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: What was the year that the Baltimore Ravens won the Superbowl over the San Francisco 49er's? 
Knowledge Triplets: Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.receiving, m.07mljf1
m.07921_4, american_football.game_receiving_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.away_team, Baltimore Ravens
Baltimore Ravens at Dallas Cowboys, 2008-12-20, american_football.football_game.season, 2008 NFL season
m.0793fyl, american_football.game_rushing_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
m.07mljcr, american_football.game_receiving_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
m.079215f, american_football.game_receiving_statistics.game, Baltimore Ravens at Miami Dolphins, 2008-10-19
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.season, 2008 NFL season
m.07mljn3, american_football.game_rushing_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.rushing, m.0792bbk
Baltimore Ravens at Miami Dolphins, 2008-10-19, american_football.football_game.passing, m.0791q2d
m.0791q7j, american_football.game_receiving_statistics.game, Baltimore Ravens at Miami Dolphins, 2008-10-19
m.07mlj62, american_football.game_passing_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
Superbowl Trophy Crop, common.image.appears_in_topic_gallery, 1960 NFL Championship Game
m.07921xm, american_football.game_rushing_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
m.0791q6v, american_football.game_receiving_statistics.game, Baltimore Ravens at Miami Dolphins, 2008-10-19
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.receiving, m.07mljr7
m.0791q75, american_football.game_receiving_statistics.game, Baltimore Ravens at Miami Dolphins, 2008-10-19
Super Bowl, sports.sports_championship.events, Super Bowl XLVII
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.rushing, m.07mljp6
m.07921zh, american_football.game_receiving_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.home_team, New York Giants
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.receiving, m.07921_4
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.receiving, m.098jp1x
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.rushing, m.07921y1
m.0793fy4, american_football.game_rushing_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
m.07mljvq, american_football.game_receiving_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
m.0792bh4, american_football.game_receiving_statistics.game, Baltimore Ravens at Pittsburgh Steelers, 2008-09-29
m.07mljrq, american_football.game_receiving_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.receiving, m.098jnws
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.passing, m.0793fwt
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.receiving, m.0792bj6
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.receiving, m.098jp1k
m.07mljgg, american_football.game_receiving_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
m.0792bfk, american_football.game_receiving_statistics.game, Baltimore Ravens at Pittsburgh Steelers, 2008-09-29
m.07mljj7, american_football.game_receiving_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
m.07920sy, american_football.game_receiving_statistics.game, Baltimore Ravens at Pittsburgh Steelers, 2008-09-29
m.07mljdj, american_football.game_receiving_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
Baltimore Ravens at New York Giants, 2008-11-16, common.topic.notable_types, NFL Game
m.079216h, american_football.game_receiving_statistics.game, Baltimore Ravens at Miami Dolphins, 2008-10-19
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.rushing, m.098jnv8
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.receiving, m.07920sl
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.receiving, m.098jnyj
m.07mlj9g, american_football.game_rushing_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.receiving, m.07mljhk
m.0793g09, american_football.game_receiving_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.receiving, m.07mljgg
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.receiving, m.079220n
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.receiving, m.07921zh
m.0793f_3, american_football.game_receiving_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.receiving, m.0792bh4
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.rushing, m.0793fxr
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.passing, m.07920nz
m.0793g0t, american_football.game_receiving_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
m.098jnz1, american_football.game_receiving_statistics.game, Baltimore Ravens at Green Bay Packers, 2009-12-07
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.rushing, m.07mlj83
m.07920s5, american_football.game_receiving_statistics.game, Baltimore Ravens at Pittsburgh Steelers, 2008-09-29
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.rushing, m.07920qk
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at San Diego Chargers, 2009-09-20
m.07921x6, american_football.game_rushing_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.receiving, m.07mljql
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.rushing, m.07920pv
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.rushing, m.07mljb6
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.passing, m.0792b9p
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.receiving, m.07mljj7
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at New York Giants, 2008-11-16
