Question: What is the occupation of the world's highest paid athlete?

full_context: Document 1: Cristiano Ronaldo: Cristiano Ronaldo dos Santos Aveiro GOIH, ComM (European Portuguese: (kɾiʃˈtjɐnu ʁoˈnaɫdu); born 5 February 1985) is a Portuguese professional footballer who plays as a forward for Spanish club Real Madrid and the Portugal national team. Often considered the best player in the world and widely regarded as one of the greatest of all time, Ronaldo has a record - tying five Ballon d'Or awards, the most for a European player, and is the first player to win four European Golden Shoes. He has won 26 trophies in his career, including five league titles, five UEFA Champions League titles and one UEFA European Championship. A prolific goalscorer, Ronaldo holds the records for most official goals scored in Europe's top - five leagues (395), the UEFA Champions League (120), the UEFA European Championship (9), as well as those for most assists in the UEFA Champions League (34) and the UEFA European Championship (6). He has scored over 650 senior career goals for club and country.
Document 2: Highest-paid NBA players by season: 2018 -- 2019 Player Salary Team Stephen Curry $37,457,154 Golden State Warriors Russell Westbrook $35,665,000 Oklahoma City Thunder Chris Paul $35,654,150 Houston Rockets LeBron James $35,654,150 Los Angeles Lakers Blake Griffin $31,873,932 Detroit Pistons Gordon Hayward $31,214,295 Boston Celtics Kyle Lowry $31,000,000 Toronto Raptors James Harden $30,570,000 Houston Rockets Paul George $30,560,700 Oklahoma City Thunder Mike Conley Jr. $30,521,115 Memphis Grizzlies 2017 -- 2018 Player Salary Team Stephen Curry $34,682,550 Golden State Warriors LeBron James $33,285,709 Cleveland Cavaliers Paul Millsap $30,769,231 Denver Nuggets Gordon Hayward $29,727,900 Boston Celtics Blake Griffin $29,512,900 Los Angeles Clippers / Detroit Pistons Kyle Lowry $28,903,704 Toronto Raptors Mike Conley Jr. $28,530,608 Memphis Grizzlies Russell Westbrook $28,299,399 Oklahoma City Thunder James Harden $28,299,399 Houston Rockets DeMar DeRozan $27,739,975 Toronto Raptors
Document 3: Cristiano Ronaldo: Cristiano Ronaldo dos Santos Aveiro GOIH, ComM (Portuguese pronunciation: (kɾiʃˈtjɐnu ʁoˈnaldu); born 5 February 1985) is a Portuguese professional footballer who plays as a forward for Spanish club Real Madrid and the Portugal national team. Often considered the best player in the world and widely regarded as one of the greatest of all time, Ronaldo has five Ballon d'Or awards, the most for a European player and is tied for most all - time. He is the first player in history to win four European Golden Shoes. He has won 25 trophies in his career, including five league titles, four UEFA Champions League titles and one UEFA European Championship. A prolific goalscorer, Ronaldo holds the records for most official goals scored in the top five European leagues (373), the UEFA Champions League (114), the UEFA European Championship (29) and the FIFA Club World Cup (7), as well as most goals scored in a UEFA Champions League season (17). Cristiano also holds the record for most official assists provided in the UEFA Champions League (36). He has scored more than 600 senior career goals for club and country.
