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 country in NATO has Sofia as its capital? 
Knowledge Triplets: Sofia, location.location.contains, Arena Armeec
Sofia, location.location.contains, g.1hb_d78x2
Sofia, location.location.contains, Hemus Hotel
Gabra, Sofia Province, location.location.containedby, Sofia
American College of Sofia, education.educational_institution.colors, Indigo
Sofia Airport, aviation.airport.hub_for, Bulgaria Air
Sofia, location.location.contains, American College of Sofia
Downtown Sofia Boby Dimitrov 1, common.image.appears_in_topic_gallery, Sofia
Central Sofia Cemetery, people.place_of_interment.interred_here, Mihail Savov
Viktor Paskov, people.person.place_of_birth, Sofia
Sofia Airport, aviation.airport.hub_for, Air Sofia
m.040rc0m, common.webpage.topic, Sofia University
Sofia, common.topic.article, m.0ftk6
Sofia, location.location.contains, National Palace of Culture
Central Sofia Cemetery, location.location.geolocation, m.0clnwyd
Bulgaria, organization.organization_scope.organizations_with_this_scope, StaySofia.net
Serdika Center Sofia, common.topic.notable_for, g.1yl5nn0jp
Capital Fort, location.location.containedby, Bulgaria
Belgium, organization.organization_founder.organizations_founded, North Atlantic Treaty Organization (NATO)
University of Forestry, Sofia, freebase.valuenotation.is_reviewed, Headquarters
Bulgaria, location.country.administrative_divisions, Plovdiv Province
National Archaeological Museum, common.topic.image, Sofia Archaeological museum
m.0h6jrb5, location.mailing_address.country, Bulgaria
Kyustendil Province, location.administrative_division.country, Bulgaria
m.045x5mp, common.webpage.topic, Sofia
Central Sofia Cemetery, people.place_of_interment.interred_here, Vasil Zlatarski
University of Forestry, Sofia, common.topic.image, LTU - main building
Sofia, government.governmental_jurisdiction.governing_officials, m.0cj5pdm
Bulgaria, location.country.capital, Sofia
Sofia, location.location.events, Siege of Sofia
Sofia, location.location.events, 1981 Women's European Volleyball Championship
m.04yz86h, location.mailing_address.citytown, Sofia
Bulgaria, location.country.administrative_divisions, Burgas Province
Arena Armeec, location.location.containedby, Sofia
Serdika Center Sofia, location.location.geolocation, m.0zn6z86
Sofia Airport, aviation.airport.hub_for, Bulgarian Air Charter
Gabra, Sofia Province, common.topic.notable_for, g.125b_1lhf
Gabra, Sofia Province, common.topic.article, m.03whpx0
Bulgaria, location.country.first_level_divisions, Silistra Province
Georgi Asparuhov Stadium, location.location.containedby, Sofia
National Palace of Culture, location.location.events, 2007 Sofia International Film Festival
Sofia University, common.topic.webpage, m.040rc0m
Sofia Airport, aviation.airport.serves, Sofia
Siege of Sofia, base.culturalevent.event.entity_involved, Second Bulgarian Empire
Italy, organization.organization_founder.organizations_founded, North Atlantic Treaty Organization (NATO)
Bulgaria, location.country.first_level_divisions, Targovishte Province
Sofia, common.topic.webpage, m.03zbkpv
m.03wyt_4, organization.organization_membership.member, Bulgaria
National Palace of Culture, location.location.events, 2005 Sofia International Film Festival
American College of Sofia, location.location.containedby, Bulgaria
Bulgaria, location.country.first_level_divisions, Ruse Province
Tsarevo municipality, location.administrative_division.country, Bulgaria
m.0qsds9z, location.administrative_division_capital_relationship.capital, Sofia
Bulgaria, location.country.first_level_divisions, Vratsa Province
m.0hqfhqv, location.mailing_address.country, Bulgaria
Bulgaria, base.aareas.schema.administrative_area.administrative_children, Sofia Province
Sofia, location.statistical_region.population, g.1jmcbf8r2
Rumelia Eyalet, location.location.contains, Sofia
Sofia Seminary, main campus, location.location.containedby, Bulgaria
Balgarska Armia Stadium, location.location.containedby, Sofia
Sofia, location.location.contains, Georgi Asparuhov Stadium
