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: The 2009 AFC Championship winners are from which state? 
Knowledge Triplets: Baltimore Ravens at Cincinnati Bengals, 2009-11-08, american_football.football_game.away_team, Baltimore Ravens
Baltimore Ravens, sports.sports_team.championships, 2013 AFC Championship Game
1981 AFC Championship Game, common.topic.notable_types, Event
2009 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
1975 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
1990 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 2011 AFC Championship Game
Pittsburgh Steelers at Chicago Bears, 2009-09-20, american_football.football_game.away_team, Pittsburgh Steelers
Three Rivers Stadium, location.location.events, 1995 AFC Championship Game
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at New England Patriots, 2009-10-04
AFC Championship Game, sports.sports_championship.events, 2014 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1974 AFC Championship Game
AFC North, sports.sports_league.teams, m.0crtf9f
Baltimore Ravens, american_football.football_team.home_games, Pittsburgh Steelers at Baltimore Ravens, 2009-11-29
1971 AFC Championship Game, common.topic.notable_types, Event
Denver Broncos at Baltimore Ravens, 2009-11-01, american_football.football_game.home_team, Baltimore Ravens
AFC Championship Game, sports.sports_championship.events, 1991 AFC Championship Game
Pittsburgh Steelers, american_football.football_team.home_games, Tennessee Titans at Pittsburgh Steelers, 2009-09-10
1984 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 1994 AFC Championship Game
2011 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
2011 AFC Championship Game, sports.sports_championship_event.champion, Pittsburgh Steelers
American Football Conference, sports.sports_league.championship, AFC Championship Game
Pittsburgh Steelers at Cleveland Browns, 2009-12-10, american_football.football_game.away_team, Pittsburgh Steelers
Baltimore Ravens, american_football.football_team.home_games, Cleveland Browns at Baltimore Ravens, 2009-09-27
Pittsburgh Steelers at Baltimore Ravens, 2009-11-29, american_football.football_game.home_team, Baltimore Ravens
2009 AFC Championship Game, sports.sports_team.championships, Pittsburgh Steelers
Pittsburgh Steelers, american_football.football_team.home_games, San Diego Chargers at Pittsburgh Steelers, 2009-01-11
2001 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
2002 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1990 AFC Championship Game
1999 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
2008 NFL season, sports.sports_league_season.championship, 2009 NFC Championship Game
2008 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
1979 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
1980 AFC Championship Game, common.topic.notable_types, Event
Baltimore Ravens, american_football.football_team.home_games, Indianapolis Colts at Baltimore Ravens, 2009-11-22
AFC Championship Game, common.topic.article, m.04_607
Pittsburgh Steelers, american_football.football_team.home_games, Cincinnati Bengals at Pittsburgh Steelers, 2009-11-15
2010 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
Pittsburgh Steelers, sports.sports_team_location.teams, Pittsburgh
Pittsburgh Steelers, american_football.football_team.home_games, Baltimore Ravens at Pittsburgh Steelers, 2009-12-27
Pittsburgh Steelers at Baltimore Ravens, 2009-11-29, american_football.football_game.away_team, Pittsburgh Steelers
2013 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
1998 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Pittsburgh Steelers at Kansas City Chiefs, 2009-11-22, american_football.football_game.away_team, Pittsburgh Steelers
2009 AFC Championship Game, sports.sports_championship_event.champion, Pittsburgh Steelers
New York Giants at Pittsburgh Steelers, 2008-10-26, american_football.football_game.season, 2008 NFL season
2000 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
Baltimore Ravens at Tennessee Titans, 2009-01-10, american_football.football_game.away_team, Baltimore Ravens
2003 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
1977 AFC Championship Game, common.topic.notable_types, Event
AFC Championship Game, time.recurring_event.instances, 1986 AFC Championship Game
Heinz Field, location.location.containedby, Pittsburgh
1983 AFC Championship Game, common.topic.notable_types, Event
Baltimore Ravens, american_football.football_team.home_games, Cincinnati Bengals at Baltimore Ravens, 2009-10-11
Baltimore Ravens at New England Patriots, 2009-10-04, american_football.football_game.away_team, Baltimore Ravens
AFC Championship Game, sports.sports_championship.events, 2010 AFC Championship Game
1976 AFC Championship Game, common.topic.notable_types, Event
Baltimore Ravens at Pittsburgh Steelers, 2009-01-18, american_football.football_game.away_team, Baltimore Ravens
