user: You are a structured reasoning expert tasked with solving problems step by step. 
You first think about the reasoning process in the mind and then provide the answer. The reasoning process and answer should be enclosed within <think> </think> and <answer> </answer> tags, respectively, i.e., <think> reasoning process here </think> <answer> answer here </answer>. 
Given a question and the associated knowledge graph triplets (entity, relation, entity), you are asked to answer the question with these triplets and your own knowledge. 
You can break down the original question into several sub-questions and explore the given knowledge graph to solve them step-by-step. If there are multiple possible answers, choose one as the final answer. 
After thinking, when you finally reach a conclusion, clearly state the answer within <answer> </answer> tags, i.e., <answer> answer here </answer>. 
Question: Who has been coaching the Carolina Panthers since 1989? 
Knowledge Triplets: Carolina Panthers at New Orleans Saints, 2009-11-08, american_football.football_game.home_team, New Orleans Saints
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.0794jww
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.0794925
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38g7
Carolina Panthers, american_football.football_team.historical_coaching_staff, m.04xg_yc
m.04xg_yc, american_football.football_historical_coach_position.team, Carolina Panthers
Carolina Panthers at Tampa Bay Buccaneers, 2009-10-18, american_football.football_game.away_team, Carolina Panthers
Philadelphia Eagles at Carolina Panthers, 2009-09-13, american_football.football_game.away_team, Philadelphia Eagles
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.passing, m.07948xb
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at Dallas Cowboys, 2009-09-28
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at Tampa Bay Buccaneers, 2009-10-18
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.receiving, m.07mlfxg
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.079458k
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.receiving, m.07949rz
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.0794h0q
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38hm
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.home_team, Tampa Bay Buccaneers
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.0794810
Carolina Panthers at Green Bay Packers, 2008-11-30, american_football.football_game.home_team, Green Bay Packers
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.0794h3n
Carolina Panthers, common.topic.notable_types, Professional Sports Team
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.passing, m.079451x
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.0794jx6
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38fx
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.receiving, m.07mlg8y
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.07947z7
Carolina Panthers at Atlanta Falcons, 2009-09-20, common.topic.notable_for, g.125cnxp6m
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.receiving, m.07mlg5w
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.receiving, m.07mlfyw
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers, american_football.football_team.home_games, Kansas City Chiefs at Carolina Panthers, 2008-10-05
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.0794h34
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.0794h1c
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.away_team, Carolina Panthers
m.04xg_yl, american_football.football_historical_coach_position.coach, George Seifert
Carolina Panthers at Dallas Cowboys, 2009-09-28, common.topic.notable_for, g.125crtfpw
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12
m.0_3r22s, sports.sports_team_coach_tenure.coach, John Fox
Chicago Bears at Carolina Panthers, 2008-09-14, american_football.football_game.away_team, Chicago Bears
Carolina Panthers at Minnesota Vikings, 2008-09-21, american_football.football_game.home_team, Minnesota Vikings
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.home_team, Atlanta Falcons
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.receiving, m.07mlfz6
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.passing, m.07mlg1g
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38hz
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.0794jw1
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.0794h2d
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.receiving, m.07mlg47
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.0794h4m
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.07948_x
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at New York Giants, 2009-12-27
Carolina Panthers, american_football.football_team.home_games, New Orleans Saints at Carolina Panthers, 2010-01-03
Carolina Panthers, american_football.football_team.historical_coaching_staff, m.04xg_yl
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, common.topic.notable_for, g.125fg890p
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.07947yf
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers, american_football.football_team.historical_coaching_staff, m.0j81th4
Carolina Panthers at Dallas Cowboys, 2009-09-28, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.receiving, m.07mlg55
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38c0
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.rushing, m.079452y
New England Patriots, american_football.football_team.home_games, Carolina Panthers at New England Patriots, 2009-12-13
Detroit Lions at Carolina Panthers, 2008-11-16, american_football.football_game.home_team, Carolina Panthers
Carolina Panthers at Oakland Raiders, 2008-11-09, american_football.football_game.home_team, Oakland Raiders
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.receiving, m.07949sz