Sofia University, location.location.containedby, Bulgaria
Sofia, organization.organization_scope.organizations_with_this_scope, StaySofia.net
Bulgaria, organization.organization_scope.organizations_with_this_scope, Amasyn
Saint Sofia Church, Sofia, common.topic.article, m.0b3_84
National Palace of Culture, location.location.events, 2002 Sofia International Film Festival
Sofia, common.topic.image, Downtown Sofia Boby Dimitrov 1
Bulgaria, location.country.administrative_divisions, Lovech Province
Central Sofia Cemetery, location.location.containedby, Sofia
Bulgaria, location.country.administrative_divisions, Varna Province
Sofia, location.location.contains, g.120qdfzy
2014 Sofia Middle East & North Africa Region Film Festival, common.topic.notable_types, Film festival event
Bulgaria, organization.organization_member.member_of, m.03wyt_4
2001 Women's European Volleyball Championship, time.event.locations, Sofia
Bulgaria, location.country.administrative_divisions, Sofia
Luxembourg, organization.organization_founder.organizations_founded, North Atlantic Treaty Organization (NATO)
1981 Women's European Volleyball Championship, time.event.locations, Sofia
Sofia, common.topic.image, The Alexander Nevsky Cathedral
Sofia, location.location.contains, Yunak Stadium
The Sofia Echo, book.newspaper.circulation_areas, Sofia
Bulgaria, location.country.administrative_divisions, Smolyan Province
Sofia University, location.location.containedby, Sofia
Bulgaria, location.location.time_zones, Eastern European Time Zone
Bulgaria, location.country.first_level_divisions, Burgas Province
Central Sofia Cemetery, common.topic.notable_for, g.1258m2llc
Bulgaria, location.country.first_level_divisions, Varna Province
University of Forestry, Sofia, location.location.containedby, Sofia
Targovishte Province, location.administrative_division.country, Bulgaria
Sofia, location.statistical_region.population, g.1jmcbjxth
Sofia, location.location.contains, University of Forestry, Sofia
University of Forestry, Sofia, organization.organization.headquarters, m.0jsd9zj
StaySofia.net, organization.organization.geographic_scope, Sofia
Sofia, location.location.contains, Hotel Rodina
Bulgaria, location.country.first_level_divisions, Pleven Province
Sofia, common.topic.image, National Assembly Square in central Sofia
University of National and World Economy, organization.organization.place_founded, Bulgaria
Sofia, location.location.containedby, Bulgaria
Sofia, location.location.contains, National Academy of Arts
National Archaeological Museum, location.location.containedby, Sofia
Bulgaria, military.military_combatant.military_conflicts, m.03z967f
Sofia, location.location.contains, Vrana Palace
Blagoevgrad Province, location.administrative_division.country, Bulgaria
Sofia, common.topic.notable_for, g.1254yxmpl
StaySofia.net, organization.organization.geographic_scope, Bulgaria
Novi Iskar, location.location.containedby, Sofia
National Palace of Culture, location.location.events, 2003 Sofia International Film Festival
Gabra, Sofia Province, common.topic.notable_types, City/Town/Village
Sofia, location.location.contains, Novi Iskar
American College of Sofia, organization.organization.headquarters, m.03ll22_
m.0wfhx46, location.mailing_address.country, Bulgaria
m.0svyvxq, education.education.institution, American College of Sofia
Bulgaria, location.country.first_level_divisions, Pernik Province
National Palace of Culture, location.location.events, 2006 Sofia International Film Festival
Sofia Province, base.aareas.schema.administrative_area.administrative_parent, Bulgaria
Sofia, location.location.geolocation, m.0k2yds3
Sofia, location.location.contains, Balgarska Armia Stadium
Central Sofia Cemetery, people.place_of_interment.interred_here, Nikola Mushanov
Bulgaria, location.country.first_level_divisions, Kardzhali Province
Bulgaria, location.country.administrative_divisions, Shumen Province
Sofia, location.capital_of_administrative_division.capital_of, m.0qsds9z
Bulgaria, location.country.form_of_government, Parliamentary system
