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 is the last time the pittsburgh steelers won a superbowl? 
Knowledge Triplets: Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.passing, m.0792c0t
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.season, 2008 NFL season
Pittsburgh Steelers at Cincinnati Bengals, 2008-10-19, common.topic.notable_for, g.125btxq91
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.home_team, Philadelphia Eagles
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.rushing, m.07926tg
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.receiving, m.0793q8q
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.receiving, m.0792f1r
1996 AFC Championship Game, sports.sports_championship_event.champion, Pittsburgh Steelers
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.receiving, m.0792c61
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.rushing, m.0792cxc
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, common.topic.notable_for, g.12558wqy_
Pittsburgh Steelers at Jacksonville Jaguars, 2008-10-05, american_football.football_game.receiving, m.0792mj0
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.receiving, m.0791wqh
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.receiving, m.0792b9b
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.passing, m.0792c0c
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.rushing, m.0792cxq
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.rushing, m.0793jb5
Pittsburgh Steelers at Tennessee Titans, 2008-12-21, common.topic.notable_for, g.1255xfn7h
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.rushing, m.07922r2
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.passing, m.0793j8b
Pittsburgh Steelers at Kansas City Chiefs, 2009-11-22, american_football.football_game.receiving, m.0901ryb
Pittsburgh Steelers at Chicago Bears, 2009-09-20, american_football.football_game.passing, m.07mljwd
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.rushing, m.0793q5l
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.rushing, m.0792c1l
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.receiving, m.0792d7f
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.receiving, m.0793jhk
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.rushing, m.0791wjp
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.receiving, m.0794td2
Pittsburgh Steelers at Jacksonville Jaguars, 2008-10-05, american_football.football_game.passing, m.0792mcn
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.rushing, m.0793jc3
Pittsburgh Steelers at Tennessee Titans, 2008-12-21, american_football.football_game.receiving, m.0792t19
Pittsburgh Steelers at Tennessee Titans, 2008-12-21, american_football.football_game.receiving, m.0792db5
Pittsburgh Steelers at New England Patriots, 2008-11-30, common.topic.notable_types, NFL Game
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.rushing, m.07922nh
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.receiving, m.07922rf
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.receiving, m.0792b16
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.receiving, m.07926_4
Pittsburgh Steelers at Jacksonville Jaguars, 2008-10-05, american_football.football_game.receiving, m.0792bnc
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.receiving, m.0794tf1
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.rushing, m.0792d50
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.receiving, m.0791wkr
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.rushing, m.0794t8t
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.home_team, Cleveland Browns
Pittsburgh Steelers at Jacksonville Jaguars, 2008-10-05, american_football.football_game.receiving, m.0792bm_
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.rushing, m.0792c17
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.passing, m.0792cwl
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.receiving, m.0793q6x
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.rushing, m.0793jcy
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.receiving, m.0792f2f
Pittsburgh Steelers at Tennessee Titans, 2008-12-21, american_football.football_game.receiving, m.0792dc6
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.passing, m.0792b30
Pittsburgh Steelers at Tennessee Titans, 2008-12-21, american_football.football_game.receiving, m.0792dbj
Pittsburgh Steelers at Jacksonville Jaguars, 2008-10-05, american_football.football_game.receiving, m.0792bnz
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.receiving, m.0792d83
Pittsburgh Steelers at Kansas City Chiefs, 2009-11-22, american_football.football_game.receiving, m.0901rvd
Pittsburgh Steelers at Kansas City Chiefs, 2009-11-22, american_football.football_game.receiving, m.0901rsm
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.receiving, m.0792705
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.receiving, m.0792d72
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.rushing, m.0792cx0
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.receiving, m.0791wmj
Pittsburgh Steelers at Tennessee Titans, 2008-12-21, american_football.football_game.season, 2008 NFL season
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.season, 2008 NFL season
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.passing, m.0792d47
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.receiving, m.0794tb2
Pittsburgh Steelers, sports.sports_championship_event.champion, Super Bowl XLIII
Pittsburgh Steelers at Tennessee Titans, 2008-12-21, american_football.football_game.receiving, m.0792t2h
Pittsburgh Steelers at Kansas City Chiefs, 2009-11-22, american_football.football_game.receiving, m.0901r3d
Pittsburgh Steelers at Tennessee Titans, 2008-12-21, american_football.football_game.passing, m.0792d8q
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.away_team, Pittsburgh Steelers
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.receiving, m.0794tc0
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.receiving, m.0793jh1
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.receiving, m.0792d6r
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, common.topic.notable_types, NFL Game
Pittsburgh Steelers at Jacksonville Jaguars, 2008-10-05, american_football.football_game.receiving, m.0792mfr
1998 AFC Championship Game, sports.sports_championship_event.runner_up, Pittsburgh Steelers
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.rushing, m.0792cy1
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.rushing, m.0793j9k
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.passing, m.0794t6r
Pittsburgh Steelers at Jacksonville Jaguars, 2008-10-05, common.topic.notable_for, g.125h3jddn
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.rushing, m.0792b0v
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.away_team, Pittsburgh Steelers
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.season, 2008 NFL season
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.receiving, m.0792b1z
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.rushing, m.0792b0h
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.receiving, m.07926zd
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.receiving, m.0793jgj
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.receiving, m.0791wp5
Pittsburgh Steelers at Kansas City Chiefs, 2009-11-22, american_football.football_game.receiving, m.0901rrb
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.rushing, m.07926qy
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, common.topic.notable_types, NFL Game
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.receiving, m.0793q64
Pittsburgh Steelers at Tennessee Titans, 2008-12-21, american_football.football_game.receiving, m.0792dcx
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.receiving, m.0792c3v
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.receiving, m.0792c6m
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.receiving, m.07922sk
