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 dallas cowboys won the superbowl? 
Knowledge Triplets: Dallas Cowboys, sports.sports_team.championships, Super Bowl XXX
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.passing, m.07939zl
Dallas Cowboys at New York Giants, 2009-12-06, american_football.football_game.receiving, m.098jn10
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.passing, m.075rqyd
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.receiving, m.0793fnc
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.receiving, m.07938mm
Dallas Cowboys at Denver Broncos, 2009-10-04, american_football.football_game.receiving, m.07p5zwy
Dallas Cowboys at New York Giants, 2009-12-06, american_football.football_game.receiving, m.098jn39
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.receiving, m.079383s
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.rushing, m.079382m
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.receiving, m.0793b29
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.receiving, m.0793bbm
Dallas Cowboys at Cleveland Browns, 2008-09-07, common.topic.notable_for, g.1257m5nx9
The Story of the 2003 Dallas Cowboys: The Boys are Back, media_common.netflix_title.netflix_genres, Football
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.season, 2008 NFL season
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.receiving, m.0793bc4
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.receiving, m.07953m2
Dallas Cowboys at Arizona Cardinals, 2008-10-12, american_football.football_game.receiving, m.0794pfn
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.passing, m.0793b55
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, common.topic.notable_for, g.12563fn31
Dallas Cowboys at Arizona Cardinals, 2008-10-12, american_football.football_game.receiving, m.07939d6
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.rushing, m.07938kn
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.receiving, m.0793qjv
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.rushing, m.0793819
The Story of the 2003 Dallas Cowboys: The Boys are Back, common.topic.notable_for, g.1257wf_77
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.rushing, m.0793cq6
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.rushing, m.0793qdy
Dallas Cowboys at Arizona Cardinals, 2008-10-12, american_football.football_game.receiving, m.07939gd
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.passing, m.07937_s
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.passing, m.0793clf
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.rushing, m.0793mml
Dallas Cowboys at Arizona Cardinals, 2008-10-12, american_football.football_game.passing, m.0794p6h
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.receiving, m.07938pp
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.receiving, m.0793852
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.passing, m.0793ml6
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.rushing, m.07953f6
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.away_team, Dallas Cowboys
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.receiving, m.07953g1
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.receiving, m.0793ct8
Dallas Cowboys at Pittsburgh Steelers, 2008-12-07, american_football.football_game.receiving, m.0793c2r
The Story of the 2003 Dallas Cowboys: The Boys are Back, media_common.netflix_title.netflix_genres, Football Non-fiction
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.rushing, m.0793fk6
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.receiving, m.0793crs
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.receiving, m.0793fk_
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.receiving, m.0793qgp
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.receiving, m.07939l3
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, common.topic.notable_types, NFL Game
Dallas Cowboys at Arizona Cardinals, 2008-10-12, american_football.football_game.passing, m.079397s
Dallas Cowboys at New Orleans Saints, 2009-12-19, american_football.football_game.passing, m.09k0bgv
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.rushing, m.0793cpp
Dallas Cowboys at New York Giants, 2008-11-02, common.topic.notable_for, g.1258ys89t
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.passing, m.0793cn1
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.receiving, m.0793mnm
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.receiving, m.07926hm
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.season, 2008 NFL season
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.receiving, m.07938r7
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.rushing, m.07953dk
Dallas Cowboys at Pittsburgh Steelers, 2008-12-07, american_football.football_game.receiving, m.0793c27
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.rushing, m.0793mm7
Dallas Cowboys at Washington Redskins, 2008-11-16, common.topic.notable_for, g.125c7g_0p
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.rushing, m.0793qdl
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.receiving, m.0793fld
Dallas Cowboys at New York Giants, 2009-12-06, american_football.football_game.receiving, m.098jn22
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.receiving, m.0793mn_
Dallas Cowboys at Arizona Cardinals, 2008-10-12, american_football.football_game.receiving, m.0794pdy
The Story of the 2003 Dallas Cowboys: The Boys are Back, common.topic.notable_types, Film
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.receiving, m.0793qhs
