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 was the last time the oakland raiders won the super bowl? 
Knowledge Triplets: Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.passing, m.07933dx
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.receiving, m.0794mp2
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.receiving, m.0792x0m
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.rushing, m.0791qz_
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.rushing, m.07932v6
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.passing, m.07932sf
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.passing, m.07932y7
Oakland Raiders at New Orleans Saints, 2008-10-12, american_football.football_game.receiving, m.07931wm
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.rushing, m.0792ym4
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.receiving, m.07931fb
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.receiving, m.079334h
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.rushing, m.0791r16
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.season, 2008 NFL season
Oakland Raiders at Baltimore Ravens, 2008-10-26, american_football.football_game.passing, m.079322k
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.passing, m.0792yhc
Oakland Raiders at Cleveland Browns, 2009-12-27, american_football.football_game.passing, m.09kngql
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.receiving, m.0791l4c
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.rushing, m.0793307
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.receiving, m.0791l3j
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.rushing, m.0792wys
Oakland Raiders at New Orleans Saints, 2008-10-12, american_football.football_game.receiving, m.07931w_
Oakland Raiders at Baltimore Ravens, 2008-10-26, american_football.football_game.receiving, m.07932bx
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.rushing, m.079312d
Oakland Raiders at Cleveland Browns, 2009-12-27, american_football.football_game.receiving, m.09kngy9
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.receiving, m.0794mpm
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.rushing, m.0793149
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.rushing, m.0794mn9
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.receiving, m.0792yng
Oakland Raiders at Baltimore Ravens, 2008-10-26, american_football.football_game.passing, m.079218b
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.away_team, Oakland Raiders
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.passing, m.0792wt_
Oakland Raiders at Cleveland Browns, 2009-12-27, american_football.football_game.receiving, m.09kngwl
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.receiving, m.0794mnp
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.rushing, m.079319m
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.passing, m.07932tq
Oakland Raiders at Cleveland Browns, 2009-12-27, american_football.football_game.rushing, m.09kngvx
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.receiving, m.0793166
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.rushing, m.07933y7
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.passing, m.0792ygx
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.rushing, m.07936rh
Oakland Raiders at Cleveland Browns, 2009-12-27, american_football.football_game.receiving, m.09kngwy
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.rushing, m.07936qt
Oakland Raiders at Cleveland Browns, 2009-12-27, american_football.football_game.receiving, m.09kngsd
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.away_team, Oakland Raiders
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.rushing, m.07936rw
Oakland Raiders, sports.sports_team.championships, 1967 American Football League Championship Game
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.receiving, m.07932wl
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.season, 2008 NFL season
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.rushing, m.079332m
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.rushing, m.0792wxv
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.passing, m.0794ml1
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.rushing, m.07933xt
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.receiving, m.07933ld
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.receiving, m.0793339
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.rushing, m.0792ylr
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.receiving, m.07932x5
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, common.topic.notable_types, NFL Game
Oakland Raiders at Baltimore Ravens, 2008-10-26, american_football.football_game.season, 2008 NFL season
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.receiving, m.0792w_r
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.passing, m.07933fr
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.receiving, m.0791l2k
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.receiving, m.07936tc
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.rushing, m.0791l10
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.rushing, m.0791k_h
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.receiving, m.07933l1
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.receiving, m.0792x06
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.receiving, m.07933k0
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.passing, m.0793119
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.rushing, m.0791l0n
Oakland Raiders at Denver Broncos, 2008-11-23, common.topic.notable_for, g.12552mjqc
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.receiving, m.0794ms2
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.receiving, m.0794msm
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.rushing, m.07933h5
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.rushing, m.07931c3
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.rushing, m.0794mml
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.receiving, m.07931fv
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.receiving, m.0794mqh
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.receiving, m.07933kq
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.passing, m.07932t5
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.rushing, m.0793311
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.receiving, m.0792w_c
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.away_team, Oakland Raiders
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.rushing, m.0794mlk
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.passing, m.0791qyr
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.rushing, m.07936r4
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.receiving, m.079316m
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.season, 2008 NFL season
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.receiving, m.07932xm
Oakland Raiders at Cleveland Browns, 2009-12-27, american_football.football_game.receiving, m.09kngyn
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.home_team, Tampa Bay Buccaneers
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.receiving, m.07933zw
Oakland Raiders at New Orleans Saints, 2008-10-12, american_football.football_game.receiving, m.0794czz
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.receiving, m.07932vx
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.receiving, m.0792x15
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.receiving, m.07936t0
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.receiving, m.079335c
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.rushing, m.07932_8
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.receiving, m.07931d_
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.receiving, m.0791r4w
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.passing, m.07932z9
Oakland Raiders at Cleveland Browns, 2009-12-27, american_football.football_game.receiving, m.09kngsr