Document 4: Highest-paid NBA players by season: Player Salary Team LeBron James $30,963,450 Cleveland Cavaliers Al Horford $26,540,100 Boston Celtics DeMar DeRozan $26,540,100 Toronto Raptors James Harden $26,540,100 Houston Rockets Kevin Durant $26,540,100 Golden State Warriors Russell Westbrook $26,540,100 Oklahoma City Thunder Mike Conley, Jr. $26,540,100 Memphis Grizzlies Dirk Nowitzki $25,000,000 Dallas Mavericks Carmelo Anthony $24,559,380 New York Knicks Damian Lillard $24,328,425 Portland Trail Blazers
Document 5: Forbes' list of the world's highest-paid athletes: Rank Name Sport Nation Total Salary / Winnings Endorsements Cristiano Ronaldo Football Portugal $93 million $58 million $35 million LeBron James Basketball United States $86.2 million $31.2 million $55 million Lionel Messi Football Argentina $80 million $53 million $27 million Roger Federer Tennis Switzerland $64 million $6 million $58 million 5 Kevin Durant Basketball United States $60.6 million $26.6 million $34 million 6 Andrew Luck American football United States $50 million $47 million $3 million 6 Rory McIlroy Golf Northern Ireland $50 million $16 million $34 million 8 Stephen Curry Basketball United States $47.3 million $12.3 million $35 million 9 James Harden Basketball United States $46.6 million $26.6 million $20 million 10 Lewis Hamilton Auto racing England $46 million $38 million $8 million
Document 6: Highest-paid NBA players by season: Player Salary Team LeBron James $30,963,450 Cleveland Cavaliers Al Horford $26,540,100 Boston Celtics DeMar DeRozan $26,540,100 Toronto Raptors James Harden $26,540,100 Houston Rockets Kevin Durant $26,540,100 Golden State Warriors Russell Westbrook $26,540,100 Oklahoma City Thunder Mike Conley Jr. $26,540,100 Memphis Grizzlies Dirk Nowitzki $25,000,000 Dallas Mavericks Carmelo Anthony $24,559,380 New York Knicks Damian Lillard $24,328,425 Portland Trail Blazers
Document 7: Highest-paid NBA players by season: Player Salary Team Stephen Curry $34,682,550 Golden State Warriors LeBron James $33,285,709 Cleveland Cavaliers Paul Millsap $31,269,231 Denver Nuggets Gordon Hayward $29,727,900 Boston Celtics Blake Griffin $29,512,900 Los Angeles Clippers Kyle Lowry $28,703,704 Toronto Raptors Russell Westbrook $28,530,608 Oklahoma City Thunder Mike Conley, Jr. $28,530,608 Memphis Grizzlies James Harden $28,299,399 Houston Rockets DeMar DeRozan $27,739,975 Toronto Raptors
Document 8: Cristiano Ronaldo: Cristiano Ronaldo dos Santos Aveiro GOIH ComM (European Portuguese: [kɾiʃˈtjɐnu ʁoˈnaɫdu]; born 5 February 1985) is a Portuguese professional footballer who plays as a forward for Italian club Juventus and captains the Portugal national team. Often considered the best player in the world and  widely regarded as one of the greatest players of all time, Ronaldo has a record-tying five Ballon d'Or awards, the most for a European player, and is the first player to win four European Golden Shoes. He has won 29 trophies in his career, including six league titles, five UEFA Champions League's, one UEFA European Championship, and one UEFA Nations League. A prolific goalscorer, Ronaldo holds the records for most official goals scored in the UEFA Champions League (126), the UEFA European Championship (9), as well as those for most assists in the UEFA Champions League (34) and the UEFA European Championship (6). He has scored over 700 senior career goals for club and country.
Document 9: Cristiano Ronaldo: Cristiano Ronaldo dos Santos Aveiro GOIH ComM (European Portuguese: (kɾiʃˈtjɐnu ʁoˈnaɫdu); born 5 February 1985) is a Portuguese professional footballer who plays as a forward for Italian club Juventus and the Portugal national team. Often considered the best player in the world and regarded by many as one of the greatest players of all time, Ronaldo has a record - tying five Ballon d'Or awards, the most for a European player, and is the first player to win four European Golden Shoes. He has won 26 trophies in his career, including five league titles, five UEFA Champions League titles and one UEFA European Championship. A prolific goalscorer, Ronaldo holds the records for most official goals scored in Europe's top - five leagues (402), the UEFA Champions League (120), the UEFA European Championship (9), as well as those for most assists in the UEFA Champions League (34) and the UEFA European Championship (6). He has scored over 680 senior career goals for club and country.