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.season, 2008 NFL season
AFC Championship Game, sports.sports_championship.events, 1990 AFC Championship Game
Pittsburgh Steelers, sports.sports_team.championships, 1996 AFC Championship Game
1982 AFC Championship Game, common.topic.notable_types, Event
1982 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
AFC North, american_football.football_division.teams, Baltimore Ravens
1987 AFC Championship Game, common.topic.notable_types, Event
Heinz Field, location.location.events, 2009 AFC Championship Game
1974 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Cleveland Browns at Pittsburgh Steelers, 2009-10-18, american_football.football_game.home_team, Pittsburgh Steelers
AFC Championship Game, time.recurring_event.instances, 2003 AFC Championship Game
2012 AFC Championship Game, sports.sports_championship_event.runner_up, Baltimore Ravens
AFC Championship Game, time.recurring_event.instances, 1998 AFC Championship Game
Green Bay Packers at Pittsburgh Steelers, 2009-12-20, american_football.football_game.home_team, Pittsburgh Steelers
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at Minnesota Vikings, 2009-10-18
2009 AFC Championship Game, sports.sports_championship_event.season, 2008 NFL season
2006 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
2011 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Minnesota Vikings at Pittsburgh Steelers, 2009-10-25, american_football.football_game.home_team, Pittsburgh Steelers
1991 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
Pittsburgh Steelers, sports.sports_team.championships, 2006 AFC Championship Game
1993 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1991 AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 2002 AFC Championship Game
1973 AFC Championship Game, common.topic.notable_types, Event
1990 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
1985 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Pittsburgh Steelers, american_football.football_team.away_games, Pittsburgh Steelers at Baltimore Ravens, 2009-11-29
AFC Championship Game, common.topic.notable_types, Sports League Championship
m.09w9wmb, common.webpage.topic, AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1989 AFC Championship Game
1981 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Baltimore Ravens, american_football.football_team.home_games, Tennessee Titans at Baltimore Ravens, 2008-10-05
Baltimore Ravens, american_football.football_team.home_games, Kansas City Chiefs at Baltimore Ravens, 2009-09-13
2005 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Heinz Field, location.location.events, 2011 AFC Championship Game
San Diego Chargers at Pittsburgh Steelers, 2008-11-16, american_football.football_game.season, 2008 NFL season
m.09x761_, common.webpage.topic, AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1999 AFC Championship Game
2011 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
AFC Championship Game, freebase.valuenotation.is_reviewed, Current frequency
1999 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 2005 AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 2005 AFC Championship Game
Pittsburgh Steelers at Denver Broncos, 2009-11-09, american_football.football_game.away_team, Pittsburgh Steelers
2006 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
AFC Championship Game, time.recurring_event.instances, 2002 AFC Championship Game
1998 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
Three Rivers Stadium, location.location.events, 1996 AFC Championship Game
2005 AFC Championship Game, time.event.locations, Heinz Field
2004 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
1976 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
2008 NFL season, sports.sports_league_season.championship, 2009 AFC Championship Game
Three Rivers Stadium, location.location.events, 1973 AFC Championship Game
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at San Diego Chargers, 2009-09-20
2013 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Pittsburgh Steelers, american_football.football_team.away_games, Pittsburgh Steelers at Denver Broncos, 2009-11-09
San Diego Chargers at Pittsburgh Steelers, 2009-01-11, american_football.football_game.season, 2008 NFL season
Pittsburgh Steelers, sports.sports_team.championships, 2011 AFC Championship Game
Baltimore Ravens at Miami Dolphins, 2009-01-04, american_football.football_game.away_team, Baltimore Ravens
Detroit Lions at Baltimore Ravens, 2009-12-13, american_football.football_game.home_team, Baltimore Ravens
1995 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
1979 AFC Championship Game, common.topic.notable_types, Event
1980 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
1989 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
1988 AFC Championship Game, common.topic.notable_types, Event
2009 NFC Championship Game, sports.sports_championship_event.season, 2008 NFL season
