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 tournament events did competitors from the united states win a gold medal? 
Knowledge Triplets: United States of America, olympics.olympic_participating_country.medals_won, m.097ps1m
United States of America, olympics.olympic_participating_country.medals_won, m.0khndy0
United States of America, olympics.olympic_participating_country.medals_won, m.07ygzkl
United States of America, olympics.olympic_participating_country.medals_won, m.07mvkhl
Gold medal, sports.sport_medal.medal_winners, m.0b658s_
United States of America, olympics.olympic_participating_country.medals_won, m.04gcsx7
United States of America, sports.competitor_competition_relationship.country, m.0kmhc66
United States of America, olympics.olympic_participating_country.medals_won, m.07glb6m
m.0wg2hf2, sports.competitor_competition_relationship.competition, Swimming at the 2013 World Aquatics Championships – Women's 4 × 100 metre medley relay
United States of America, olympics.olympic_participating_country.medals_won, m.07nb5dk
United States of America, olympics.olympic_participating_country.medals_won, m.07mvl4v
United States of America, sports.competitor_competition_relationship.country, m.0b658s_
United States of America, olympics.olympic_participating_country.medals_won, m.06p1s2k
United States of America, olympics.olympic_participating_country.medals_won, m.04gc0vj
United States of America, sports.competitor_competition_relationship.country, m.0wzp362
United States of America, olympics.olympic_participating_country.medals_won, m.07htv2s
United States of America, sports.competitor_competition_relationship.country, m.0wjvgmp
United States of America, olympics.olympic_participating_country.medals_won, m.04gcwv6
United States of America, olympics.olympic_participating_country.medals_won, m.07shc1m
United States of America, olympics.olympic_participating_country.medals_won, m.090g9m6
United States of America, sports.competitor_competition_relationship.country, m.0b659zm
United States of America, olympics.olympic_participating_country.medals_won, m.07mvkgk
m.0b659jm, sports.competitor_competition_relationship.competition, 2009 World Championships in Athletics – Women's long jump
United States of America, olympics.olympic_participating_country.medals_won, m.07cmctk
United States of America, olympics.olympic_participating_country.medals_won, m.07npj4m
United States of America, sports.competitor_competition_relationship.country, m.0b64zy1
United States of America, olympics.olympic_participating_country.medals_won, m.04gcsvg
United States of America, olympics.olympic_participating_country.medals_won, m.07htv6m
United States of America, olympics.olympic_participating_country.medals_won, m.04gc8q2
Gold medal, sports.sport_medal.medal_winners, m.0b652zk
United States of America, olympics.olympic_participating_country.medals_won, m.07v7x9k
United States of America, olympics.olympic_participating_country.medals_won, m.079rn3m
m.0kmhc66, sports.tournament_event_competition.competitors, 2010 IAAF World Indoor Championships – Women's 60 metres hurdles
United States of America, sports.competitor_competition_relationship.country, m.0zftq25
m.0b658s_, sports.competitor_competition_relationship.competition, 2009 World Championships in Athletics – Men's 4 × 400 metres relay
United States of America, olympics.olympic_participating_country.medals_won, m.07cy8m4
United States of America, olympics.olympic_participating_country.medals_won, m.09k3th6
United States of America, olympics.olympic_participating_country.medals_won, m.079rn4g
United States of America, olympics.olympic_participating_country.medals_won, m.07v5dzs
United States of America, olympics.olympic_participating_country.medals_won, m.07tl80d
United States of America, olympics.olympic_participating_country.medals_won, m.07cy94k
United States of America, olympics.olympic_participating_country.medals_won, m.07ygzjk
United States of America, olympics.olympic_participating_country.medals_won, m.07glbcv
United States of America, olympics.olympic_participating_country.medals_won, m.064gc0m
United States of America, olympics.olympic_participating_country.medals_won, m.05srx2f
United States of America, olympics.olympic_participating_country.medals_won, m.06vfgbk
United States of America, olympics.olympic_participating_country.medals_won, m.07ygzlc
Gold medal, sports.sport_medal.medal_winners, m.0wg2hf2
Gold medal, sports.competitor_competition_relationship.medal, m.0b64zy1
Gold medal, sports.sport_medal.medal_winners, m.0wjn830
United States of America, olympics.olympic_participating_country.medals_won, m.07tl84f
United States of America, olympics.olympic_participating_country.medals_won, m.07ygzhc
United States of America, olympics.olympic_participating_country.medals_won, m.04gc1wm