Sticky & Sweet Tour Sofia, Bulgaria Concert, time.event.locations, Vasil Levski National Stadium
North Atlantic Treaty Organization (NATO), organization.organization.founders, Denmark
Bulgaria Boulevard, common.topic.image, Bulevard Bulgaria v Sofia
Bulgaria, location.country.first_level_divisions, Stara Zagora Province
Nikola Mushanov, people.deceased_person.place_of_death, Sofia
Gabra, Sofia Province, location.location.time_zones, Eastern European Time Zone
Sofia University, common.topic.notable_for, g.1256g47lz
Razgrad Province, location.administrative_division.country, Bulgaria
Bulgaria, location.country.administrative_divisions, Kyustendil Province
Sofia, location.location.events, 2010 FILMINI International Short Film Festival
Sofia, location.location.contains, Ovcha Kupel Stadium
Yugozapaden Planning Region, location.location.contains, Sofia Province
Sofia, location.location.contains, National Sports Academy \"Vasil Levski\"
Sofia, location.location.contains, g.1hc0g359f
Sofia, periodicals.newspaper_circulation_area.newspapers, Rabotnichesko Delo
Siege of Sofia, time.event.locations, Sofia
Sofia Province, location.administrative_division.capital, m.0qsds9z
Sofia, location.location.events, 2013 International Animation Film Festival Golden Kuker - Sofia
Bulgaria, location.country.first_level_divisions, Pazardzhik Province
Sofia University, common.topic.article, m.09hx3q
m.03ll22_, location.mailing_address.citytown, Sofia
Slava Sofia, common.topic.notable_for, g.12ml1tykk
Bulgaria, location.country.official_language, Bulgarian Language
Serdika Center Sofia, architecture.building.building_function, Shopping mall
Sofia University, education.university.international_tuition, m.0h6jrwc
National Palace of Culture, location.location.events, 2008 Sofia International Film Festival
Vasil Levski National Stadium, location.location.events, Sticky & Sweet Tour Sofia, Bulgaria Concert
Siege of Sofia, base.culturalevent.event.entity_involved, Yanuka
National Palace of Culture, common.topic.image, Bulgaria-Sofia-01
Sofia, location.location.events, 2009 FILMINI International Short Film Festival
Bulgaria, location.country.first_level_divisions, Kyustendil Province
Sofia University, organization.organization.leadership, m.0h6jr7d
Sofia, location.statistical_region.population, g.11btt5q7hk
American College of Sofia, location.location.containedby, Sofia
National Assembly Square in central Sofia, common.image.size, m.02cd758
Bulgaria, location.country.administrative_divisions, Kardzhali Province
Sofia, location.location.contains, g.120wkk5f
Central Sofia Cemetery, people.place_of_interment.interred_here, Aleksandar Malinov
m.0sw00g9, education.education.institution, American College of Sofia
North Atlantic Treaty Organization (NATO), military.military_combatant.belongs_to_combatant_group, Bulgaria
Sofia, location.location.time_zones, Eastern European Time Zone
Sofia, common.topic.article, m.03zbkpk
Bulgaria, location.country.first_level_divisions, Veliko Tarnovo Province
Sofia, location.location.events, 2008 FILMINI International Short Film Festival
Rabotnichesko Delo, book.newspaper.circulation_areas, Sofia
Siege of Sofia, common.topic.notable_for, g.1259twk0j
m.0v98sq5, organization.leadership.organization, University of Forestry, Sofia
Bulgaria, base.aareas.schema.administrative_area.capital, Sofia
University of Forestry, Sofia, common.topic.image, UF main
Slava Sofia, sports.sports_team.location, Sofia
m.0svshpw, education.education.institution, American College of Sofia
University of National and World Economy, location.location.containedby, Sofia
Sofia, location.location.events, 2007 European Road Championships
Georgi Asparuhov, people.person.place_of_birth, Sofia
Serdika Center Sofia, location.location.containedby, Sofia
Sofia, location.location.contains, Krastyo Sarafov National Academy for Theatre and Film Arts
Haskovo Province, location.administrative_division.country, Bulgaria
Sofia, location.statistical_region.population, g.1jmcbfm1h
