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: when did carolina panthers go to superbowl? 
Knowledge Triplets: Carolina Panthers at San Diego Chargers, 2008-09-07, common.topic.notable_for, g.1255_s4h7
Carolina Panthers at Oakland Raiders, 2008-11-09, common.topic.notable_types, NFL Game
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.home_team, New Orleans Saints
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.passing, m.09g3885
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g389_
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.07948_x
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.0794h34
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.rushing, m.0794jsl
Carolina Panthers at Oakland Raiders, 2008-11-09, american_football.football_game.passing, m.07932ly
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.rushing, m.09g3899
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.passing, m.09g38cr
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.079458k
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.receiving, m.09knfb2
Carolina Panthers at New York Giants, 2009-12-27, common.topic.notable_for, g.125fbm304
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.season, 2009 NFL season
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.0794h0q
Carolina Panthers at New York Jets, 2009-11-29, common.topic.notable_for, g.1259mfyt6
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.0794h4m
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38gl
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, common.topic.notable_for, g.125fg890p
Carolina Panthers at New Orleans Saints, 2008-12-28, common.topic.notable_types, NFL Game
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.passing, m.0793gzh
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.season, 2008 NFL season
Carolina Panthers, tv.tv_actor.guest_roles, m.0ggrntb
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.079491s
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, common.topic.notable_types, NFL Game
Carolina Panthers at Minnesota Vikings, 2008-09-21, american_football.football_game.season, 2008 NFL season
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.receiving, m.07946yr
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.rushing, m.07946v8
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.receiving, m.07949sz
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.receiving, m.09knfbs
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.receiving, m.09knfbf
Carolina Panthers at Oakland Raiders, 2008-11-09, american_football.football_game.rushing, m.07932mz
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.passing, m.079451x
Carolina Panthers at Oakland Raiders, 2008-11-09, american_football.football_game.passing, m.07932kn
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.season, 2009 NFL season
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.0794h2d
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.rushing, m.09g38f6
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38fx
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.079490b
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.receiving, m.07949v2
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.passing, m.0794gy8
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.079492k
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38c0
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38bb
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.receiving, m.0793h4j
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.rushing, m.0793h07
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.07949zh
Carolina Panthers at Oakland Raiders, 2008-11-09, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.07949yy
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38gy
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.rushing, m.0794g_l
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 at San Diego Chargers, 2008-09-07, american_football.football_game.receiving, m.0793455
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at San Diego Chargers, 2008-09-07
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.receiving, m.0793h1r
Carolina Panthers at Dallas Cowboys, 2009-09-28, common.topic.notable_for, g.125crtfpw
Carolina Panthers at Oakland Raiders, 2008-11-09, american_football.football_game.rushing, m.07932nd
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.0794915
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.receiving, m.09knf8q
Carolina Panthers at Atlanta Falcons, 2008-11-23, common.topic.notable_for, g.125gpgwjb
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.rushing, m.079453b
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.rushing, m.09g388m
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.receiving, m.0793h2x
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.07947_4
m.0ggrntb, tv.tv_guest_role.episodes_appeared_in, Super Bowl XXXVIII
Carolina Panthers at New England Patriots, 2009-12-13, common.topic.notable_types, NFL Game
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38cc
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers at Oakland Raiders, 2008-11-09, american_football.football_game.receiving, m.07932rc
Carolina Panthers at New Orleans Saints, 2009-11-08, american_football.football_game.season, 2009 NFL season
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.receiving, m.07946xs
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.receiving, m.07946zb
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.passing, m.09knf30
Carolina Panthers at Green Bay Packers, 2008-11-30, common.topic.notable_for, g.125925w1w
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.receiving, m.07946wz
Carolina Panthers at Oakland Raiders, 2008-11-09, common.topic.notable_for, g.12552ym28
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38bp
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38hz
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.rushing, m.09g38dw
Carolina Panthers at Atlanta Falcons, 2008-11-23, common.topic.notable_types, NFL Game
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.079454s
Carolina Panthers at Arizona Cardinals, 2009-11-01, american_football.football_game.home_team, Arizona Cardinals
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.receiving, m.07946xc
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.receiving, m.09knf91
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.home_team, New York Giants
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.rushing, m.09g388z
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.rushing, m.0793432
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.0794jtp
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at New York Giants, 2008-12-21
2004 NFC Championship Game, sports.sports_championship_event.champion, Carolina Panthers
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.receiving, m.0793h43
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.0794560
Carolina Panthers, american_football.football_team.away_games, Carolina Panthers at New Orleans Saints, 2008-12-28
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.season, 2008 NFL season
Carolina Panthers at Dallas Cowboys, 2009-09-28, american_football.football_game.season, 2009 NFL season
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.rushing, m.0793g_m
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.rushing, m.07948ys
