Question: The 1997–98 FC Barcelona season began with the addition of the striker who was of what nationality?

full_context: Document 1: Anderson Roberto da Silva Luiz: Anderson Roberto da Silva Luiz (born February 1, 1978), known simply Anderson is a retired Brazilian footballer who played as striker.
Document 2: Ayrton Senna: Ayrton Senna da Silva (] ; 21 March 1960 – 1 May 1994) was a Brazilian racing driver who won three Formula One world championships for McLaren in 1988, 1990 and 1991, and is widely regarded as one of the greatest Formula One drivers of all time. He died in an accident while leading the 1994 San Marino Grand Prix for Williams.
Document 3: Shandon Anderson: Shandon Rodriguez Anderson (born December 31, 1973) is an American retired professional basketball player who played in the National Basketball Association (NBA) from 1996 to 2006. Growing up in Atlanta, Anderson attended the University of Georgia and played for four teams during his ten-year NBA career after being drafted by the Utah Jazz in 1996: the Jazz, Houston Rockets, New York Knicks, and Miami Heat. He played the shooting guard and small forward positions.
Document 4: 1998–99 FC Barcelona season: During the 1998–99 FC Barcelona season, the club once again retained the La Liga title, but eliminated by Valencia in the round of 16 of Copa del Rey. Barcelona enjoyed a great season with their new signings Ronald de Boer, Patrick Kluivert, Frank de Boer, Mauricio Pellegrino, Boudewijn Zenden and Phillip Cocu. Barcelona's league start was slower in early season but Barcelona turnaround to secure La Liga in late-May, but Barcelona crashed out of the UEFA Champions League, following an another lackluster performance in the First Group Phase.
Document 5: 1993–94 FC Barcelona season: FC Barcelona had one of its most successful seasons in the club's history, retaining the domestic league supremacy and reaching the final of the UEFA Champions League; however they collapsed 0-4 against AC Milan (goals from Daniele Massaro, Dejan Savićević and Marcel Desailly). Their progress to the final in Athens had been virtually flawless. Indeed on their way the Catalans had won four group games and drawn two to reach the semifinals, where they defeated FC Porto in a single-game tie at Camp Nou.
Document 6: 2001–02 FC Barcelona season: Futbol Club Barcelona's 2001–02 season was to be the last but one under the guidance of Joan Gaspart as president and the single season of management by Carles Rexach at Barcelona. It was also the first season after long-serving captain Josep Guardiola moved on from the club. Veteran players like Sergi Barjuán, Abelardo and the talismanic Rivaldo would play their final years at the club before a summer of change. The club attained a respectable fourth place in the league, 11 points below eventual winners Valencia, as well as reaching the semi-finals of the UEFA Champions League. Patrick Kluivert was the club's top scorer in all competitions, with 25 goals.
Document 7: Talisca: Anderson Souza Conceição (born 1 February 1994), known as Anderson Talisca or simply Talisca, is a Brazilian professional footballer who plays for Turkish club Beşiktaş, on loan from Portuguese club Benfica. He can play as an attacking midfielder or a forward.
Document 8: Sonny Anderson: Anderson da Silva (born 19 September 1970), known as Sonny Anderson, is a Brazilian retired footballer who played as a striker.
Document 9: 2004–05 FC Barcelona season: The 2004-05 season saw Fútbol Club Barcelona end their six-year wait for the La Liga title, having not won the league or, indeed, any trophy since the 1998–99 season and thus La Liga trophy returned in Barcelona's trophy room. Having finished second in La Liga the previous season, Barcelona once again competed in the UEFA Champions League as well as the Copa del Rey. The squad was restructured significantly following the retirement of key players Luis Enrique and Marc Overmars, as well as the return of Edgar Davids to Juventus and first team regulars Patrick Kluivert and Phillip Cocu moving onto new clubs. Ronaldinho's and new signing Samuel Eto'o's performances won them places in FIFPro's XI of 2004–05. Ronaldinho was later named FIFA World Player of the Year for 2005 for the second time in succession and with the highest points total ever; Eto'o came third. This season was also notable for the debut of Lionel Messi.
Document 10: 2008–09 FC Barcelona season: In 2008–09, Futbol Club Barcelona started a new era with a new manager, former player and Barcelona Atlètic coach Pep Guardiola, who led the team to the first treble in Spanish football history. After selling off high-profiled players such as Deco and Ronaldinho, Barcelona played scintillating football throughout the season, winning the Copa del Rey, La Liga and the UEFA Champions League. This Barcelona squad is considered as one of the best in history.
Document 11: George Anderson (footballer, born 1879): George Edward Anderson (29 November 1879–1962), sometimes known as Teddy Anderson, was an English professional footballer born in Sunderland who played as an outside left. He made 74 appearances for Birmingham in the Football League and went on to play for Brentford of the Southern League.
Document 12: Anderson Silva: Anderson da Silva (] ; born April 14, 1975) is a Brazilian mixed martial artist and former UFC Middleweight Champion. Silva holds the longest title streak in UFC history, which ended in 2013 after 2,457 days, with 16 consecutive wins and 10 title defenses. He has 13 post-fight bonuses, the second most in UFC history. UFC president Dana White and several mixed-martial-arts publications have called Silva the greatest mixed martial artist of all time. He is currently ranked the #6 contender in official UFC middleweight rankings.
Document 13: Robinho: Robson de Souza (] ] , born 25 January 1984), more commonly known as Robinho (] ), is a Brazilian professional footballer who plays for Atlético Mineiro and the Brazil national team as a forward. He is known for his ball control, attacking instinct and dribbling.
Document 14: 1997–98 FC Barcelona season: FC Barcelona returned to its previous glorious league ways under the guidance of new coach Louis van Gaal. The highly rated coach, hired from Ajax Amsterdam, brought lethal striker Sonny Anderson and the attacking midfielder Rivaldo with him. But surprisedly Barcelona sold Ronaldo to Inter Milan just before season begin and thus handed Sonny Anderson as main striker. He introduced Barcelona to his marvelous 4-3-3 formation, in which Rivaldo was a perfect centre forward, scoring 20 goals in the league. Under van Gaal at helm on his first season, Barcelona won their 15th La Liga title, 2nd European Super Cup title as well as 24th Copa del Rey title (thus winning their domestic double) but Barcelona crashed out of the UEFA Champions League, following a lackluster performance in the First Group Phase. In fact, Barcelona ended up last in the group, and was not even qualifying for the remainder of the UEFA Cup, contributing only single victory, two draws and three defeats and thus preventing Barcelona's first treble glory.
Document 15: 2000–01 FC Barcelona season: Barcelona lost their supremacy of Spanish football, finishing just fourth in La Liga, despite having bought Marc Overmars and Emmanuel Petit in total of £54m transfer fee in the summer of 2000. While Barcelona was controversially sold Luís Figo to arch rivals Real Madrid in July 2000. New coach Lorenzo Serra Ferrer was not improved well and put under increasing pressure, and when Barcelona narrowly missed out on Champions League qualification in the summer, he was sacked in late April 2001. Barcelona dramatically sealed Champions League 3rd qualifying spot in the season finale, thanks to Rivaldo bicycle kick goal against Valencia.
ground_truth: Brazilian