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.receiving, m.0793cr5
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.rushing, m.0793mmy
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.rushing, m.0793b16
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.rushing, m.079381z
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.receiving, m.0793cv8
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.rushing, m.0793b72
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.receiving, m.075rqzw
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.receiving, m.0793cw7
Dallas Cowboys at Arizona Cardinals, 2008-10-12, american_football.football_game.receiving, m.07939bf
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.receiving, m.0793b35
Dallas Cowboys at Arizona Cardinals, 2008-10-12, american_football.football_game.receiving, m.07939c3
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.receiving, m.075rr08
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.season, 2008 NFL season
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.season, 2008 NFL season
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.away_team, Dallas Cowboys
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.receiving, m.07953l5
Dallas Cowboys at Pittsburgh Steelers, 2008-12-07, american_football.football_game.receiving, m.0793c19
Dallas Cowboys at New Orleans Saints, 2009-12-19, american_football.football_game.season, 2009 NFL season
Dallas Cowboys at Pittsburgh Steelers, 2008-12-07, american_football.football_game.season, 2008 NFL season
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.receiving, m.07939pq
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.receiving, m.075rq_l
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.receiving, m.07938ny
Dallas Cowboys at Arizona Cardinals, 2008-10-12, american_football.football_game.receiving, m.07939fq
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.receiving, m.0793bb2
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.receiving, m.0793fp9
Dallas Cowboys at Denver Broncos, 2009-10-04, american_football.football_game.receiving, m.07p5zth
Dallas Cowboys at New York Giants, 2009-12-06, american_football.football_game.receiving, m.098jn3n
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.receiving, m.0793mpp
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.receiving, m.0793qf_
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.rushing, m.07939j_
Dallas Cowboys at Denver Broncos, 2009-10-04, american_football.football_game.passing, m.07p5zk_
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.receiving, m.07953h6
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.receiving, m.07938rw
Dallas Cowboys at Washington Redskins, 2009-12-27, american_football.football_game.passing, m.09knjnq
The Story of the 2003 Dallas Cowboys: The Boys are Back, film.film.genre, Sports films
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.receiving, m.075rq_y
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.receiving, m.079386j
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.receiving, m.079384n
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.passing, m.0793qcr
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.rushing, m.0793835
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.receiving, m.07938n2
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.passing, m.07939hg
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.rushing, m.0793b69
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.passing, m.07939_5
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.passing, m.079269m
Dallas Cowboys at Pittsburgh Steelers, 2008-12-07, american_football.football_game.receiving, m.0792d34
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.receiving, m.0793fq8
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.receiving, m.0793860
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.rushing, m.0793mls
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.rushing, m.07939j3
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.receiving, m.07938nj
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.rushing, m.07938m7
The Story of the 2003 Dallas Cowboys: The Boys are Back, film.film.subjects, Dallas Cowboys
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.passing, m.0793qby
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.away_team, Dallas Cowboys
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.receiving, m.07939mw
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.passing, m.0793cmc
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.receiving, m.0793b49
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.passing, m.07953c3
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.rushing, m.075rqz5
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.rushing, m.07953d6
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.season, 2008 NFL season
The Story of the 2003 Dallas Cowboys: The Boys are Back, film.film.personal_appearances, m.0jbcr5b
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.receiving, m.0793csh
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.rushing, m.0793fjv
The Story of the 2003 Dallas Cowboys: The Boys are Back, film.film.runtime, m.0cs4k45
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.receiving, m.07939p4
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.receiving, m.07939qc
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.rushing, m.0793cnj
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.rushing, m.0793qf8