Bulgaria, base.aareas.schema.administrative_area.administrative_area_type, Sovereign state
Bulgaria, location.country.first_level_divisions, Dobrich Province
Bulgaria, location.country.first_level_divisions, Haskovo Province
The Sofia Echo, book.newspaper.headquarters, m.0h7v698
m.03lzkch, common.webpage.topic, Sofia Airport
Akademik Stadium, location.location.containedby, Sofia
Sofia, location.location.contains, Central Sofia Cemetery
Saint Sofia Church, Sofia, location.location.containedby, Sofia
Sofia, location.location.contains, Vasil Levski National Stadium
Sofia Airport, location.location.containedby, Bulgaria
Vratsa Province, location.administrative_division.country, Bulgaria
Sofia, location.location.events, Siege of Serdica
Bulgaria, location.country.first_level_divisions, Razgrad Province
Bulgaria, location.country.administrative_divisions, Pleven Province
m.09j28zf, location.mailing_address.citytown, Sofia
m.0jsh6kx, location.mailing_address.country, Bulgaria
StaySofia.net, organization.organization.place_founded, Sofia
1172, location.location.containedby, Sofia
Europe, base.locations.continents.countries_within, Bulgaria
Siege of Sofia, base.culturalevent.event.entity_involved, Lala Şahin Pasha
Bulgaria, organization.organization_scope.organizations_with_this_scope, University of National and World Economy
Bulgaria, location.country.administrative_divisions, Targovishte Province
North Atlantic Treaty Organization (NATO), organization.organization.founders, United Kingdom
DevReach 2011, time.event.locations, Sofia
Sofia, location.location.contains, Stolichna municipality
1950 Women's European Volleyball Championship, time.event.locations, Sofia
Bulgarian oblast, type.type.properties, Capital
Sofia Province, location.administrative_division.first_level_division_of, Bulgaria
Pazardzhik Province, location.administrative_division.country, Bulgaria
North Atlantic Treaty Organization (NATO), organization.organization.founders, Norway
North Atlantic Treaty Organization (NATO), organization.organization.founders, Italy
Capital Fort, location.location.containedby, Sofia
Sofia, common.topic.webpage, m.045x5mp
North Atlantic Treaty Organization (NATO), organization.organization.founders, France
m.03zbkpv, common.webpage.topic, Sofia
North Atlantic Treaty Organization (NATO), organization.organization.founders, Portugal
SEO конференция 2013, time.event.locations, Sofia
Sofia, location.statistical_region.population, g.1jmcbhqnq
National Academy of Music, location.location.containedby, Sofia
Pernik Province, location.administrative_division.country, Bulgaria
Sofia, location.location.contains, University of National and World Economy
Sofia, location.location.contains, Kempinski Hotel Zografski
m.0h7vbq_, common.webpage.topic, The Sofia Echo
Silistra Province, location.administrative_division.country, Bulgaria
Bulgaria, common.topic.notable_types, Country
Bulgaria, military.military_combatant.belongs_to_combatant_group, North Atlantic Treaty Organization (NATO)
Yambol Province, location.administrative_division.country, Bulgaria
Sofia University, freebase.valuenotation.is_reviewed, Headquarters
24 Chasa, book.newspaper.circulation_areas, Sofia
Siege of Sofia, base.culturalevent.event.entity_involved, Ottoman Empire
North Atlantic Treaty Organization (NATO), military.military_combatant.includes_allies, Bulgaria
Sofia, location.location.events, 2012 International Animation Film Festival Golden Kuker - Sofia
Sofia, location.location.events, 2008 Chelopechene explosions
Shumen Province, location.administrative_division.country, Bulgaria
Bulgaria, location.country.first_level_divisions, Sliven Province
Sofia, location.location.events, Volleyball at the 1977 Summer Universiade
Sofia, periodicals.newspaper_circulation_area.newspapers, The Sofia Echo
Sofia Seminary, main campus, location.location.containedby, Sofia
Stolichna municipality, location.location.containedby, Sofia
Kardzhali Province, location.administrative_division.country, Bulgaria
Yugozapaden Planning Region, location.location.contains, Sofia