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at Arizona Cardinals, 2009-11-01
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.passing, m.09g3885
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.passing, m.0794gy8
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.receiving, m.07mlfxt
Carolina Panthers at Oakland Raiders, 2008-11-09, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.receiving, m.07mlfyh
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.receiving, m.07mlfx3
Carolina Panthers at New Orleans Saints, 2008-12-28, common.topic.notable_for, g.125bq2bh0
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at Green Bay Packers, 2008-11-30
Carolina Panthers, sports.sports_team.sport, American football
Atlanta Falcons at Carolina Panthers, 2009-11-15, american_football.football_game.away_team, Atlanta Falcons
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.079490b
Carolina Panthers, american_football.football_team.home_games, Detroit Lions at Carolina Panthers, 2008-11-16
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.passing, m.0794jmf
Atlanta Falcons at Carolina Panthers, 2008-09-28, american_football.football_game.away_team, Atlanta Falcons
Carolina Panthers at Tampa Bay Buccaneers, 2009-10-18, american_football.football_game.home_team, Tampa Bay Buccaneers
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.passing, m.07mlfpf
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.0794560
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.079456x
Carolina Panthers, american_football.football_team.home_games, Denver Broncos at Carolina Panthers, 2008-12-14
Carolina Panthers at New Orleans Saints, 2009-11-08, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.receiving, m.0793455
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.receiving, m.07949vx
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.079458x
Atlanta Falcons at Carolina Panthers, 2008-09-28, american_football.football_game.receiving, m.07943ks
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers at Minnesota Vikings, 2008-09-21, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.0794h45
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.0794h56
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.passing, m.07947tn
Carolina Panthers, american_football.football_team.home_games, Washington Redskins at Carolina Panthers, 2009-10-11
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at New York Giants, 2008-12-21
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.0794803
Carolina Panthers, common.topic.article, m.01y3n
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.passing, m.07949x6
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.receiving, m.0793h43
Carolina Panthers at New York Jets, 2009-11-29, american_football.football_game.home_team, New York Jets
Carolina Panthers, american_football.football_team.current_head_coach, Ron Rivera
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.0794915
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.season, 2008 NFL season
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.07949yy
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.receiving, m.079348r
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g389_
Jerry Richardson, sports.sports_team_owner.teams_owned, Carolina Panthers
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.07949zh
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.079457x
m.0_3r22s, sports.sports_team_coach_tenure.team, Carolina Panthers
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38cc
Carolina Panthers at Atlanta Falcons, 2008-11-23, common.topic.notable_for, g.125gpgwjb
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38bp
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.receiving, m.07mlg66
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at San Diego Chargers, 2008-09-07
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.0794jy6
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.passing, m.09g38cr
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.receiving, m.07mlg3j
Carolina Panthers at Green Bay Packers, 2008-11-30, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.passing, m.07949pw
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.rushing, m.07949yd
Carolina Panthers, sports.sports_team.coaches, m.0_3r22s
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.home_team, Atlanta Falcons
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.receiving, m.07946wz
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.receiving, m.07mlg5j
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38bb
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.0794jtp
Philadelphia Eagles at Carolina Panthers, 2009-09-13, common.topic.notable_for, g.125cw4kn6
m.0422g9r, common.webpage.topic, Carolina Panthers
Atlanta Falcons at Carolina Panthers, 2008-09-28, american_football.football_game.receiving, m.07943k3
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.07947_4
Washington Redskins at Carolina Panthers, 2009-10-11, american_football.football_game.home_team, Carolina Panthers
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.079455d
Carolina Panthers, american_football.football_historical_coach_position.team, m.04xg_yl
m.04xg_yl, american_football.football_historical_coach_position.team, Carolina Panthers
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at New York Jets, 2009-11-29
Atlanta Falcons at Carolina Panthers, 2008-09-28, american_football.football_game.home_team, Carolina Panthers
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.079480k
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.receiving, m.07mlg4v
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at New Orleans Saints, 2008-12-28
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at Atlanta Falcons, 2009-09-20
Carolina Panthers at New York Jets, 2009-11-29, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at New Orleans Saints, 2009-11-08