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.home_team, New York Giants
The Story of the 2003 Dallas Cowboys: The Boys are Back, film.film.genre, Short Film
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.receiving, m.0793bcr
Dallas Cowboys at New York Giants, 2009-12-06, american_football.football_game.receiving, m.098jn2g
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.receiving, m.0793qfn
Dallas Cowboys at Arizona Cardinals, 2008-10-12, american_football.football_game.receiving, m.0794pct
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.receiving, m.07926j6
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.rushing, m.07953ct
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.rushing, m.0793b7y
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.passing, m.07938j1
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.receiving, m.0793cqq
Dallas Cowboys at New York Giants, 2008-11-02, common.topic.notable_types, NFL Game
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.rushing, m.07926c9
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.receiving, m.0793qh6
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.receiving, m.0793b2r
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.rushing, m.07926dg
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.home_team, Cleveland Browns
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.receiving, m.0793fmg
Dallas Cowboys at St. Louis Rams, 2008-10-19, common.topic.notable_for, g.1259mfyhh
Dallas Cowboys at Arizona Cardinals, 2008-10-12, american_football.football_game.receiving, m.07939f1
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.receiving, m.0793qgb
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.rushing, m.07926bc
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.receiving, m.0793b3r
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.receiving, m.07939m2
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.receiving, m.07939nf
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.rushing, m.0793cp6
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.receiving, m.07953mf
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.passing, m.0793fjc
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.season, 2008 NFL season
Dallas Cowboys at Pittsburgh Steelers, 2008-12-07, american_football.football_game.rushing, m.0793byh
Dallas Cowboys at Arizona Cardinals, 2008-10-12, american_football.football_game.season, 2008 NFL season
Dallas Cowboys at Pittsburgh Steelers, 2008-12-07, american_football.football_game.passing, m.0792c_q
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.rushing, m.0793b5t
Dallas Cowboys at Pittsburgh Steelers, 2008-12-07, american_football.football_game.receiving, m.0792d3k
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.receiving, m.0793b9n
Dallas Cowboys at New York Giants, 2009-12-06, american_football.football_game.season, 2009 NFL season
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.passing, m.07938jz
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.receiving, m.0793mq2
Dallas Cowboys at Pittsburgh Steelers, 2008-12-07, american_football.football_game.passing, m.0793bwp
Dallas Cowboys at Pittsburgh Steelers, 2008-12-07, american_football.football_game.receiving, m.0792d2k
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.away_team, Dallas Cowboys
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.receiving, m.0793mpb
Dallas Cowboys at Arizona Cardinals, 2008-10-12, american_football.football_game.rushing, m.079399l
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.receiving, m.075rq_6
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.rushing, m.07939jl
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.rushing, m.0793mn8
Dallas Cowboys at Arizona Cardinals, 2008-10-12, american_football.football_game.receiving, m.0794pgd
Dallas Cowboys at Washington Redskins, 2009-12-27, american_football.football_game.receiving, m.09knjsl
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.receiving, m.07926ky
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.rushing, m.0793b07
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.receiving, m.07926fg
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.rushing, m.0793qd7
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.receiving, m.07926gd
Dallas Cowboys at New York Giants, 2008-11-02, american_football.football_game.rushing, m.0793fkm
The Story of the 2003 Dallas Cowboys: The Boys are Back, media_common.netflix_title.netflix_genres, Sports & Fitness
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.receiving, m.0793mqh
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.receiving, m.079385f
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.receiving, m.07953j9
Dallas Cowboys at Green Bay Packers, 2008-09-21, american_football.football_game.rushing, m.07938l9
Dallas Cowboys at Washington Redskins, 2008-11-16, american_football.football_game.receiving, m.0793b92
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.receiving, m.0793876
Dallas Cowboys at Philadelphia Eagles, 2008-12-28, american_football.football_game.home_team, Philadelphia Eagles
Dallas Cowboys at New York Giants, 2009-12-06, american_football.football_game.receiving, m.098jn2z
Dallas Cowboys at Arizona Cardinals, 2008-10-12, american_football.football_game.receiving, m.0794pg_
Dallas Cowboys at Cleveland Browns, 2008-09-07, american_football.football_game.receiving, m.07926k6
Dallas Cowboys at St. Louis Rams, 2008-10-19, american_football.football_game.rushing, m.07939kf

Answer: Super Bowl XXX