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 airport service the city that hosted the 1992 olympics? 
Knowledge Triplets: m.07ylf2s, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07yldtg, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Palau de la Metal·lúrgia, location.location.events, Fencing at the 1992 Summer Olympics – Men's foil
1992 Summer Olympics, olympics.olympic_games.demonstration_events, Women's Beach Volleyball
Football at the 1992 Summer Olympics, common.topic.notable_for, g.125f53xcp
m.07qkq5d, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Palau dels Esports de Barcelona, location.location.events, Volleyball at the 1992 Summer Olympics – Men's tournament
m.07ylf18, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Summer Olympic Games, time.recurring_event.instances, 1992 Summer Olympics
m.07ylf8j, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Palau Sant Jordi, location.location.events, Volleyball at the 1992 Summer Olympics – Men's tournament
Athletics at the 1992 Summer Olympics, common.topic.notable_for, g.125c2wltg
Diving at the 1992 Summer Olympics, common.topic.notable_for, g.1259prlvd
1992 Summer Olympics, olympics.olympic_games.participating_countries, United States of America
m.07yldrj, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, common.topic.image, Games of the XXV Olympiad
m.07yldvr, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07yldsy, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07ylfht, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Baseball
1992 Summer Olympics, olympics.olympic_games.sports, Canoe Slalom
Tennis at the 1992 Summer Olympics, common.topic.article, m.07m408
1992 Summer Olympics, olympics.olympic_games.sports, Modern pentathlon
Palau dels Esports de Barcelona, olympics.olympic_venue.olympic_events_contested_here, Volleyball at the 1992 Summer Olympics – Men's tournament
1992 Summer Olympics, olympics.olympic_games.sports, Table tennis
Palau dels Esports de Barcelona, olympics.olympic_venue.olympic_events_contested_here, Volleyball at the 1992 Summer Olympics – Women's tournament
1992 Summer Olympics, olympics.olympic_games.sports, Freestyle wrestling
m.07yldqg, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Canoe Sprint
1992 Summer Olympics, olympics.olympic_games.host_city, Barcelona
m.07yldqr, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Palau Sant Jordi, olympics.olympic_venue.olympic_games_used_in, 1992 Summer Olympics
1992 Summer Olympics, time.event.locations, Barcelona
1992 Summer Olympics, olympics.olympic_games.venues, Palau Sant Jordi
Volleyball at the 1992 Summer Olympics – Women's tournament, olympics.olympic_event_competition.venue, Palau Sant Jordi
Palau Sant Jordi, location.location.events, Volleyball at the 1992 Summer Olympics – Women's tournament
1992 Summer Olympics, olympics.olympic_games.sports, Sailing
m.07yldq5, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Men's 10m air rifle, olympics.olympic_event.olympic_games_contested, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Judo
m.07ylf1j, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07yldv7, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Dressage
m.07ylfl5, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Boxing
Palau Sant Jordi, olympics.olympic_venue.olympic_events_contested_here, Volleyball at the 1992 Summer Olympics – Men's tournament
m.04dq799, olympics.olympic_athlete_affiliation.olympics, 1992 Summer Olympics
m.07ylf92, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07yldsc, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07ylf70, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.063jcp_, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07ylf1x, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07ylfgm, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.04dq7lh, olympics.olympic_athlete_affiliation.olympics, 1992 Summer Olympics
m.07ylfgx, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07ylfg1, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Rowing
Athletics at the 1992 Summer Olympics, time.event.included_in_event, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.demonstration_sports, Beach volleyball
1992 Summer Olympics, olympics.olympic_games.sports, Water polo
Estadi de la Nova Creu Alta, olympics.olympic_venue.olympic_games_used_in, 1992 Summer Olympics
m.07yldrt, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07yldw3, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.04dq7q9, olympics.olympic_athlete_affiliation.olympics, 1992 Summer Olympics