United States of America, olympics.olympic_participating_country.medals_won, m.04gcs0k
United States of America, olympics.olympic_participating_country.medals_won, m.07n67gk
m.0b659zm, sports.competitor_competition_relationship.competition, 2009 World Championships in Athletics – Men's shot put
m.0b65bp9, sports.competitor_competition_relationship.competition, 2009 World Championships in Athletics – Men's decathlon
United States of America, olympics.olympic_participating_country.medals_won, m.064gc0r
United States of America, sports.competitor_competition_relationship.country, m.0wg2hf2
United States of America, olympics.olympic_participating_country.medals_won, m.07v5qcs
United States of America, sports.competitor_competition_relationship.country, m.0b6562w
m.0wjn830, sports.tournament_event_competition.competitors, 2013 World Championships in Athletics – Men's decathlon
United States of America, olympics.olympic_participating_country.medals_won, m.07hr9km
United States of America, olympics.olympic_participating_country.medals_won, m.04gbyxk
United States of America, olympics.olympic_participating_country.medals_won, m.04dq0vk
United States of America, olympics.olympic_participating_country.medals_won, m.04g76ys
United States of America, olympics.olympic_participating_country.medals_won, m.07v5f0k
United States of America, sports.competitor_competition_relationship.country, m.0b65510
United States of America, olympics.olympic_participating_country.medals_won, m.0krx0kf
United States of America, olympics.olympic_participating_country.medals_won, m.04gcwqs
Gold medal, sports.competitor_competition_relationship.medal, m.0b6562w
United States of America, olympics.olympic_participating_country.medals_won, m.07htvf2
United States of America, olympics.olympic_participating_country.medals_won, m.07ygzlm
United States of America, olympics.olympic_participating_country.medals_won, m.04gc8fg
United States of America, sports.competitor_competition_relationship.country, m.0b652zk
Gold medal, sports.sport_medal.medal_winners, m.0b659gn
United States of America, olympics.olympic_participating_country.medals_won, m.07mvkmq
m.0zftq25, sports.tournament_event_competition.competitors, Swimming at the 1973 World Aquatics Championships – Men's 200 metre butterfly
m.0b652rz, sports.tournament_event_competition.competitors, 2007 World Championships in Athletics – Men's 100 metres
United States of America, olympics.olympic_participating_country.medals_won, m.07hrbhv
United States of America, olympics.olympic_participating_country.medals_won, m.07n7psm
United States of America, olympics.olympic_participating_country.medals_won, m.07hr98g
United States of America, olympics.olympic_participating_country.medals_won, m.0khmz5h
United States of America, olympics.olympic_participating_country.medals_won, m.07nvdgc
United States of America, olympics.olympic_participating_country.medals_won, m.06m3w3d
United States of America, olympics.olympic_participating_country.medals_won, m.07d0h6m
m.0b652zk, sports.competitor_competition_relationship.competition, 2007 World Championships in Athletics – Women's 200 metres
United States of America, olympics.olympic_participating_country.medals_won, m.07ygzgk
United States of America, sports.competitor_competition_relationship.country, m.0b652rz
m.0wjvgmp, sports.competitor_competition_relationship.competition, 2013 PGA Championship
United States of America, sports.competitor_competition_relationship.country, m.0b6598c
United States of America, olympics.olympic_participating_country.medals_won, m.04hb88g
United States of America, olympics.olympic_participating_country.medals_won, m.07705kh
United States of America, olympics.olympic_participating_country.medals_won, m.04dq0sl
Gold medal, sports.competitor_competition_relationship.medal, m.0zfwfs7
United States of America, olympics.olympic_participating_country.medals_won, m.07ygzbk
United States of America, olympics.olympic_participating_country.medals_won, m.09k402t
United States of America, olympics.olympic_participating_country.medals_won, m.07nb5gk
United States of America, olympics.olympic_participating_country.medals_won, m.05q5pc7
Gold medal, sports.competitor_competition_relationship.medal, m.0kmh3p1
United States of America, olympics.olympic_participating_country.medals_won, m.07hs05k
United States of America, olympics.olympic_participating_country.medals_won, m.062ts7g
United States of America, olympics.olympic_participating_country.medals_won, m.0kgdh0v
United States of America, olympics.olympic_participating_country.medals_won, m.04gc6_6
United States of America, olympics.olympic_participating_country.medals_won, m.064cl4f
United States of America, olympics.olympic_participating_country.medals_won, m.064gc17
m.0b64vmj, sports.tournament_event_competition.competitors, 2009 World Championships in Athletics – Women's 200 metres
