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: Which man coached the football team that emerged victorious in the 2009 AFC Championship Game? 
Knowledge Triplets: AFC Championship Game, time.recurring_event.instances, 1971 AFC Championship Game
2009 AFC Championship Game, sports.sports_championship_event.season, 2008 NFL season
AFC Championship Game, time.recurring_event.instances, 2014 AFC Championship Game
Pittsburgh Steelers, sports.sports_team.championships, 2009 AFC Championship Game
AFC Championship Game, time.recurring_event.current_frequency, Yearly
AFC Championship Game, sports.sports_championship.events, 2006 AFC Championship Game
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl83
Baltimore Ravens at Cleveland Browns, 2009-11-16, american_football.football_game.away_team, Baltimore Ravens
m.0_r0s7v, american_football.football_historical_coach_position.team, Baltimore Ravens
AFC Championship Game, sports.sports_championship.events, 2013 AFC Championship Game
Chicago Bears at Baltimore Ravens, 2009-12-20, american_football.football_game.home_team, Baltimore Ravens
m.04xwl7m, american_football.football_historical_coach_position.team, Pittsburgh Steelers
2002 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
1997 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
Pittsburgh Steelers, american_football.football_team.away_games, Pittsburgh Steelers at Baltimore Ravens, 2009-11-29
1992 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
Pittsburgh Steelers, american_football.football_team.away_games, Pittsburgh Steelers at Cleveland Browns, 2009-12-10
m.04xwl77, american_football.football_historical_coach_position.team, Pittsburgh Steelers
Pittsburgh Steelers, american_football.football_team.away_games, Pittsburgh Steelers at Denver Broncos, 2009-11-09
AFC North, american_football.football_division.teams, Pittsburgh Steelers
AFC Championship Game, time.recurring_event.instances, 2003 AFC Championship Game
2009 AFC Championship Game, sports.sports_championship_event.runner_up, Baltimore Ravens
m.04xwl83, american_football.football_historical_coach_position.team, Pittsburgh Steelers
Pittsburgh Steelers at Cleveland Browns, 2009-12-10, american_football.football_game.away_team, Pittsburgh Steelers
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl73
2012 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
AFC Championship Game, sports.sports_championship.league, American Football Conference
AFC Championship Game, time.recurring_event.instances, 1979 AFC Championship Game
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl8c
AFC Championship Game, time.recurring_event.instances, 1983 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 2010 AFC Championship Game
Baltimore Ravens, american_football.football_team.home_games, Cincinnati Bengals at Baltimore Ravens, 2009-10-11
Coach, people.profession.people_with_this_profession, Bill Cowher
Baltimore Ravens, american_football.football_team.home_games, Detroit Lions at Baltimore Ravens, 2009-12-13
Pittsburgh Steelers at Baltimore Ravens, 2009-11-29, american_football.football_game.away_team, Pittsburgh Steelers
AFC Championship Game, sports.sports_championship.events, 2008 AFC Championship Game
m.04xwl7r, american_football.football_historical_coach_position.team, Pittsburgh Steelers
Pittsburgh Steelers, american_football.football_team.home_games, Cincinnati Bengals at Pittsburgh Steelers, 2009-11-15
2001 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 1996 AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 1999 AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 1994 AFC Championship Game
Oakland Raiders at Pittsburgh Steelers, 2009-12-06, american_football.football_game.home_team, Pittsburgh Steelers
Minnesota Vikings at Pittsburgh Steelers, 2009-10-25, american_football.football_game.home_team, Pittsburgh Steelers
m.062_hj0, american_football.football_historical_coach_position.team, Baltimore Ravens
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at Green Bay Packers, 2009-12-07
American Football coach, people.profession.people_with_this_profession, Bill Cowher
2014 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
1999 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
m.0n_xsm9, american_football.football_historical_coach_position.team, Baltimore Ravens
2005 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
1991 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
Indianapolis Colts at Baltimore Ravens, 2009-11-22, american_football.football_game.home_team, Baltimore Ravens
1993 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
2011 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl8h
Pittsburgh Steelers, american_football.football_team.away_games, Pittsburgh Steelers at Philadelphia Eagles, 2008-09-21
AFC Championship Game, time.recurring_event.instances, 2000 AFC Championship Game
m.0n7wv_d, sports.sports_team_coach_tenure.coach, Mike Tomlin