m.06qld0t, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Volleyball at the 1992 Summer Olympics – Men's tournament, olympics.olympic_event_competition.venue, Pavelló de la Vall d'Hebron
m.07yldwc, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07ylds2, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Volleyball at the 1992 Summer Olympics – Women's tournament, time.event.locations, Palau dels Esports de Barcelona
Hockey, olympics.olympic_sport.olympic_games_contested, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.venues, Pavelló de la Vall d'Hebron
1992 Summer Olympics, olympics.olympic_games.sports, Synchronized swimming
Diving at the 1992 Summer Olympics, common.topic.article, m.0f3w29
Athletics at the 1992 Summer Olympics, common.topic.article, m.02q3t_
m.07yldtr, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Football at the 1992 Summer Olympics, common.topic.article, m.0brbzr
m.07yldyj, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Volleyball at the 1992 Summer Olympics – Men's tournament, time.event.locations, Palau dels Esports de Barcelona
m.07ylfgb, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Palau de la Metal·lúrgia, location.location.events, Fencing at the 1992 Summer Olympics – Men's team foil
m.07ylfpd, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.venues, Palau de la Metal·lúrgia
Palau de la Metal·lúrgia, location.location.events, Fencing at the 1992 Summer Olympics – Women's foil
m.07ylf50, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Palau de la Metal·lúrgia, location.location.events, Fencing at the 1992 Summer Olympics – Men's team sabre
m.07yldpc, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Barcelona, olympics.olympic_host_city.olympics_hosted, 1992 Summer Olympics
1992 Summer Olympics, time.event.instance_of_recurring_event, Summer Olympic Games
m.07ylffh, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Volleyball at the 1992 Summer Olympics – Men's tournament, olympics.olympic_event_competition.venue, Palau dels Esports de Barcelona
Palau de la Metal·lúrgia, location.location.events, Fencing at the 1992 Summer Olympics – Men's team épée
m.07ylf5x, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.06qlp21, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07yldzs, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07yldx4, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Road cycling
m.07ylfk8, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Archery
1992 Summer Olympics, olympics.olympic_games.sports, Track and field athletics
m.07ylf9y, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Badminton, olympics.olympic_sport.olympic_games_contested, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Hockey
m.07ylffs, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.06qld0t, olympics.olympic_medal_honor.event, Football at the 1992 Summer Olympics
m.07ylfjf, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Basketball, olympics.olympic_sport.olympic_games_contested, 1992 Summer Olympics
m.07yldxn, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Men's Skeet, olympics.olympic_event.olympic_games_contested, 1992 Summer Olympics
m.07yldzd, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Eventing
1992 Summer Olympics, time.event.includes_event, Tennis at the 1992 Summer Olympics
Palau dels Esports de Barcelona, olympics.olympic_venue.olympic_games_used_in, 1992 Summer Olympics
Dressage, olympics.olympic_sport.olympic_games_contested, 1992 Summer Olympics
m.07ylfb6, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Palau de la Metal·lúrgia, location.location.events, Fencing at the 1992 Summer Olympics – Men's épée
1992 Summer Olympics, olympics.olympic_games.sports, Tennis
Baseball, olympics.olympic_sport.olympic_games_contested, 1992 Summer Olympics
Cobi, olympics.olympic_mascot.olympic_games, 1992 Summer Olympics
Basketball at the 1992 Summer Olympics, common.topic.article, m.0725t2
Eventing, individual, olympics.olympic_event.olympic_games_contested, 1992 Summer Olympics
m.07ylfbh, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Tennis at the 1992 Summer Olympics, common.topic.notable_for, g.125fszdzm
Sailing, olympics.olympic_sport.olympic_games_contested, 1992 Summer Olympics
United Kingdom, olympics.olympic_participating_country.olympics_participated_in, 1992 Summer Olympics
Volleyball at the 1992 Summer Olympics – Men's tournament, olympics.olympic_event_competition.venue, Palau Sant Jordi