Document 10: Highest-paid NBA players by season: Player Salary Team Stephen Curry $34,682,550 Golden State Warriors LeBron James $33,285,709 Cleveland Cavaliers Paul Millsap $30,769,231 Denver Nuggets Gordon Hayward $29,727,900 Boston Celtics Blake Griffin $29,512,900 Los Angeles Clippers / Detroit Pistons Kyle Lowry $28,903,704 Toronto Raptors Mike Conley Jr. $28,530,608 Memphis Grizzlies Russell Westbrook $28,299,399 Oklahoma City Thunder James Harden $28,299,399 Houston Rockets DeMar DeRozan $27,739,975 Toronto Raptors
Document 11: Cristiano Ronaldo: Cristiano Ronaldo dos Santos Aveiro GOIH, ComM (European Portuguese: (kɾiʃˈtjɐnu ʁoˈnaɫdu); born 5 February 1985) is a Portuguese professional footballer who plays as a forward for Spanish club Real Madrid and the Portugal national team. Often considered the best player in the world and regarded by many as the greatest of all time, Ronaldo has a record - tying five Ballon d'Or awards, the most for a European player, and is the first player to win four European Golden Shoes. He has won 25 trophies in his career, including five league titles, four UEFA Champions League titles and one UEFA European Championship. Both a prolific goalscorer and playmaker, Ronaldo holds the records for most official goals scored in Europe's top - five leagues (393), the UEFA Champions League (120), the UEFA European Championship (29), as well as those for most assists in the UEFA Champions League (34) and the UEFA European Championship (8). He has scored over 650 senior career goals for club and country.
Document 12: Cristiano Ronaldo: Cristiano Ronaldo dos Santos Aveiro GOIH ComM (European Portuguese: (kɾiʃˈtjɐnu ʁoˈnaɫdu); born 5 February 1985) is a Portuguese professional footballer who plays as a forward for Spanish club Real Madrid and the Portugal national team. Often considered the best player in the world and widely regarded as one of the greatest of all time, Ronaldo has a record - tying five Ballon d'Or awards, the most for a European player, and is the first player to win four European Golden Shoes. He has won 26 trophies in his career, including five league titles, five UEFA Champions League titles and one UEFA European Championship. A prolific goalscorer, Ronaldo holds the records for most official goals scored in Europe's top - five leagues (395), the UEFA Champions League (120), the UEFA European Championship (9), as well as those for most assists in the UEFA Champions League (34) and the UEFA European Championship (6). He has scored over 670 senior career goals for club and country.
Document 13: Cristiano Ronaldo: Cristiano Ronaldo dos Santos Aveiro GOIH ComM (European Portuguese: (kɾiʃˈtjɐnu ʁoˈnaɫdu); born 5 February 1985) is a Portuguese professional footballer who plays as a forward for Italian club Juventus and the Portugal national team. Often considered the best player in the world and regarded by many as one of the greatest players of all time, Ronaldo has a record - tying five Ballon d'Or awards, the most for a European player, and is the first player to win four European Golden Shoes. He has won 26 trophies in his career, including five league titles, five UEFA Champions League titles and one UEFA European Championship. A prolific goalscorer, Ronaldo holds the records for most official goals scored in Europe's top - five leagues (395), the UEFA Champions League (120), the UEFA European Championship (9), as well as those for most assists in the UEFA Champions League (34) and the UEFA European Championship (6). He has scored over 670 senior career goals for club and country.
Document 14: Sports Illustrated: Athlete Sport Number of covers Michael Jordan Basketball 50 Muhammad Ali Boxing 40 LeBron James Basketball 25 Tiger Woods Golf 24 Magic Johnson Basketball 23 Kareem Abdul - Jabbar Basketball 22 Tom Brady Football 20
Document 15: Forbes' list of the world's highest-paid athletes: Rank Name Sport Nation Total Salary / Winnings Endorsements Cristiano Ronaldo Association football Portugal $93 million $58 million $35 million LeBron James Basketball United States $86.2 million $31.2 million $55 million Lionel Messi Association football Argentina $80 million $53 million $27 million Roger Federer Tennis Switzerland $64 million $6 million $58 million 5 Kevin Durant Basketball United States $60.6 million $26.6 million $34 million 6 Andrew Luck American football United States $50 million $47 million $3 million 6 Rory McIlroy Golf Northern Ireland $50 million $16 million $34 million 8 Stephen Curry Basketball United States $47.3 million $12.3 million $35 million 9 James Harden Basketball United States $46.6 million $26.6 million $20 million 10 Lewis Hamilton Auto racing England $46 million $38 million $8 million
ground_truth: a Portuguese professional footballer
sub_queries: who is the world's highest paid athlete Answer: Cristiano Ronaldo
Who is Cristiano Ronaldo ? Answer: a Portuguese professional footballer