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.rushing, m.07922qn
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.receiving, m.0792d6d
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.receiving, m.07926ym
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, common.topic.notable_for, g.1256knc1q
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.receiving, m.0793jdk
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.receiving, m.0792b76
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.rushing, m.07922ps
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.rushing, m.0792c28
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.rushing, m.0792b5r
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.rushing, m.07926v8
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.passing, m.07926mr
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.rushing, m.0792d61
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.rushing, m.0793jbn
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.receiving, m.0792c5c
Pittsburgh Steelers at Jacksonville Jaguars, 2008-10-05, american_football.football_game.receiving, m.0792mkk
Pittsburgh Steelers at New England Patriots, 2008-11-30, common.topic.notable_for, g.125g473dj
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.receiving, m.0793jfz
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.receiving, m.0793q80
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.receiving, m.0793jfg
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.passing, m.0791whx
Pittsburgh Steelers at Kansas City Chiefs, 2009-11-22, american_football.football_game.passing, m.0901rdg
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.rushing, m.0792c31
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.receiving, m.0794tbh
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.receiving, m.0792b1l
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.receiving, m.0793qb5
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.receiving, m.0792c4n
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.receiving, m.0792b6f
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.receiving, m.0792b8n
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.receiving, m.0792f1d
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.receiving, m.0792719
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.receiving, m.0792c_3
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.receiving, m.0791wlk
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.receiving, m.0792czf
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.season, 2008 NFL season
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.receiving, m.0794tg6
Pittsburgh Steelers at Jacksonville Jaguars, 2008-10-05, american_football.football_game.season, 2008 NFL season
Pittsburgh Steelers at Washington Redskins, 2008-11-03, common.topic.notable_types, NFL Game
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.passing, m.07922mc
1995 AFC Championship Game, sports.sports_championship_event.runner_up, Pittsburgh Steelers
Pittsburgh Steelers at Tennessee Titans, 2008-12-21, american_football.football_game.receiving, m.0792dck
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.receiving, m.0792cz2
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.receiving, m.0792cyr
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.rushing, m.0792b3j
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.passing, m.07929_b
Pittsburgh Steelers at Chicago Bears, 2009-09-20, american_football.football_game.passing, m.07mlk3t
Pittsburgh Steelers, sports.sports_team.championships, 1996 AFC Championship Game
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.season, 2008 NFL season
Pittsburgh Steelers at Denver Broncos, 2009-11-09, common.topic.notable_for, g.12561994g
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.receiving, m.07926x7
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.rushing, m.0791wk0
Pittsburgh Steelers, sports.sports_team.championships, 2006 AFC Championship Game
Pittsburgh Steelers at Kansas City Chiefs, 2009-11-22, american_football.football_game.season, 2009 NFL season
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.receiving, m.0792f11
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.passing, m.0792b2l
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.receiving, m.07922t3
Pittsburgh Steelers at Kansas City Chiefs, 2009-11-22, american_football.football_game.passing, m.0901rct
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.rushing, m.07926p8
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.receiving, m.0792f22
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, common.topic.notable_for, g.125h5bpg8
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.rushing, m.0792b4v
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.receiving, m.0794tgx
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.receiving, m.0791wqx
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.rushing, m.0792c1y
Pittsburgh Steelers at Kansas City Chiefs, 2009-11-22, american_football.football_game.receiving, m.0901rtv
Pittsburgh Steelers at Jacksonville Jaguars, 2008-10-05, american_football.football_game.passing, m.0792bks
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.receiving, m.0793q9b
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.receiving, m.0794tj1
Pittsburgh Steelers at Denver Broncos, 2009-11-09, american_football.football_game.passing, m.088x37t
Pittsburgh Steelers at Kansas City Chiefs, 2009-11-22, american_football.football_game.passing, m.0901qyg
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.rushing, m.07929_s
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.rushing, m.0792d5c
Pittsburgh Steelers at Kansas City Chiefs, 2009-11-22, american_football.football_game.receiving, m.0901rc3
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.rushing, m.0791wjb
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.passing, m.0793j8z
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.rushing, m.0792d5q
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.receiving, m.07922rt
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.receiving, m.0792czs
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.receiving, m.0792cyd
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.receiving, m.0793jdz
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.receiving, m.0791wl2
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.receiving, m.07926wf
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.season, 2008 NFL season
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.passing, m.0792dz6
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.rushing, m.0793q46
Pittsburgh Steelers at Tennessee Titans, 2008-12-21, american_football.football_game.passing, m.0792t03
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.passing, m.0793q3j
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.rushing, m.0792c2p
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.rushing, m.0791wkd
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.rushing, m.07926rt
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.rushing, m.0792d4p
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.receiving, m.0792f00
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.receiving, m.0792d7s
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.rushing, m.0792b3y
Pittsburgh Steelers at Baltimore Ravens, 2008-12-14, american_football.football_game.receiving, m.07922s5
Pittsburgh Steelers at Cleveland Browns, 2008-09-14, american_football.football_game.rushing, m.0792b04
Pittsburgh Steelers at Washington Redskins, 2008-11-03, american_football.football_game.rushing, m.0793q4s
Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21, american_football.football_game.receiving, m.0792b7z
Pittsburgh Steelers at Washington Redskins, 2008-11-03, common.topic.notable_for, g.1259m4sn3

Answer: Super Bowl XLIII