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.rushing, m.07920pf
m.07921w0, american_football.game_rushing_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
m.07mlj8k, american_football.game_rushing_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
m.0793fxr, american_football.game_rushing_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.receiving, m.07mljcr
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.receiving, m.0792bk2
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.receiving, m.098jny5
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.receiving, m.0792bhs
m.07mljjv, american_football.game_passing_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
Baltimore Ravens at San Diego Chargers, 2009-09-20, common.topic.notable_types, NFL Game
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.receiving, m.0793g0t
m.07mljs8, american_football.game_receiving_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.receiving, m.07mljs8
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.rushing, m.07mljml
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.receiving, m.07mljc1
Baltimore Ravens at Miami Dolphins, 2008-10-19, american_football.football_game.passing, m.0792135
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.receiving, m.0793g15
m.07mljlz, american_football.game_rushing_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.receiving, m.0793f_3
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.receiving, m.07921_s
San Francisco 49ers, sports.sports_championship_event.runner_up, Super Bowl XLVII
m.07921_s, american_football.game_receiving_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
m.07mljf1, american_football.game_receiving_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.receiving, m.07920s5
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.receiving, m.098jnzq
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.rushing, m.07mljn3
m.098jnzq, american_football.game_receiving_statistics.game, Baltimore Ravens at Green Bay Packers, 2009-12-07
m.0793fzj, american_football.game_receiving_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.rushing, m.0792bb_
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.receiving, m.07mljdj
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.rushing, m.0792bdq
Baltimore Ravens at Miami Dolphins, 2008-10-19, american_football.football_game.season, 2008 NFL season
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.rushing, m.0792bcp
Baltimore Ravens, sports.sports_team.championships, Super Bowl XLVII
m.07mlj83, american_football.game_rushing_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
m.098jp1k, american_football.game_receiving_statistics.game, Baltimore Ravens at Green Bay Packers, 2009-12-07
m.098jp28, american_football.game_receiving_statistics.game, Baltimore Ravens at Green Bay Packers, 2009-12-07
m.07921v3, american_football.game_passing_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.season, 2008 NFL season
Baltimore Ravens, sports.sports_team.championships, 2001 AFC Championship Game
m.07921y1, american_football.game_rushing_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
m.07mljp6, american_football.game_rushing_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.home_team, San Diego Chargers
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.rushing, m.07920qy
m.079220n, american_football.game_receiving_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
Baltimore Ravens at New York Giants, 2008-11-16, common.topic.notable_for, g.1256z3vg3
m.07mljhk, american_football.game_receiving_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.season, 2009 NFL season
San Diego Chargers, american_football.football_team.home_games, Baltimore Ravens at San Diego Chargers, 2009-09-20
m.07920r8, american_football.game_receiving_statistics.game, Baltimore Ravens at Pittsburgh Steelers, 2008-09-29
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.receiving, m.07mljq2
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.rushing, m.0793fy4
m.098jp16, american_football.game_receiving_statistics.game, Baltimore Ravens at Green Bay Packers, 2009-12-07
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.rushing, m.0793fyl
m.098jp1x, american_football.game_receiving_statistics.game, Baltimore Ravens at Green Bay Packers, 2009-12-07
m.07mljml, american_football.game_rushing_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.receiving, m.0793g09
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.receiving, m.07920r8
m.07921yz, american_football.game_receiving_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
m.07mljb6, american_football.game_rushing_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.receiving, m.098jnz1
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.passing, m.07mlj62
m.0792178, american_football.game_receiving_statistics.game, Baltimore Ravens at Miami Dolphins, 2008-10-19
m.0791q7x, american_football.game_receiving_statistics.game, Baltimore Ravens at Miami Dolphins, 2008-10-19
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.rushing, m.07mljlz
m.07mljr7, american_football.game_receiving_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
m.0792207, american_football.game_receiving_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.receiving, m.07mljrq
m.098jnxv, american_football.game_receiving_statistics.game, Baltimore Ravens at Green Bay Packers, 2009-12-07
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.rushing, m.0792bb4