Baltimore Ravens at Pittsburgh Steelers, 2009-01-18, american_football.football_game.away_team, Baltimore Ravens
Pittsburgh Steelers, sports.sports_team.championships, 1996 AFC Championship Game
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at Cleveland Browns, 2009-11-16
AFC Championship Game, common.topic.notable_types, Sports League Championship
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl6h
1998 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
2009 NFC Championship Game, sports.sports_championship_event.season, 2008 NFL season
AFC Championship Game, time.recurring_event.instances, 1981 AFC Championship Game
2014 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
2007 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
m.04xwl6m, american_football.football_historical_coach_position.team, Pittsburgh Steelers
Detroit Lions at Baltimore Ravens, 2009-12-13, american_football.football_game.home_team, Baltimore Ravens
AFC Championship Game, common.topic.notable_for, g.125f3f37n
Cleveland Browns at Pittsburgh Steelers, 2009-10-18, american_football.football_game.home_team, Pittsburgh Steelers
Baltimore Ravens, american_football.football_team.home_games, Denver Broncos at Baltimore Ravens, 2009-11-01
AFC Championship Game, time.recurring_event.instances, 2007 AFC Championship Game
m.09w9wmb, common.webpage.topic, AFC Championship Game
Bill Cowher, american_football.football_coach.coaching_history, m.04xwl8h
Pittsburgh Steelers at Denver Broncos, 2009-11-09, american_football.football_game.away_team, Pittsburgh Steelers
AFC Championship Game, common.topic.webpage, m.09x761_
AFC North, american_football.football_division.teams, Baltimore Ravens
1995 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 1990 AFC Championship Game
1998 AFC Championship Game, sports.sports_championship_event.runner_up, Pittsburgh Steelers
m.04xwl7c, american_football.football_historical_coach_position.team, Pittsburgh Steelers
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.away_team, Baltimore Ravens
Baltimore Ravens, american_football.football_team.home_games, Indianapolis Colts at Baltimore Ravens, 2009-11-22
Pittsburgh Steelers, american_football.football_team.division, AFC North
Pittsburgh Steelers at Baltimore Ravens, 2009-11-29, american_football.football_game.home_team, Baltimore Ravens
Pittsburgh Steelers at Kansas City Chiefs, 2009-11-22, american_football.football_game.away_team, Pittsburgh Steelers
AFC Championship Game, time.recurring_event.instances, 2009 AFC Championship Game
Pittsburgh Steelers, sports.sports_team.championships, 2011 AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 2014 AFC Championship Game
2007 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
AFC Championship Game, common.topic.webpage, m.09w9wmb
AFC Championship Game, sports.sports_championship.events, 1998 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1973 AFC Championship Game
2005 AFC Championship Game, sports.sports_championship_event.runner_up, Pittsburgh Steelers
Pittsburgh Steelers at Chicago Bears, 2009-09-20, american_football.football_game.away_team, Pittsburgh Steelers
AFC Championship Game, sports.sports_championship.events, 1992 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1993 AFC Championship Game
2006 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
m.04xwl6r, american_football.football_historical_coach_position.team, Pittsburgh Steelers
Heinz Field, location.location.events, 2011 AFC Championship Game
m.04xwl6c, american_football.football_historical_coach_position.team, Pittsburgh Steelers
m.062_hj8, american_football.football_historical_coach_position.team, Baltimore Ravens
John Harbaugh, american_football.football_coach.current_team_head_coached, Baltimore Ravens
Baltimore Ravens, american_football.football_team.home_games, Chicago Bears at Baltimore Ravens, 2009-12-20
2003 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
Pittsburgh Steelers, sports.sports_team.championships, 2006 AFC Championship Game
1999 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
AFC Championship Game, time.recurring_event.instances, 1991 AFC Championship Game
m.04xwl6_, american_football.football_historical_coach_position.team, Pittsburgh Steelers
AFC Championship Game, sports.sports_championship.events, 2009 AFC Championship Game
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl6w
AFC Championship Game, time.recurring_event.instances, 1976 AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 2000 AFC Championship Game
Baltimore Ravens, american_football.football_team.home_games, Pittsburgh Steelers at Baltimore Ravens, 2009-11-29
San Diego Chargers at Pittsburgh Steelers, 2009-01-11, american_football.football_game.home_team, Pittsburgh Steelers
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at Miami Dolphins, 2009-01-04
1996 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at Minnesota Vikings, 2009-10-18
Pittsburgh Steelers, american_football.football_team.home_games, Oakland Raiders at Pittsburgh Steelers, 2009-12-06