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.079491s
Tampa Bay Buccaneers at Carolina Panthers, 2008-12-08, american_football.football_game.home_team, Carolina Panthers
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.079454s
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.0794jvn
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.07947xp
Atlanta Falcons at Carolina Panthers, 2008-09-28, american_football.football_game.receiving, m.07943mt
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.07949_1
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers, american_football.football_team.home_games, Tampa Bay Buccaneers at Carolina Panthers, 2008-12-08
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.receiving, m.07mlfy4
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.07947_m
Atlanta Falcons at Carolina Panthers, 2008-09-28, american_football.football_game.receiving, m.07943m6
Carolina Panthers, american_football.football_team.conference, National Football Conference
Atlanta Falcons at Carolina Panthers, 2008-09-28, common.topic.notable_for, g.1258qrb_4
Carolina Panthers, american_football.football_team.home_games, Chicago Bears at Carolina Panthers, 2008-09-14
Atlanta Falcons at Carolina Panthers, 2008-09-28, american_football.football_game.receiving, m.07943nr
Ron Rivera, american_football.football_coach.current_team_head_coached, Carolina Panthers
Atlanta Falcons at Carolina Panthers, 2008-09-28, american_football.football_game.passing, m.07943gs
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.receiving, m.079348b
Carolina Panthers, american_football.football_team.home_games, Atlanta Falcons at Carolina Panthers, 2008-09-28
New Orleans Saints at Carolina Panthers, 2008-10-19, american_football.football_game.home_team, Carolina Panthers
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.receiving, m.07946yr
Carolina Panthers, american_football.football_team.home_games, New Orleans Saints at Carolina Panthers, 2008-10-19
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.0794jxs
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.rushing, m.079453_
New York Giants, american_football.football_team.home_games, Carolina Panthers at New York Giants, 2008-12-21
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at Oakland Raiders, 2008-11-09
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38h8
Carolina Panthers, american_football.football_team.home_games, Tampa Bay Buccaneers at Carolina Panthers, 2009-12-06
Washington Redskins at Carolina Panthers, 2009-10-11, common.topic.notable_for, g.125dln6cx
Tampa Bay Buccaneers at Carolina Panthers, 2009-12-06, american_football.football_game.home_team, Carolina Panthers
Carolina Panthers at Tampa Bay Buccaneers, 2009-10-18, common.topic.notable_for, g.1259jc_0f
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.0794jwg
Atlanta Falcons at Carolina Panthers, 2009-11-15, common.topic.notable_for, g.1257qq8p4
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.home_team, New England Patriots
Carolina Panthers, american_football.football_team.division, NFC South
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.rushing, m.07948_d
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.home_team, New Orleans Saints
Tampa Bay Buccaneers at Carolina Panthers, 2009-12-06, common.topic.notable_for, g.12595j_by
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at Minnesota Vikings, 2008-09-21
Chicago Bears at Carolina Panthers, 2008-09-14, american_football.football_game.home_team, Carolina Panthers
Carolina Panthers, sports.professional_sports_team.owner_s, Jerry Richardson
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at Atlanta Falcons, 2008-11-23
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.rushing, m.09g38dw
Carolina Panthers at Dallas Cowboys, 2009-09-28, american_football.football_game.home_team, Dallas Cowboys
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.rushing, m.079452d
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.home_team, New York Giants
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.07947ww
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38gy
Atlanta Falcons at Carolina Panthers, 2008-09-28, american_football.football_game.receiving, m.07943lm
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.079492k
Atlanta Falcons at Carolina Panthers, 2008-09-28, american_football.football_game.receiving, m.07947jc
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at New England Patriots, 2009-12-13
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.rushing, m.07948ys
Carolina Panthers, american_football.football_team.home_games, Atlanta Falcons at Carolina Panthers, 2009-11-15
m.0j81th4, american_football.football_historical_coach_position.team, Carolina Panthers
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38gl
Philadelphia Eagles at Carolina Panthers, 2009-09-13, american_football.football_game.home_team, Carolina Panthers
Carolina Panthers at New England Patriots, 2009-12-13, common.topic.notable_for, g.125f5f2lb
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.rushing, m.079453b
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.home_team, New York Giants
Kansas City Chiefs at Carolina Panthers, 2008-10-05, american_football.football_game.home_team, Carolina Panthers
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.home_team, San Diego Chargers
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.receiving, m.07949wd
Carolina Panthers, american_football.football_team.home_games, Arizona Cardinals at Carolina Panthers, 2008-10-26
Atlanta Falcons at Carolina Panthers, 2009-11-15, american_football.football_game.home_team, Carolina Panthers
Carolina Panthers, american_football.football_team.home_games, Philadelphia Eagles at Carolina Panthers, 2009-09-13
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.receiving, m.07949v2

Answer: George Seifert