Pavelló de la Vall d'Hebron, olympics.olympic_venue.olympic_events_contested_here, Volleyball at the 1992 Summer Olympics – Men's tournament
Palau dels Esports de Barcelona, location.location.events, Volleyball at the 1992 Summer Olympics – Women's tournament
m.07yldys, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.participating_countries, Independent Olympic Participants
Volleyball at the 1992 Summer Olympics – Women's tournament, time.event.locations, Pavelló de la Vall d'Hebron
Volleyball at the 1992 Summer Olympics – Women's tournament, time.event.locations, Palau Sant Jordi
1992 Summer Olympics, olympics.olympic_games.demonstration_events, Men's Beach Volleyball
m.07ylf08, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Pavelló de la Vall d'Hebron, location.location.events, Volleyball at the 1992 Summer Olympics – Women's tournament
m.07ylf0x, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.051r7b0, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07yldpx, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Greco-Roman wrestling
m.07yldz0, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, time.event.includes_event, Cycling at the 1992 Summer Olympics
m.07ylf7d, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, time.event.includes_event, Basketball at the 1992 Summer Olympics
Football at the 1992 Summer Olympics, olympics.olympic_event_competition.medalists, m.06qlp21
1992 Summer Olympics, olympics.olympic_games.sports, Artistic gymnastics
m.07yldwn, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07yldpn, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.0n9f6nf, olympics.olympic_athlete_affiliation.olympics, 1992 Summer Olympics
m.0zfhv2d, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Men's 10m air pistol, olympics.olympic_event.olympic_games_contested, 1992 Summer Olympics
m.07ylfhj, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Handball
m.07ylfpn, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Pavelló de la Vall d'Hebron, olympics.olympic_venue.olympic_games_used_in, 1992 Summer Olympics
Palau de la Metal·lúrgia, olympics.olympic_venue.olympic_games_used_in, 1992 Summer Olympics
m.07yldnt, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Pavelló de la Vall d'Hebron, olympics.olympic_venue.olympic_events_contested_here, Volleyball at the 1992 Summer Olympics – Women's tournament
m.07ylf44, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07ylf5j, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07yldr8, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.06qlp21, olympics.olympic_medal_honor.event, Football at the 1992 Summer Olympics
Football at the 1992 Summer Olympics, olympics.olympic_event_competition.olympic_games_contested, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Fencing
m.0kglnkf, olympics.olympic_athlete_affiliation.olympics, 1992 Summer Olympics
Women's 10m air rifle, olympics.olympic_event.olympic_games_contested, 1992 Summer Olympics
United States of America, olympics.olympic_participating_country.olympics_participated_in, 1992 Summer Olympics
m.07ylfdh, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.participating_countries, Unified Team at the Olympics
1992 Summer Olympics, time.event.includes_event, Judo at the 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Diving
m.07ylf68, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Diving, olympics.olympic_sport.olympic_games_contested, 1992 Summer Olympics
m.051r7b0, olympics.olympic_medal_honor.event, Basketball at the 1992 Summer Olympics
m.07yldnj, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.participating_countries, United Kingdom
1992 Summer Olympics, olympics.olympic_games.sports, Olympic weightlifting
1992 Summer Olympics, common.topic.notable_for, g.1256psgmg
m.07yldsn, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07ylfc_, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Track cycling
Volleyball, olympics.olympic_sport.olympic_games_contested, 1992 Summer Olympics
Men's Rings, olympics.olympic_event.olympic_games_contested, 1992 Summer Olympics
Games of the XXV Olympiad, common.image.appears_in_topic_gallery, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Badminton
Palau de la Metal·lúrgia, location.location.events, Fencing at the 1992 Summer Olympics – Women's team foil
Volleyball at the 1992 Summer Olympics – Women's tournament, olympics.olympic_event_competition.venue, Palau dels Esports de Barcelona
Eventing, olympics.olympic_sport.olympic_games_contested, 1992 Summer Olympics
