira Liga.
 The 16 teams were seeded according to their league position in the previous season and drawn into four groups, where they played each other in a round-robin format.
 The matchdays took place on 18–19 December, 29–30 December 2012 and 2 January 2013, and 9 January 2013.
 The winners of each group progressed to the semi-finals to be played on 27 February 2013.
The 2011–12 Primeira Liga (also known as Liga ZON Sagres for sponsorship reasons) was the 78th season of the Primeira Liga, the top professional league for Portuguese association football clubs.
 It began on 14 August 2011 and ended on 13 May 2012.
 A total of 16 teams contested the league, 14 of which already took part in the previous season and two of which were promoted from the Liga de Honra.
 Porto were the defending champions and secured their 26th and second consecutive league title.
 Óscar Cardozo and Lima, respectively Benfica's and Braga's strikers, were the joint top scorers with 20 goals.
The 2012–13 Primeira Liga (also known as Liga ZON Sagres for sponsorship reasons) was the 79th season of the Primeira Liga, the top professional league for Portuguese association football clubs.
 It began on 19 August 2012 and concluded on 19 May 2013.
 Sixteen teams contested the league, fourteen of which took part in the previous season and two of which were promoted from the Liga de Honra.
 Porto were the defending champions and secured their third consecutive and 27th overall title, after completing their second unbeaten season in three years.
 Porto striker Jackson Martínez was the top scorer with 26 goals.
The 2010–11 Primeira Liga (also known as Liga ZON Sagres for sponsorship reasons) was the 77th season of the Primeira Liga, the top professional league for Portuguese association football clubs.
 It began on 15 August 2010 and ended on 14 May 2011.
 A total of 16 teams contested the league, 14 of which already took part in the previous season and two of which were promoted from the Liga de Honra.
 Benfica were the defending champions but finished runners-up to Porto, who won their 25th league title in the club's first-ever unbeaten season.
 Porto's forward Hulk was the top scorer with 23 goals.
The 1999–2000 Primeira Liga was the 66th season of top-tier football in Portugal.
 The competition was renamed Campeonato Nacional da Primeira Liga (National Championship of the First League), Primeira Liga for short, after the Portuguese League for Professional Football took control of the two top nationwide leagues in 1999.
 It started on 20 August 1999 and ended on 14 May 2000.
 The league was contested by 18 clubs with Porto as the defending champions.
The 2012–13 Taça da Liga was the sixth edition of the Taça da Liga, the Portuguese football league cup competition.
 It was organized by the Portuguese League for Professional Football (LPFP) and contested between the 32 clubs competing in the 2012–13 Primeira Liga and 2012–13 Segunda Liga, the top two tiers of Portuguese football.
 The first matches were played on 28 July 2012, and the final was played on Estádio Cidade de Coimbra in Coimbra, on 13 April 2013.
The 2012–13 Segunda Liga was the 23rd season of the second-tier of football in Portugal.
 This season marked a series of changes in the league overall.
 The league's name was changed back to Segunda Liga from the previous Liga de Honra.
 A total of 22 teams contested the league, up from 16 in the previous season; 14 of which contested the 2011–12 season, two of which were promoted from the Portuguese Second Division (including a reserve team), one of which was relegated from the 2011–12 Primeira Liga, and five of which were new reserve teams of Primeira Liga clubs.
 The reserve teams were not eligible for promotion to the Primeira Liga.
The Portuguese League for Professional Football Primeira Liga Player of the Year (often called the LPFP Primeira Liga Player of the Year, the Primeira Liga Player of the Year or simply the Player of the Year) is an annual award given to the player who is adjudged to have been the best of the year in Primeira Liga.
 Between 2006 and 2010 the winner was chosen only by a vote amongst the members of Sports National Press Club (CNID).
 Since 2011, thanks to new sponsorship agreements, all the awards related to football belong to Portuguese League for Professional Football (LPFP) and are chosen by a vote amongst their associated.