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl7c
m.04xwl8c, american_football.football_historical_coach_position.team, Pittsburgh Steelers
Pittsburgh Steelers, american_football.football_team.away_games, Pittsburgh Steelers at Kansas City Chiefs, 2009-11-22
1994 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
AFC Championship Game, time.recurring_event.instances, 2013 AFC Championship Game
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl7w
2008 NFL season, sports.sports_league_season.championship, 2009 AFC Championship Game
m.04xwl73, american_football.football_historical_coach_position.team, Pittsburgh Steelers
2011 AFC Championship Game, time.event.locations, Heinz Field
Pittsburgh Steelers, american_football.football_team.home_games, Green Bay Packers at Pittsburgh Steelers, 2009-12-20
Pittsburgh Steelers, american_football.football_team.home_games, Baltimore Ravens at Pittsburgh Steelers, 2009-01-18
2002 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
2005 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
2008 NFL season, sports.sports_league_season.championship, 2009 NFC Championship Game
m.09x761_, common.webpage.topic, AFC Championship Game
1988 AFC Championship Game, common.topic.notable_types, Event
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at Pittsburgh Steelers, 2009-12-27
AFC Championship Game, time.recurring_event.instances, 2004 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1974 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1989 AFC Championship Game
2009 AFC Championship Game, sports.sports_team.championships, Pittsburgh Steelers
2012 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
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.season, 2008 NFL season
1996 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
m.04xwl6h, american_football.football_historical_coach_position.team, Pittsburgh Steelers
2004 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 2011 AFC Championship Game
2013 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
Baltimore Ravens, american_football.football_team.division, AFC North
Baltimore Ravens, american_football.football_team.current_head_coach, John Harbaugh
AFC Championship Game, time.recurring_event.instances, 2006 AFC Championship Game
2008 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
AFC Championship Game, time.recurring_event.instances, 1994 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 2008 AFC Championship Game
m.04xwl7w, american_football.football_historical_coach_position.team, Pittsburgh Steelers
2011 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl7m
Pittsburgh Steelers at Detroit Lions, 2009-10-11, american_football.football_game.away_team, Pittsburgh Steelers
AFC Championship Game, sports.sports_championship.events, 2010 AFC Championship Game
San Diego Chargers at Pittsburgh Steelers, 2009-10-04, american_football.football_game.home_team, Pittsburgh Steelers
Baltimore Ravens at Pittsburgh Steelers, 2009-01-18, american_football.football_game.home_team, Pittsburgh Steelers
2012 AFC Championship Game, sports.sports_championship_event.runner_up, Baltimore Ravens
2006 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
2004 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
AFC Championship Game, freebase.valuenotation.is_reviewed, Current frequency
Baltimore Ravens at Pittsburgh Steelers, 2009-01-18, american_football.football_game.season, 2008 NFL season
AFC North, sports.sports_league.sport, American football
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at Cincinnati Bengals, 2009-11-08
AFC Championship Game, sports.sports_championship.events, 2012 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1995 AFC Championship Game
2004 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
AFC Championship Game, sports.sports_championship.events, 1993 AFC Championship Game
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at San Diego Chargers, 2009-09-20
AFC Championship Game, time.recurring_event.instances, 1997 AFC Championship Game
Green Bay Packers at Pittsburgh Steelers, 2009-12-20, american_football.football_game.home_team, Pittsburgh Steelers
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl6c
Pittsburgh Steelers, american_football.football_team.away_games, Pittsburgh Steelers at Arizona Cardinals, 2009-02-01
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl87
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl6_
2008 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1984 AFC Championship Game
2009 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
2006 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl6r
2009 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at New England Patriots, 2009-10-04
2011 AFC Championship Game, sports.sports_championship_event.champion, Pittsburgh Steelers
American Football Conference, sports.sports_league.championship, AFC Championship Game