AFC Championship Game, time.recurring_event.instances, 2008 AFC Championship Game
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.home_team, Pittsburgh Steelers
Pittsburgh Steelers, american_football.football_team.home_games, Green Bay Packers at Pittsburgh Steelers, 2009-12-20
1983 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Three Rivers Stadium, location.location.events, 1976 AFC Championship Game
Baltimore Ravens at Cleveland Browns, 2009-11-16, american_football.football_game.away_team, Baltimore Ravens
Cleveland Browns at Baltimore Ravens, 2009-09-27, american_football.football_game.home_team, Baltimore Ravens
2010 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
2009 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Baltimore Ravens at Pittsburgh Steelers, 2009-12-27, american_football.football_game.home_team, Pittsburgh Steelers
1992 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
1975 AFC Championship Game, common.topic.notable_types, Event
AFC North, american_football.football_division.teams, Pittsburgh Steelers
AFC Championship Game, common.topic.webpage, m.09x761_
AFC Championship Game, time.recurring_event.instances, 1993 AFC Championship Game
San Diego Chargers at Pittsburgh Steelers, 2009-01-11, american_football.football_game.home_team, Pittsburgh Steelers
AFC Championship Game, time.recurring_event.instances, 2001 AFC Championship Game
2014 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1992 AFC Championship Game
2001 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
2001 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Chicago Bears at Baltimore Ravens, 2009-12-20, american_football.football_game.home_team, Baltimore Ravens
Pittsburgh Steelers, american_football.football_team.home_games, Baltimore Ravens at Pittsburgh Steelers, 2009-01-18
2004 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
Three Rivers Stadium, location.location.events, 1979 AFC Championship Game
Pittsburgh Steelers at Cincinnati Bengals, 2009-09-27, american_football.football_game.away_team, Pittsburgh Steelers
AFC Championship Game, time.recurring_event.instances, 2011 AFC Championship Game
Heinz Field, location.location.events, 2002 AFC Championship Game
1998 AFC Championship Game, sports.sports_championship_event.runner_up, Pittsburgh Steelers
AFC Championship Game, sports.sports_championship.events, 2000 AFC Championship Game
1999 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1997 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1996 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 2007 AFC Championship Game
2008 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
Pittsburgh Steelers at New England Patriots, 2008-11-30, american_football.football_game.season, 2008 NFL season
Oakland Raiders at Pittsburgh Steelers, 2009-12-06, american_football.football_game.home_team, Pittsburgh Steelers
1976 AFC Championship Game, time.event.locations, Three Rivers Stadium
1991 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
1997 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
Three Rivers Stadium, location.location.events, 1998 AFC Championship Game
1993 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
1973 AFC Championship Game, time.event.locations, Three Rivers Stadium
Baltimore Ravens at Miami Dolphins, 2009-01-04, american_football.football_game.season, 2008 NFL season
AFC North, sports.sports_league.teams, m.0crtf92
1997 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
Pittsburgh Steelers, american_football.football_team.home_games, Minnesota Vikings at Pittsburgh Steelers, 2009-10-25
2002 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
2003 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
1986 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
1973 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Heinz Field, location.location.events, 2005 AFC Championship Game
1993 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
1996 AFC Championship Game, time.event.locations, Three Rivers Stadium
AFC North, american_football.football_division.conference, American Football Conference
AFC Championship Game, time.recurring_event.instances, 1988 AFC Championship Game
2005 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
2005 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
AFC Championship Game, sports.sports_championship.events, 2013 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1981 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1973 AFC Championship Game
Pittsburgh Steelers, american_football.football_team.away_games, Pittsburgh Steelers at Cleveland Browns, 2009-12-10
2009 AFC Championship Game, sports.sports_championship_event.runner_up, Baltimore Ravens
1987 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
2000 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 2007 AFC Championship Game
Baltimore Ravens at Tennessee Titans, 2009-01-10, american_football.football_game.season, 2008 NFL season