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.receiving, m.0792yqb
Oakland Raiders at New Orleans Saints, 2008-10-12, american_football.football_game.receiving, m.0794czj
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.receiving, m.07936sb
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.passing, m.07933wd
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.receiving, m.07933ls
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.receiving, m.07931gm
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.passing, m.0791kzn
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.receiving, m.0792wzy
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.rushing, m.079331s
Oakland Raiders, sports.sports_team.championships, 2003 AFC Championship Game
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.season, 2008 NFL season
Oakland Raiders at Baltimore Ravens, 2008-10-26, american_football.football_game.receiving, m.079327j
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.receiving, m.0791r2c
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.receiving, m.07933kc
Oakland Raiders at New Orleans Saints, 2008-10-12, american_football.football_game.receiving, m.0794c_s
1967 American Football League Championship Game, sports.sports_championship_event.champion, Oakland Raiders
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.receiving, m.0792yp2
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.receiving, m.0794mrk
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.rushing, m.0791r02
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.receiving, m.079317b
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.away_team, Oakland Raiders
Oakland Raiders at Miami Dolphins, 2008-11-16, common.topic.notable_for, g.1256lcvy2
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.rushing, m.0791r0g
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.receiving, m.0791l1f
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.rushing, m.07933gf
Oakland Raiders at Cleveland Browns, 2009-12-27, american_football.football_game.receiving, m.09kngt2
Oakland Raiders at Cleveland Browns, 2009-12-27, american_football.football_game.receiving, m.09kngxm
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.rushing, m.07933wx
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.rushing, m.0792wx4
Oakland Raiders at New Orleans Saints, 2008-10-12, american_football.football_game.passing, m.07931rd
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.passing, m.07936qb
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.receiving, m.079332z
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.receiving, m.0792yqy
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.rushing, m.07933jp
Super Bowl XVIII, sports.sports_championship_event.champion, Oakland Raiders
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.rushing, m.0792ww7
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.home_team, Buffalo Bills
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.home_team, San Diego Chargers
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.receiving, m.0792wzg
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.receiving, m.079315n
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.receiving, m.0792ypk
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.rushing, m.0792ykn
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.passing, m.0792yj9
Oakland Raiders at San Diego Chargers, 2008-12-04, common.topic.notable_for, g.1259jczsk
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.receiving, m.07932w7
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.rushing, m.0793137
Oakland Raiders at New Orleans Saints, 2008-10-12, american_football.football_game.receiving, m.07931xt
Oakland Raiders at Cleveland Browns, 2009-12-27, american_football.football_game.passing, m.09kngv3
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.rushing, m.07932_r
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.receiving, m.0791r1_
Oakland Raiders at Cleveland Browns, 2009-12-27, american_football.football_game.receiving, m.09kngy_
Oakland Raiders at Baltimore Ravens, 2008-10-26, american_football.football_game.passing, m.079218t
Oakland Raiders at Baltimore Ravens, 2008-10-26, american_football.football_game.receiving, m.079329x
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.receiving, m.07936sp
Oakland Raiders at New Orleans Saints, 2008-10-12, american_football.football_game.passing, m.0794cr3
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.receiving, m.0791l23
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.passing, m.0793183
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.rushing, m.0791r0v
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.season, 2008 NFL season
Oakland Raiders at Cleveland Browns, 2009-12-27, american_football.football_game.receiving, m.09kngx8
Oakland Raiders, sports.sports_team.championships, Super Bowl XVIII
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.rushing, m.0794mly
Oakland Raiders at Baltimore Ravens, 2008-10-26, american_football.football_game.receiving, m.07932cy
Oakland Raiders at Cleveland Browns, 2009-12-27, american_football.football_game.rushing, m.09kngrq
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.season, 2008 NFL season
Oakland Raiders at Baltimore Ravens, 2008-10-26, american_football.football_game.receiving, m.079328d
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.receiving, m.0791l57
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.receiving, m.07933z8
Oakland Raiders at Denver Broncos, 2008-11-23, american_football.football_game.receiving, m.079333r
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.receiving, m.079340t
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.receiving, m.0791r3r
Oakland Raiders at New Orleans Saints, 2008-10-12, american_football.football_game.receiving, m.07931yk
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.rushing, m.07931b7
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.rushing, m.07932vk
Oakland Raiders at San Diego Chargers, 2008-12-04, common.topic.notable_types, NFL Game
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.rushing, m.0793152
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.rushing, m.07933hz
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.rushing, m.0792yl2
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, common.topic.notable_for, g.1256xh0rg
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.receiving, m.0793419
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.receiving, m.0791r2t
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.receiving, m.0791r4c
Oakland Raiders at San Diego Chargers, 2008-12-04, american_football.football_game.away_team, Oakland Raiders
Oakland Raiders at Cleveland Browns, 2009-12-27, american_football.football_game.receiving, m.09kngxz
Oakland Raiders at Cleveland Browns, 2009-12-27, american_football.football_game.receiving, m.09kngts
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.receiving, m.07933__
Oakland Raiders at Cleveland Browns, 2009-12-27, american_football.football_game.receiving, m.09kngzb
Oakland Raiders at New Orleans Saints, 2008-10-12, american_football.football_game.rushing, m.0794ctt
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.rushing, m.0792ymr
Oakland Raiders at Tampa Bay Buccaneers, 2008-12-28, american_football.football_game.rushing, m.07933xd
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.receiving, m.07931dj
Oakland Raiders at Kansas City Chiefs, 2008-09-14, american_football.football_game.rushing, m.0792yk2
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.rushing, m.0793192
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.receiving, m.0791l30
Oakland Raiders at Miami Dolphins, 2008-11-16, american_football.football_game.receiving, m.0791r1m
Oakland Raiders at Buffalo Bills, 2008-09-21, american_football.football_game.receiving, m.07931cw

Answer: Super Bowl XVIII