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl8h
Pittsburgh Steelers at Arizona Cardinals, 2009-02-01, american_football.football_game.away_team, Pittsburgh Steelers
Baltimore Ravens at Tennessee Titans, 2009-01-10, american_football.football_game.away_team, Baltimore Ravens
1992 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
Cleveland Browns at Baltimore Ravens, 2009-09-27, american_football.football_game.home_team, Baltimore Ravens
1996 AFC Championship Game, sports.sports_championship_event.champion, Pittsburgh Steelers
AFC Championship Game, sports.sports_championship.events, 2005 AFC Championship Game
2005 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
Baltimore Ravens, american_football.football_team.home_games, Kansas City Chiefs at Baltimore Ravens, 2009-09-13
2014 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
Baltimore Ravens at New England Patriots, 2009-10-04, american_football.football_game.away_team, Baltimore Ravens
AFC Championship Game, time.recurring_event.instances, 1977 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1986 AFC Championship Game
2010 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
2009 AFC Championship Game, sports.sports_championship_event.champion, Pittsburgh Steelers
AFC Championship Game, time.recurring_event.instances, 2005 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1992 AFC Championship Game
Bill Cowher, people.person.profession, Coach
AFC Championship Game, time.recurring_event.instances, 1987 AFC Championship Game
m.04xwl6w, american_football.football_historical_coach_position.team, Pittsburgh Steelers
Pittsburgh Steelers, american_football.football_team.current_head_coach, Mike Tomlin
2010 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
2010 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
Baltimore Ravens, sports.sports_team.championships, 2013 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 2012 AFC Championship Game
2013 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
AFC Championship Game, sports.sports_championship.events, 1995 AFC Championship Game
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl7_
Cincinnati Bengals at Pittsburgh Steelers, 2009-11-15, american_football.football_game.home_team, Pittsburgh Steelers
2005 AFC Championship Game, time.event.locations, Heinz Field
2009 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
1990 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 2003 AFC Championship Game
Mike Tomlin, american_football.football_coach.current_team_head_coached, Pittsburgh Steelers
2002 AFC Championship Game, sports.sports_championship_event.runner_up, Pittsburgh Steelers
AFC Championship Game, freebase.valuenotation.has_no_value, Date of final occurrence
Baltimore Ravens, sports.sports_team.championships, 2001 AFC Championship Game
2009 AFC Championship Game, time.event.locations, Heinz Field
2006 AFC Championship Game, sports.sports_championship_event.champion, Pittsburgh Steelers
AFC Championship Game, time.recurring_event.instances, 1996 AFC Championship Game
2000 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
AFC Championship Game, time.recurring_event.instances, 1975 AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 2002 AFC Championship Game
Baltimore Ravens at Miami Dolphins, 2009-01-04, american_football.football_game.away_team, Baltimore Ravens
m.062_hjj, american_football.football_historical_coach_position.team, Baltimore Ravens
AFC Championship Game, sports.sports_championship.events, 1991 AFC Championship Game
2001 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
1989 AFC Championship Game, common.topic.notable_types, Event
Pittsburgh Steelers, american_football.football_team.home_games, San Diego Chargers at Pittsburgh Steelers, 2009-10-04
m.04xwl8h, american_football.football_coach.coaching_history, Bill Cowher
2009 NFC Championship Game, common.topic.notable_types, Sports League Championship Event
2007 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
2003 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
2012 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
2008 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
AFC Championship Game, sports.sports_championship.events, 2004 AFC Championship Game
Pittsburgh Steelers, american_football.football_team.home_games, San Diego Chargers at Pittsburgh Steelers, 2009-01-11
Pittsburgh Steelers, american_football.football_team.home_games, Baltimore Ravens at Pittsburgh Steelers, 2009-12-27
AFC Championship Game, time.recurring_event.instances, 1978 AFC Championship Game
m.062_hht, american_football.football_historical_coach_position.team, Baltimore Ravens
Pittsburgh Steelers, american_football.football_team.away_games, Pittsburgh Steelers at Cincinnati Bengals, 2009-09-27
Pittsburgh Steelers, american_football.football_team.away_games, Pittsburgh Steelers at Chicago Bears, 2009-09-20
Heinz Field, location.location.events, 2009 AFC Championship Game