United States of America, olympics.olympic_participating_country.medals_won, m.07shc2m
Gold medal, sports.competitor_competition_relationship.medal, m.0b652rz
United States of America, olympics.olympic_participating_country.medals_won, m.065c5k9
United States of America, sports.competitor_competition_relationship.country, m.0b659c6
Gold medal, sports.competitor_competition_relationship.medal, m.0wjv1bf
United States of America, olympics.olympic_participating_country.medals_won, m.07v5f6m
United States of America, olympics.olympic_participating_country.medals_won, m.04gc8hc
United States of America, olympics.olympic_participating_country.medals_won, m.079rn6k
United States of America, olympics.olympic_participating_country.medals_won, m.04gc8kh
United States of America, olympics.olympic_participating_country.medals_won, m.07n667k
United States of America, olympics.olympic_participating_country.medals_won, m.07mvkxs
m.0b659gn, sports.competitor_competition_relationship.competition, 2009 World Championships in Athletics – Men's long jump
United States of America, olympics.olympic_participating_country.medals_won, m.07ygzfs
United States of America, olympics.olympic_participating_country.medals_won, m.07hs03v
United States of America, olympics.olympic_participating_country.medals_won, m.08n2j0m
United States of America, olympics.olympic_participating_country.medals_won, m.07gn2gp
m.0b658ys, sports.competitor_competition_relationship.competition, 2009 World Championships in Athletics – Women's 4 × 400 metres relay
United States of America, olympics.olympic_participating_country.medals_won, m.097ps1b
United States of America, olympics.olympic_participating_country.medals_won, m.07ygzhm
United States of America, sports.competitor_competition_relationship.country, m.0b6599q
United States of America, sports.competitor_competition_relationship.country, m.0zfwfs7
m.0b652wd, sports.competitor_competition_relationship.competition, 2007 World Championships in Athletics – Men's 200 metres
United States of America, olympics.olympic_participating_country.medals_won, m.07shc3m
United States of America, olympics.olympic_participating_country.medals_won, m.07tljg2
United States of America, olympics.olympic_participating_country.medals_won, m.07mvl5f
m.0kmh3p1, sports.competitor_competition_relationship.competition, 2008 IAAF World Indoor Championships – Women's 60 metres hurdles
m.0wzp362, sports.tournament_event_competition.competitors, 2013 US Open – Women's Singles
United States of America, olympics.olympic_participating_country.medals_won, m.07mvkh2
United States of America, olympics.olympic_participating_country.medals_won, m.09hxrjv
United States of America, olympics.olympic_participating_country.medals_won, m.07mvkv4
United States of America, olympics.olympic_participating_country.medals_won, m.07v5f4t
United States of America, olympics.olympic_participating_country.medals_won, m.06zr8tg
United States of America, olympics.olympic_participating_country.medals_won, m.07t4y7k
United States of America, olympics.olympic_participating_country.medals_won, m.0lj5lyk
United States of America, olympics.olympic_participating_country.medals_won, m.04gcwmq
m.0wjv1bf, sports.competitor_competition_relationship.competition, 2013 Rogers Cup – Women's Singles
United States of America, sports.competitor_competition_relationship.country, m.0b659jm
United States of America, olympics.olympic_participating_country.medals_won, m.04gds82
United States of America, olympics.olympic_participating_country.medals_won, m.07njlxk
United States of America, olympics.olympic_participating_country.medals_won, m.07v7xbf
United States of America, olympics.olympic_participating_country.medals_won, m.062sjkr
United States of America, olympics.olympic_participating_country.medals_won, m.07glbdk
United States of America, sports.competitor_competition_relationship.country, m.0b64vmj
United States of America, olympics.olympic_participating_country.medals_won, m.07sgk2k
United States of America, olympics.olympic_participating_country.medals_won, m.07hrb7g
Gold medal, sports.competitor_competition_relationship.medal, m.0b64y35
United States of America, olympics.olympic_participating_country.medals_won, m.07cm6k4
m.0b6599q, sports.tournament_event_competition.competitors, 2009 World Championships in Athletics – Women's 20 kilometres walk
United States of America, olympics.olympic_participating_country.medals_won, m.05v4075
United States of America, olympics.olympic_participating_country.medals_won, m.07th805
United States of America, olympics.olympic_participating_country.medals_won, m.07d0hbf
Gold medal, sports.competitor_competition_relationship.medal, m.0b6598c
United States of America, olympics.olympic_participating_country.medals_won, m.09cwhc1
United States of America, olympics.olympic_participating_country.medals_won, m.066lvk6