m.07ylfq4, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07ylfkx, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Shooting sport
1992 Summer Olympics, olympics.olympic_games.demonstration_sports, Roller hockey
1992 Summer Olympics, olympics.olympic_games.sports, Football
1992 Summer Olympics, common.topic.notable_types, Olympic games
1992 Summer Olympics, time.event.includes_event, Handball at the 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Volleyball
Volleyball at the 1992 Summer Olympics – Women's tournament, olympics.olympic_event_competition.venue, Pavelló de la Vall d'Hebron
Football, olympics.olympic_sport.olympic_games_contested, 1992 Summer Olympics
m.07ylfb_, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.venues, Estadi de la Nova Creu Alta
Men's Horizontal bar, olympics.olympic_event.olympic_games_contested, 1992 Summer Olympics
1992 Summer Olympics, time.event.locations, Barcelona
m.07ylfpx, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Football at the 1992 Summer Olympics, time.event.included_in_event, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.venues, Palau dels Esports de Barcelona
m.07ylf9c, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07yldp2, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Cycling at the 1992 Summer Olympics, common.topic.notable_for, g.1256z4bfz
m.07ylfj2, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Basketball
m.07yldt5, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Women's 10m air pistol, olympics.olympic_event.olympic_games_contested, 1992 Summer Olympics
m.07jsy93, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07ylf3n, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07ylf2d, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07ylf6n, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Olympic trap, olympics.olympic_event.olympic_games_contested, 1992 Summer Olympics
m.07ylf0n, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, time.event.includes_event, Athletics at the 1992 Summer Olympics
m.07ylf7s, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07ylf9n, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Independent Olympic Participants, olympics.olympic_participating_country.olympics_participated_in, 1992 Summer Olympics
m.07qkq5d, olympics.olympic_medal_honor.event, Handball at the 1992 Summer Olympics
Football at the 1992 Summer Olympics, olympics.olympic_event_competition.medalists, m.06qld0t
m.07yldr0, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Swimming
m.07ylf8t, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, olympics.olympic_games.sports, Roller hockey
1992 Summer Olympics, olympics.olympic_games.sports, Show jumping
Palau de la Metal·lúrgia, location.location.events, Fencing at the 1992 Summer Olympics – Men's sabre
m.07ylfch, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Palau Sant Jordi, olympics.olympic_venue.olympic_events_contested_here, Volleyball at the 1992 Summer Olympics – Women's tournament
Barcelona, location.location.nearby_airports, Barcelona–El Prat Airport
Tennis, olympics.olympic_sport.olympic_games_contested, 1992 Summer Olympics
Pavelló de la Vall d'Hebron, location.location.events, Volleyball at the 1992 Summer Olympics – Men's tournament
m.07ylfbh, olympics.olympic_medal_honor.event, Tennis at the 1992 Summer Olympics – Men's Singles
Volleyball at the 1992 Summer Olympics – Men's tournament, time.event.locations, Pavelló de la Vall d'Hebron
m.04dq0st, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.0cj5sdt, olympics.olympic_athlete_affiliation.olympics, 1992 Summer Olympics
m.07ylf34, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Volleyball at the 1992 Summer Olympics – Men's tournament, time.event.locations, Palau Sant Jordi
1992 Summer Olympics, common.topic.article, m.0l6mh
m.07ylfh5, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07ylf84, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
m.07ylfjq, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
1992 Summer Olympics, time.event.includes_event, Football at the 1992 Summer Olympics
1992 Summer Olympics, time.event.includes_event, Diving at the 1992 Summer Olympics
m.07yldy4, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics
Basketball at the 1992 Summer Olympics, common.topic.notable_for, g.1254y3r88
1992 Summer Olympics, olympics.olympic_games.mascot, Cobi
Basketball at the 1992 Summer Olympics, olympics.olympic_event_competition.medalists, m.051r7b0
m.07ylfkk, olympics.olympic_medal_honor.olympics, 1992 Summer Olympics

Answer: Barcelona–El Prat Airport