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.passing, m.07949x6
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.receiving, m.07946v_
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.receiving, m.079458x
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.079455d
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.rushing, m.0793h0y
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.receiving, m.07949rz
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.home_team, New England Patriots
Carolina Panthers at Green Bay Packers, 2008-11-30, american_football.football_game.season, 2008 NFL season
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.receiving, m.079348b
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.rushing, m.07946th
Carolina Panthers at Oakland Raiders, 2008-11-09, american_football.football_game.home_team, Oakland Raiders
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.home_team, New York Giants
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.receiving, m.079348r
Carolina Panthers at Arizona Cardinals, 2009-11-01, common.topic.notable_types, NFL Game
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.receiving, m.09knf9d
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.receiving, m.079347v
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.receiving, m.079345r
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.0794h3n
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.receiving, m.09knf55
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.rushing, m.09g389n
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.079456x
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.0794925
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.passing, m.07948xb
Carolina Panthers at Oakland Raiders, 2008-11-09, american_football.football_game.receiving, m.07932rv
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.receiving, m.0793h3r
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.season, 2008 NFL season
Carolina Panthers at Arizona Cardinals, 2009-11-01, american_football.football_game.season, 2009 NFL season
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.07949_1
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.receiving, m.079457x
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.07947_m
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.rushing, m.0794gzw
Carolina Panthers, sports.sports_team.championships, 2004 NFC Championship Game
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.rushing, m.0793g_0
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.receiving, m.079346z
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.passing, m.07947tn
Carolina Panthers at Oakland Raiders, 2008-11-09, american_football.football_game.receiving, m.07932qm
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.receiving, m.09knf5w
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.rushing, m.07949qr
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.rushing, m.07949rc
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.rushing, m.079453_
Carolina Panthers at Atlanta Falcons, 2009-09-20, american_football.football_game.season, 2009 NFL season
Carolina Panthers at New York Giants, 2008-12-21, common.topic.notable_types, NFL Game
Carolina Panthers at San Diego Chargers, 2008-09-07, common.topic.notable_types, NFL Game
Carolina Panthers at New York Giants, 2009-12-27, common.topic.notable_types, NFL Game
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.0794h56
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.home_team, San Diego Chargers
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.receiving, m.09knf4h
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.rushing, m.09g38dj
Carolina Panthers at Oakland Raiders, 2008-11-09, american_football.football_game.season, 2008 NFL season
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.passing, m.09knf6x
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.rushing, m.07949x_
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38hm
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.rushing, m.079452d
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.rushing, m.079342k
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.rushing, m.09g38fk
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.receiving, m.07949wd
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.rushing, m.079343w
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.receiving, m.09knf5j
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.home_team, Atlanta Falcons
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.receiving, m.09knf9r
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.season, 2008 NFL season
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.rushing, m.079452y
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.rushing, m.07946sm
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.receiving, m.0793h2b
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.rushing, m.09knf80
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38g7
Carolina Panthers at New York Jets, 2009-11-29, american_football.football_game.season, 2009 NFL season
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.season, 2008 NFL season
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.07947z7
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.receiving, m.07946y5
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.receiving, m.09knf4v
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.receiving, m.0793h3b
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.passing, m.0793421
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.receiving, m.09g38h8
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.rushing, m.09g38d5
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.receiving, m.0794jwg
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.passing, m.07946rs
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.passing, m.0794jmf
Carolina Panthers at Atlanta Falcons, 2009-09-20, common.topic.notable_for, g.125cnxp6m
Carolina Panthers at New Orleans Saints, 2008-12-28, common.topic.notable_for, g.125bq2bh0
Carolina Panthers at Arizona Cardinals, 2009-11-01, common.topic.notable_for, g.125fxmlly
Carolina Panthers at New England Patriots, 2009-12-13, american_football.football_game.away_team, Carolina Panthers
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.rushing, m.07948_d
Carolina Panthers at New York Giants, 2009-12-27, american_football.football_game.receiving, m.09knf66
Carolina Panthers at New York Giants, 2008-12-21, american_football.football_game.rushing, m.07949qb
Carolina Panthers at Atlanta Falcons, 2008-11-23, american_football.football_game.rushing, m.07948zg
Carolina Panthers at New York Giants, 2008-12-21, common.topic.notable_for, g.1258b__jn
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.0794h45
Carolina Panthers at Oakland Raiders, 2008-11-09, american_football.football_game.receiving, m.07932q_
Carolina Panthers at San Diego Chargers, 2008-09-07, american_football.football_game.rushing, m.079343g
Carolina Panthers at New Orleans Saints, 2008-12-28, american_football.football_game.receiving, m.0794h1c
Carolina Panthers at Oakland Raiders, 2008-11-09, american_football.football_game.rushing, m.07932nt
Carolina Panthers at Tampa Bay Buccaneers, 2008-10-12, american_football.football_game.home_team, Tampa Bay Buccaneers

Answer: Super Bowl XXXVIII