United States of America, olympics.olympic_participating_country.medals_won, m.04gc7gc
m.0b64y35, sports.tournament_event_competition.competitors, 2009 World Championships in Athletics – Men's 400 metres
United States of America, olympics.olympic_participating_country.medals_won, m.04gcwmz
United States of America, sports.competitor_competition_relationship.country, m.0wjn830
Gold medal, sports.competitor_competition_relationship.medal, m.0b653p5
United States of America, olympics.olympic_participating_country.medals_won, m.08smb4v
United States of America, olympics.olympic_participating_country.medals_won, m.0khmv0g
United States of America, olympics.olympic_participating_country.medals_won, m.04gcs5x
United States of America, olympics.olympic_participating_country.medals_won, m.08dln7v
United States of America, olympics.olympic_participating_country.medals_won, m.04gc8k6
Gold medal, sports.competitor_competition_relationship.medal, m.0wzp362
United States of America, olympics.olympic_participating_country.medals_won, m.07npg4f
m.0b65510, sports.tournament_event_competition.competitors, 2007 World Championships in Athletics – Men's 4 × 100 metres relay
United States of America, olympics.olympic_participating_country.medals_won, m.04gc1c2
United States of America, olympics.olympic_participating_country.medals_won, m.04gc8m3
United States of America, olympics.olympic_participating_country.medals_won, m.07d0hck
Gold medal, sports.competitor_competition_relationship.medal, m.0b659c6
United States of America, olympics.olympic_participating_country.medals_won, m.05v408f
United States of America, olympics.olympic_participating_country.medals_won, m.07mvkm5
United States of America, olympics.olympic_participating_country.medals_won, m.04g36c6
m.0b659c6, sports.tournament_event_competition.competitors, 2009 World Championships in Athletics – Men's 50 kilometres walk
United States of America, olympics.olympic_participating_country.medals_won, m.06zdm34
United States of America, sports.competitor_competition_relationship.country, m.0kmh3p1
United States of America, olympics.olympic_participating_country.medals_won, m.05km388
United States of America, olympics.olympic_participating_country.medals_won, m.07mvl2k
Gold medal, sports.competitor_competition_relationship.medal, m.0b65510
Gold medal, sports.sport_medal.medal_winners, m.0b659zm
United States of America, olympics.olympic_participating_country.medals_won, m.04gc878
United States of America, olympics.olympic_participating_country.medals_won, m.04gcs50
United States of America, sports.competitor_competition_relationship.country, m.0b652wd
United States of America, olympics.olympic_participating_country.medals_won, m.063y67k
United States of America, olympics.olympic_participating_country.medals_won, m.07njlsk
United States of America, olympics.olympic_participating_country.medals_won, m.07r8k8l
United States of America, olympics.olympic_participating_country.medals_won, m.07yljgc
m.0b6562w, sports.competitor_competition_relationship.competition, 2007 World Championships in Athletics – Women's 4 x 100 metres relay
United States of America, olympics.olympic_participating_country.medals_won, m.07hs08g
United States of America, olympics.olympic_participating_country.medals_won, m.04gcs6k
United States of America, sports.competitor_competition_relationship.country, m.0b653p5
United States of America, olympics.olympic_participating_country.medals_won, m.064dzdk
United States of America, olympics.olympic_participating_country.medals_won, m.09kkgqv
United States of America, olympics.olympic_participating_country.medals_won, m.0w8906m
m.0b64zy1, sports.tournament_event_competition.competitors, 2009 World Championships in Athletics – Men's 400 metres hurdles
Gold medal, sports.sport_medal.medal_winners, m.0wjvgmp
Gold medal, sports.sport_medal.medal_winners, m.0kmhc66
United States of America, sports.competitor_competition_relationship.country, m.0b64y5n
Gold medal, sports.competitor_competition_relationship.medal, m.0b6599q
Gold medal, sports.sport_medal.medal_winners, m.0b652wd
United States of America, olympics.olympic_participating_country.medals_won, m.064dz4g
Gold medal, sports.competitor_competition_relationship.medal, m.0zftq25
United States of America, sports.competitor_competition_relationship.country, m.0b659gn
m.0b653p5, sports.tournament_event_competition.competitors, 2007 World Championships in Athletics – Women's 100 metres hurdles
United States of America, olympics.olympic_participating_country.medals_won, m.07glb2m
United States of America, olympics.olympic_participating_country.medals_won, m.063wr80
United States of America, sports.competitor_competition_relationship.country, m.0b65bp9
United States of America, olympics.olympic_participating_country.medals_won, m.04gc8s4