AFC Championship Game, sports.sports_championship.events, 1997 AFC Championship Game
Cincinnati Bengals at Pittsburgh Steelers, 2009-11-15, american_football.football_game.home_team, Pittsburgh Steelers
1996 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
2007 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
AFC Championship Game, time.recurring_event.instances, 1980 AFC Championship Game
2006 AFC Championship Game, sports.sports_championship_event.champion, Pittsburgh Steelers
AFC Championship Game, time.recurring_event.instances, 1979 AFC Championship Game
1995 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Three Rivers Stadium, location.location.events, 1980 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1976 AFC Championship Game
2012 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
2003 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
2012 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at Pittsburgh Steelers, 2009-12-27
Cincinnati Bengals at Baltimore Ravens, 2009-10-11, american_football.football_game.home_team, Baltimore Ravens
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at Tennessee Titans, 2009-01-10
AFC Championship Game, time.recurring_event.instances, 1987 AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 2012 AFC Championship Game
2004 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Pittsburgh Steelers at Tennessee Titans, 2008-12-21, american_football.football_game.season, 2008 NFL season
2002 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
Pittsburgh Steelers, american_football.football_team.home_games, Cleveland Browns at Pittsburgh Steelers, 2009-10-18
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at Cleveland Browns, 2009-11-16
AFC Championship Game, sports.sports_championship.events, 1998 AFC Championship Game
1986 AFC Championship Game, common.topic.notable_types, Event
AFC Championship Game, sports.sports_championship.events, 1999 AFC Championship Game
AFC Championship Game, sports.sports_championship.league, American Football Conference
2009 AFC Championship Game, time.event.locations, Heinz Field
AFC Championship Game, common.topic.webpage, m.09w9wmb
1972 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
2014 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
1977 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
NFL: Run for the Championship: The 2008 NFL Season in Review, film.film.subjects, 2008 NFL season
1985 AFC Championship Game, common.topic.notable_types, Event
Baltimore Ravens at Minnesota Vikings, 2009-10-18, american_football.football_game.away_team, Baltimore Ravens
AFC Championship Game, sports.sports_championship.events, 1993 AFC Championship Game
1996 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
1995 AFC Championship Game, time.event.locations, Three Rivers Stadium
Baltimore Ravens at Pittsburgh Steelers, 2009-01-18, american_football.football_game.season, 2008 NFL season
1998 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
1995 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
AFC Championship Game, time.recurring_event.instances, 2009 AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 1996 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 2013 AFC Championship Game
Pittsburgh Steelers, american_football.football_team.away_games, Pittsburgh Steelers at Chicago Bears, 2009-09-20
AFC Championship Game, sports.sports_championship.events, 2004 AFC Championship Game
1989 AFC Championship Game, common.topic.notable_types, Event
1988 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at Cincinnati Bengals, 2009-11-08
1974 AFC Championship Game, common.topic.notable_types, Event
AFC Championship Game, time.recurring_event.current_frequency, Yearly
AFC Championship Game, time.recurring_event.instances, 1984 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1972 AFC Championship Game
2013 AFC Championship Game, sports.sports_championship_event.champion, Baltimore Ravens
1994 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
Pittsburgh Steelers, american_football.football_team.away_games, Pittsburgh Steelers at Cincinnati Bengals, 2009-09-27
1971 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Baltimore Ravens at Pittsburgh Steelers, 2009-01-18, american_football.football_game.home_team, Pittsburgh Steelers
AFC Championship Game, time.recurring_event.instances, 2004 AFC Championship Game
2009 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1982 AFC Championship Game
AFC Championship Game, freebase.valuenotation.has_no_value, Date of final occurrence
2001 AFC Championship Game, sports.sports_championship_event.champion, Baltimore Ravens
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.season, 2008 NFL season
AFC Championship Game, time.recurring_event.instances, 1983 AFC Championship Game
1978 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 2014 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 2012 AFC Championship Game