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.receiving, m.098jnxh
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.rushing, m.0793fxc
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.away_team, Baltimore Ravens
Baltimore Ravens, american_football.football_team.away_games, Baltimore Ravens at Pittsburgh Steelers, 2008-09-29
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.receiving, m.098jp16
m.07mljt0, american_football.game_receiving_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
Baltimore Ravens at Cleveland Browns, 2008-11-02, american_football.football_game.season, 2008 NFL season
m.079217p, american_football.game_receiving_statistics.game, Baltimore Ravens at Miami Dolphins, 2008-10-19
m.098jnx4, american_football.game_receiving_statistics.game, Baltimore Ravens at Green Bay Packers, 2009-12-07
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.receiving, m.0792bg6
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.receiving, m.0793fzj
m.0792bhs, american_football.game_receiving_statistics.game, Baltimore Ravens at Pittsburgh Steelers, 2008-09-29
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.receiving, m.07mljvq
m.098jnxh, american_football.game_receiving_statistics.game, Baltimore Ravens at Green Bay Packers, 2009-12-07
m.0792bjl, american_football.game_receiving_statistics.game, Baltimore Ravens at Pittsburgh Steelers, 2008-09-29
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.receiving, m.07920sy
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.rushing, m.07921w0
m.07mljq2, american_football.game_receiving_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
Baltimore Ravens at San Diego Chargers, 2009-09-20, common.topic.notable_for, g.125cbz_15
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.passing, m.07mljkv
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.rushing, m.07921ws
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.receiving, m.07mljfm
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.rushing, m.07921x6
m.0793fwt, american_football.game_passing_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.rushing, m.07mlj9g
m.0793fxc, american_football.game_rushing_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.receiving, m.0792bjl
2013 AFC Championship Game, sports.sports_championship_event.champion, Baltimore Ravens
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.rushing, m.07921xm
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.receiving, m.098jnxv
m.07mlj7c, american_football.game_rushing_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.passing, m.07mljjv
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.receiving, m.0793fz1
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.receiving, m.098jnx4
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.receiving, m.098jn_1
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.receiving, m.098jp28
m.079215t, american_football.game_receiving_statistics.game, Baltimore Ravens at Miami Dolphins, 2008-10-19
m.0791q6h, american_football.game_receiving_statistics.game, Baltimore Ravens at Miami Dolphins, 2008-10-19
m.07mljc1, american_football.game_receiving_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
m.07mljfm, american_football.game_receiving_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.rushing, m.098jn_v
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.rushing, m.07mlj8k
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.receiving, m.07920rr
m.098jp0w, american_football.game_receiving_statistics.game, Baltimore Ravens at Green Bay Packers, 2009-12-07
Baltimore Ravens at Dallas Cowboys, 2008-12-20, american_football.football_game.passing, m.07922vh
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.receiving, m.0792bfk
m.07mljkv, american_football.game_passing_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
Baltimore Ravens at Pittsburgh Steelers, 2008-09-29, american_football.football_game.rushing, m.07920q5
m.07920rr, american_football.game_receiving_statistics.game, Baltimore Ravens at Pittsburgh Steelers, 2008-09-29
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.passing, m.07921v3
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.receiving, m.0792207
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.receiving, m.07mljt0
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.passing, m.098jn_d
m.079216w, american_football.game_receiving_statistics.game, Baltimore Ravens at Miami Dolphins, 2008-10-19
m.098jnyj, american_football.game_receiving_statistics.game, Baltimore Ravens at Green Bay Packers, 2009-12-07
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.season, 2009 NFL season
2001 AFC Championship Game, sports.sports_championship_event.champion, Baltimore Ravens
m.0793fz1, american_football.game_receiving_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
m.07mljql, american_football.game_receiving_statistics.game, Baltimore Ravens at San Diego Chargers, 2009-09-20
m.0793g15, american_football.game_receiving_statistics.game, Baltimore Ravens at New York Giants, 2008-11-16
Baltimore Ravens at New York Giants, 2008-11-16, american_football.football_game.receiving, m.07921yz
Baltimore Ravens at Green Bay Packers, 2009-12-07, american_football.football_game.passing, m.098jnth
Baltimore Ravens at San Diego Chargers, 2009-09-20, american_football.football_game.rushing, m.07mlj7c
m.098jny5, american_football.game_receiving_statistics.game, Baltimore Ravens at Green Bay Packers, 2009-12-07

Answer: Super Bowl XLVII