United States of America, olympics.olympic_participating_country.medals_won, m.07ygz0k
United States of America, olympics.olympic_participating_country.medals_won, m.0khp5pk
United States of America, olympics.olympic_participating_country.medals_won, m.04dq03k
United States of America, olympics.olympic_participating_country.medals_won, m.04gc8fr
United States of America, olympics.olympic_participating_country.medals_won, m.04gcsqk
United States of America, olympics.olympic_participating_country.medals_won, m.07ylj80
United States of America, olympics.olympic_participating_country.medals_won, m.06zg0hf
United States of America, olympics.olympic_participating_country.medals_won, m.07ygzh2
Gold medal, sports.competitor_competition_relationship.medal, m.0b64vmj
United States of America, olympics.olympic_participating_country.medals_won, m.064vpct
United States of America, olympics.olympic_participating_country.medals_won, m.07hrb80
United States of America, olympics.olympic_participating_country.medals_won, m.04gc7xz
Gold medal, sports.sport_medal.medal_winners, m.0b659jm
United States of America, olympics.olympic_participating_country.medals_won, m.064cmjv
United States of America, olympics.olympic_participating_country.medals_won, m.04gc7zf
United States of America, olympics.olympic_participating_country.medals_won, m.05km2d0
United States of America, olympics.olympic_participating_country.medals_won, m.06m4500
United States of America, olympics.olympic_participating_country.medals_won, m.08dk0fv
United States of America, olympics.olympic_participating_country.medals_won, m.07zjc0s
m.0b6598c, sports.competitor_competition_relationship.competition, 2009 World Championships in Athletics – Men's 20 kilometres walk
Gold medal, sports.sport_medal.medal_winners, m.0b64y5n
m.0b64y5n, sports.tournament_event_competition.competitors, 2009 World Championships in Athletics – Women's 400 metres
United States of America, olympics.olympic_participating_country.medals_won, m.07zjc4k
United States of America, olympics.olympic_participating_country.medals_won, m.065swxm
United States of America, olympics.olympic_participating_country.medals_won, m.07hr97m
United States of America, sports.competitor_competition_relationship.country, m.0b658ys
United States of America, sports.competitor_competition_relationship.country, m.0b64y35
United States of America, sports.competitor_competition_relationship.country, m.0wjv1bf
United States of America, olympics.olympic_participating_country.medals_won, m.0987km2
United States of America, olympics.olympic_participating_country.medals_won, m.04gc6x1
m.0zfwfs7, sports.competitor_competition_relationship.competition, 1996 Indy 200 at Walt Disney World
Gold medal, sports.sport_medal.medal_winners, m.0b65bp9
United States of America, olympics.olympic_participating_country.medals_won, m.04gcwgk
United States of America, olympics.olympic_participating_country.medals_won, m.07hrb2f
Gold medal, sports.sport_medal.medal_winners, m.0b658ys
United States of America, olympics.olympic_participating_country.medals_won, m.04gbykk
United States of America, olympics.olympic_participating_country.medals_won, m.07mvzyk

Answer: 2007 World Championships in Athletics – Men's 4 × 100 metres relay
2009 World Championships in Athletics – Men's 400 metres hurdles
2013 US Open – Women's Singles
2009 World Championships in Athletics – Women's 4 × 400 metres relay
2009 World Championships in Athletics – Men's 20 kilometres walk
2009 World Championships in Athletics – Women's long jump
2009 World Championships in Athletics – Men's long jump
2007 World Championships in Athletics – Women's 200 metres
2009 World Championships in Athletics – Men's 4 × 400 metres relay
2009 World Championships in Athletics – Men's 50 kilometres walk
2007 World Championships in Athletics – Women's 4 x 100 metres relay
2009 World Championships in Athletics – Women's 20 kilometres walk
2009 World Championships in Athletics – Men's decathlon
2008 IAAF World Indoor Championships – Women's 60 metres hurdles
2009 World Championships in Athletics – Men's shot put
Swimming at the 2013 World Aquatics Championships – Women's 4 × 100 metre medley relay
2013 World Championships in Athletics – Men's decathlon
Swimming at the 1973 World Aquatics Championships – Men's 200 metre butterfly
2007 World Championships in Athletics – Women's 100 metres hurdles
1996 Indy 200 at Walt Disney World
2013 Rogers Cup – Women's Singles
2010 IAAF World Indoor Championships – Women's 60 metres hurdles
2013 PGA Championship
2007 World Championships in Athletics – Men's 100 metres
2009 World Championships in Athletics – Men's 400 metres
2009 World Championships in Athletics – Women's 400 metres
2009 World Championships in Athletics – Women's 200 metres
2007 World Championships in Athletics – Men's 200 metres