2002 AFC Championship Game, time.event.locations, Heinz Field
AFC Championship Game, sports.sports_championship.events, 2006 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1977 AFC Championship Game
1992 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
Pittsburgh Steelers, sports.sports_team.championships, 2009 AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 2008 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1985 AFC Championship Game
Pittsburgh Steelers, american_football.football_team.away_games, Pittsburgh Steelers at Arizona Cardinals, 2009-02-01
1978 AFC Championship Game, common.topic.notable_types, Event
1992 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
2009 AFC Championship Game, common.topic.notable_for, g.1z2st10mn
2007 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
2005 AFC Championship Game, sports.sports_championship_event.runner_up, Pittsburgh Steelers
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.away_team, Baltimore Ravens
Pittsburgh Steelers, american_football.football_team.home_games, Oakland Raiders at Pittsburgh Steelers, 2009-12-06
AFC Championship Game, time.recurring_event.instances, 2010 AFC Championship Game
Baltimore Ravens, sports.sports_team.championships, 2001 AFC Championship Game
1990 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
1994 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
AFC Championship Game, common.topic.notable_for, g.125f3f37n
2009 AFC Championship Game, location.location.events, Heinz Field
AFC Championship Game, sports.sports_championship.events, 2001 AFC Championship Game
Pittsburgh Steelers, american_football.football_team.away_games, Pittsburgh Steelers at Kansas City Chiefs, 2009-11-22
AFC Championship Game, time.recurring_event.instances, 1975 AFC Championship Game
2000 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
2009 NFC Championship Game, common.topic.notable_types, Sports League Championship Event
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at Pittsburgh Steelers, 2009-01-18
1997 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1995 AFC Championship Game
AFC North, sports.sports_league.sport, American football
San Diego Chargers at Pittsburgh Steelers, 2009-10-04, american_football.football_game.home_team, Pittsburgh Steelers
2008 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Pittsburgh Steelers at Detroit Lions, 2009-10-11, american_football.football_game.away_team, Pittsburgh Steelers
1980 AFC Championship Game, time.event.locations, Three Rivers Stadium
AFC Championship Game, sports.sports_championship.events, 2009 AFC Championship Game
1998 AFC Championship Game, time.event.locations, Three Rivers Stadium
1994 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.away_team, Pittsburgh Steelers
2013 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
Baltimore Ravens at Pittsburgh Steelers, 2009-12-27, american_football.football_game.away_team, Baltimore Ravens
AFC Championship Game, time.recurring_event.instances, 1971 AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 2003 AFC Championship Game
Indianapolis Colts at Baltimore Ravens, 2009-11-22, american_football.football_game.home_team, Baltimore Ravens
1995 AFC Championship Game, sports.sports_championship_event.runner_up, Pittsburgh Steelers
1984 AFC Championship Game, common.topic.notable_types, Event
AFC Championship Game, time.recurring_event.instances, 1978 AFC Championship Game
2012 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
1979 AFC Championship Game, time.event.locations, Three Rivers Stadium
Pittsburgh Steelers, american_football.football_team.home_games, San Diego Chargers at Pittsburgh Steelers, 2009-10-04
2014 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.away_team, Baltimore Ravens
2011 AFC Championship Game, time.event.locations, Heinz Field
2007 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 2006 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1994 AFC Championship Game
2002 AFC Championship Game, sports.sports_championship_event.runner_up, Pittsburgh Steelers
1996 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 1995 AFC Championship Game
2006 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
1991 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
2010 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
Kansas City Chiefs at Baltimore Ravens, 2009-09-13, american_football.football_game.home_team, Baltimore Ravens
1972 AFC Championship Game, common.topic.notable_types, Event
1996 AFC Championship Game, sports.sports_championship_event.champion, Pittsburgh Steelers
AFC Championship Game, time.recurring_event.instances, 2000 AFC Championship Game
Pittsburgh Steelers, american_football.football_team.away_games, Pittsburgh Steelers at Detroit Lions, 2009-10-11
AFC Championship Game, sports.sports_championship.events, 1992 AFC Championship Game

Answer: Pittsburgh