2009 AFC Championship Game, common.topic.notable_for, g.1z2st10mn
AFC Championship Game, time.recurring_event.instances, 1988 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 2002 AFC Championship Game
Mike Tomlin, sports.sports_team_coach.teams_coached, m.0n7wv_d
AFC Championship Game, common.topic.article, m.04_607
1993 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1999 AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1998 AFC Championship Game
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.home_team, Pittsburgh Steelers
San Diego Chargers at Pittsburgh Steelers, 2009-01-11, american_football.football_game.season, 2008 NFL season
AFC Championship Game, time.recurring_event.instances, 1972 AFC Championship Game
m.04xwl8h, american_football.football_historical_coach_position.team, Pittsburgh Steelers
Baltimore Ravens at Cincinnati Bengals, 2009-11-08, american_football.football_game.away_team, Baltimore Ravens
AFC Championship Game, sports.sports_championship.events, 1997 AFC Championship Game
Pittsburgh Steelers, american_football.football_team.away_games, Pittsburgh Steelers at Detroit Lions, 2009-10-11
Baltimore Ravens, american_football.football_team.home_games, Cleveland Browns at Baltimore Ravens, 2009-09-27
Baltimore Ravens at Miami Dolphins, 2009-01-04, american_football.football_game.season, 2008 NFL season
Pittsburgh Steelers, american_football.football_team.home_games, Tennessee Titans at Pittsburgh Steelers, 2009-09-10
Cincinnati Bengals at Baltimore Ravens, 2009-10-11, american_football.football_game.home_team, Baltimore Ravens
m.04xwl8h, american_football.football_historical_coach_position.coach, Bill Cowher
Pittsburgh Steelers, american_football.football_team.home_games, Cleveland Browns at Pittsburgh Steelers, 2009-10-18
Pittsburgh Steelers, american_football.football_team.away_games, Pittsburgh Steelers at Cleveland Browns, 2008-09-14
m.04xwl7h, american_football.football_historical_coach_position.team, Pittsburgh Steelers
Baltimore Ravens at Pittsburgh Steelers, 2009-12-27, american_football.football_game.home_team, Pittsburgh Steelers
2000 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
1998 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
Baltimore Ravens at Pittsburgh Steelers, 2009-12-27, american_football.football_game.away_team, Baltimore Ravens
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at Tennessee Titans, 2009-01-10
Baltimore Ravens at Tennessee Titans, 2009-01-10, american_football.football_game.season, 2008 NFL season
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl6m
AFC Championship Game, sports.sports_championship.events, 2007 AFC Championship Game
2013 AFC Championship Game, time.event.instance_of_recurring_event, AFC Championship Game
Bill Cowher, people.person.profession, American Football coach
Baltimore Ravens at Minnesota Vikings, 2009-10-18, american_football.football_game.away_team, Baltimore Ravens
m.04xwl87, american_football.football_historical_coach_position.team, Pittsburgh Steelers
1991 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
1974 AFC Championship Game, common.topic.notable_types, Event
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at Pittsburgh Steelers, 2009-01-18
Kansas City Chiefs at Baltimore Ravens, 2009-09-13, american_football.football_game.home_team, Baltimore Ravens
2001 AFC Championship Game, sports.sports_championship_event.champion, Baltimore Ravens
Pittsburgh Steelers at Cincinnati Bengals, 2009-09-27, american_football.football_game.away_team, Pittsburgh Steelers
AFC Championship Game, sports.sports_championship.events, 2011 AFC Championship Game
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl7h
AFC Championship Game, time.recurring_event.instances, 2001 AFC Championship Game
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.away_team, Baltimore Ravens
AFC Championship Game, sports.sports_championship.events, 2001 AFC Championship Game
2013 AFC Championship Game, sports.sports_championship_event.champion, Baltimore Ravens
Denver Broncos at Baltimore Ravens, 2009-11-01, american_football.football_game.home_team, Baltimore Ravens
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl7r
m.04xwl7_, american_football.football_historical_coach_position.team, Pittsburgh Steelers
1990 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
1994 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
1995 AFC Championship Game, sports.sports_championship_event.runner_up, Pittsburgh Steelers
1997 AFC Championship Game, common.topic.notable_types, Sports League Championship Event
AFC Championship Game, time.recurring_event.instances, 1985 AFC Championship Game
Pittsburgh Steelers, american_football.football_team.historical_coaching_staff, m.04xwl77
2011 AFC Championship Game, sports.sports_championship_event.championship, AFC Championship Game
AFC Championship Game, time.recurring_event.instances, 1990 AFC Championship Game

Answer: Bill Cowher