Question: SV Werder Bremen won its first ever German double, clinching both Bundesliga and the DFB-Pokal, Werder lost both Aílton and defensive senior talisman Mladen Krstajić to Schalke 04, Krstajić is a former Serbian footballer who played as a centre back, born on which date?

full_context: Document 1: Mario Mandžukić: Mario Mandžukić (; born 21 May 1986) is a Croatian professional footballer who plays as a forward for Italian club Juventus and the Croatia national team. Besides being a prolific goalscorer, he is known for his great defensive contribution and aerial power.
Document 2: 2003–04 Bayer 04 Leverkusen season: Bayer 04 Leverkusen bounced back from the nearly disastrous season it came from, finishing in the top three and qualifying for the UEFA Champions League in the process. The season marked the breakthrough for Bulgarian striker Dimitar Berbatov, who scored 16 goals, whereas Brazilian signing França contributed with 14 strikes. As it was, it was the attack that impressed the most, especially in the 6–2 crushing of champions Werder Bremen on the penultimate day of the season.
Document 3: 2003–04 SV Werder Bremen season: SV Werder Bremen won its first ever German double, clinching both Bundesliga and the DFB-Pokal. Following a club record-breaking league season, Werder won the title six points clear of Bayern Munich, with Aílton hitting 28 goals, the most ever from a Werder Bremen player. The cup victory was clinched following a 3–2 win against Alemannia Aachen, with defensive midfielder Tim Borowski the unexpected hero, hitting Alemannia with a brace. The title successes were Thomas Schaaf's first in his managerial career. However, Werder lost both Aílton and defensive senior talisman Mladen Krstajić to Schalke 04, since both refused to sign new contracts with the club.
Document 4: Luka Milivojević: Luka Milivojević (Serbian Cyrillic: Лука Миливојевић; born 7 April 1991) is a Serbian professional footballer who plays as a midfielder for Premier League club Crystal Palace and the Serbia national team.
Document 5: 2003–04 VfL Wolfsburg season: VfL Wolfsburg started the season in brilliant fashion, taking an early Bundesliga lead, before slipping back in a nightmare run, which saw the team finish in the midfield, with a lower points haul than the previous seasons. Wolfsburg also dropped a bombshell when they signed Argentine starlet Andrés D'Alessandro of River Plate. D'Alessandro had been relatively disappointing season, but Fernando Baiano together with Diego Klimowicz made sure the attack functioned really well.
Document 6: Milan Kristić: Milan Kristić was the a Yugoslav football coach who managed the Tunisia national football team from 1960 to 1961. He led the Tunisian side which competed in the 1960 Summer Olympics, where they suffered three defeats to Poland, Argentina and Denmark and exited the tournament in the group stage.
Document 7: 2008–09 VfL Wolfsburg season: VfL Wolfsburg won their first ever Bundesliga title during this season. Manager Felix Magath formed an attacking lineup, which included strikers Edin Džeko and Grafite, the pair scoring 54 goals between them, much due to the help of attacking midfielder Zvjezdan Misimović's 20 assists.
Document 8: Branko Milosevic: Branko Milosevic (born 21 August 1964) is a midfielder who made several appearances for the Socceroos. Milosevic was known for his extremely fast bursts of speed, vision, goal scoring ability, positioning, work rate, distribution and skill with the ball. He is currently manager of South Australian Super League outfit Raiders.
Document 9: Sedin Torlak: Sedin Torlak (born 12. January 1985 in Sarajevo) is a Bosnian football defender, who last played for FK Olimpic. He got a call up from Bosnian National Team Coach Miroslav Blažević for a game against Armenia. Furthermore, he developed to one of the most important players of FK Sarajevo, especially on the defensive end. He is also pretty dominant in the air. In cup games against FK Rudar Prijedor (4:5) Sedin Torlak recorded 100th appearance for FK Sarajevo.
Document 10: Mladen Krstajić: Mladen Krstajić (Serbian Cyrillic: Младен Крстајић; born 4 March 1974) is a former Serbian footballer who played as a centre back. He was known for his composure, leadership and defensive ability. He represented Serbia and Montenegro at the 2006 FIFA World Cup.
Document 11: Zlatko Krdžević: Zlatko Krdžević (, born 3 December 1959) is a former Serbian football player, from the 1980s.
Document 12: 2007–08 VfL Wolfsburg season: VfL Wolfsburg had their best ever season under new coach Felix Magath. The double Bundesliga-winning coach from Bayern Munich improved the fortunes of Wolfsburg from a relegation-threatened side to a fifth place-finish. This was just the start of a sensational ascent to the top of German football, culminating in a shock title win the season afterwards. New signings Diego Benaglio, Josué, Grafite and Edin Džeko were all successful and played a big part in the resurgence.
Document 13: 2007–08 FC Bayern Munich season: Prior to the beginning of the 2007–08 season, Bayern Munich underwent a major restructuring of the team, releasing or retiring nine players while adding ten others to the squad, most notably Luca Toni and Franck Ribéry. The season started with Bayern winning the DFB-Ligapokal, followed by a shootout win in the DFB-Pokal against Wacker Burghausen on 6 August 2007. On the first day of the 2007–08 Bundesliga season, Bayern achieved a 3–0 victory over Hansa Rostock. As the season progressed, Bayern continued in first in the league table, eventually winning the championship. Bayern also won the 2007–08 DFB-Pokal, thereby completing the double. International success was thwarted by Zenit Saint Petersburg, however, when Bayern suffered a 4–0 defeat in the second leg of the semi-final after a draw at home. The 2007–08 season was goalkeeper Oliver Kahn's last season with Bayern.
Document 14: 2010 DFB-Pokal Final: The 2009–10 DFB-Pokal season came to a close on 15 May 2010 when Bayern Munich played defending champions Werder Bremen at the Olympiastadion in Berlin. Bayern thrashed Bremen 4-0 with goals from Robben, Olić, Ribéry, and Schweinsteiger. The title capped off a successful season, with Bayern winning the domestic double of the Fußball-Bundesliga and the DFB-Pokal. These successes were Bayern's 22nd league and 15th cup titles. Bayern were also in line for "The Treble" but lost to Internazionale of Milan, 2-0 in the Champions League Final at Madrid's Santiago Bernabéu Stadium on 22 May.
Document 15: 2005–06 FC Bayern Munich season: FC Bayern Munich won the domestic double, beating Werder Bremen by five points in Bundesliga, and defeating Eintracht Frankfurt 1–0 in the DFB-Pokal final, thanks to a goal from Claudio Pizarro. The season was in spite of that tainted due to a big defeat to Milan in the UEFA Champions League, losing out 5–2 on aggregate in the Last 16. At the end of the season, Bayern signed German football's wonderkid Lukas Podolski from Köln.
ground_truth: 4 March 1974