Sofia, location.citytown.postal_codes, 1000
Sofia, location.location.events, 1970 FIVB Volleyball Men's World Championship
Bulgarian–Ottoman wars, time.event.includes_event, Siege of Sofia
Bulgaria, location.country.first_level_divisions, Smolyan Province
Bulgaria, location.country.administrative_divisions, Stara Zagora Province
Gabra, Sofia Province, location.location.geolocation, m.04z5yll
Bulgaria, location.country.administrative_divisions, Vratsa Province
Bulgaria, location.country.administrative_divisions, Gabrovo Province
Serdika Center Sofia, freebase.valuenotation.has_value, Floors
Sofia, location.location.contains, Serdika Center Sofia
Sofia, location.location.contains, Winter Sports Palace
Central Sofia Cemetery, common.topic.article, m.04gjh6z
Bulgaria, location.country.first_level_divisions, Vidin Province
Sofia, location.location.contains, CITUB Administrative Building
Saint Sofia Church, Sofia, common.topic.image, The 6th century Church of St Sophia which gave the city its name
Bulgaria, base.aareas.schema.administrative_area.administrative_children, Sofia
Sofia, location.location.contains, University of Architecture, Civil Engineering and Geodesy
Sofia, location.location.containedby, Yugozapaden Planning Region
Siege of Sarajevo, base.culturalevent.event.entity_involved, North Atlantic Treaty Organization (NATO)
Sofia, location.location.contains, National Academy of Music
Sofia, location.location.containedby, Rumelia Eyalet
National Palace of Culture, location.location.events, 2011 Sofia International Film Festival
American College of Sofia, common.topic.webpage, m.03ll22v
France, organization.organization_founder.organizations_founded, North Atlantic Treaty Organization (NATO)
Sofia, location.location.events, 2010 International Animation Film Festival Golden Kuker - Sofia
Bulgaria, location.location.containedby, Europe
National Palace of Culture, location.location.events, 2004 Sofia International Film Festival
Sofia University, organization.organization.headquarters, m.0h6jrb5
North Atlantic Treaty Organization (NATO), organization.organization.founders, Iceland
Sofia, location.location.events, SEO конференция 2013
Sofia, location.location.events, 2001 Women's European Volleyball Championship
Sofia Airport, aviation.airport.hub_for, Wizz Air Bulgaria
North Atlantic Treaty Organization (NATO), organization.organization.founders, Netherlands
American College of Sofia, organization.organization.leadership, m.0hqdvl4
Sofia, base.aareas.schema.administrative_area.administrative_area_type, Bulgarian oblast
Sofia, location.location.contains, Park Hotel Moskva
Parquet World, organization.organization.geographic_scope, Sofia
Triphon Silyanovski, people.person.place_of_birth, Sofia
Bulgaria, location.country.administrative_divisions, Veliko Tarnovo Province
Bulgaria, location.country.administrative_divisions, Tsarevo municipality
Bulgaria, location.location.containedby, Eurasia
Bulgaria, location.country.administrative_divisions, Blagoevgrad Province
m.0cj5pdm, government.government_position_held.jurisdiction_of_office, Sofia
m.03ll22_, location.mailing_address.country, Bulgaria
Sofia, location.location.contains, Sofia University
University of Forestry, Sofia, location.location.containedby, Bulgaria
Sofia Zoo, location.location.containedby, Sofia
m.0_80kvh, location.mailing_address.country, Bulgaria
Sofia, location.location.contains, g.1hhzg00cz
Sofia Airport, common.topic.webpage, m.03lzkch
Bulgaria, location.country.first_level_divisions, Gabrovo Province
Bulgaria Boulevard, transportation.road.major_cities, Sofia
Sofia, base.aareas.schema.administrative_area.administrative_parent, Bulgaria
m.0hqdvl4, organization.leadership.organization, American College of Sofia
Bulgaria, location.country.first_level_divisions, Lovech Province
Siege of Sofia, common.topic.article, m.0h3s2w7
Saint Sofia Church, Sofia, common.topic.notable_for, g.125gwr9lw
Vasil Levski National Stadium, location.location.containedby, Sofia
Sofia Airport, common.topic.article, m.03ttz6
Central Sofia Cemetery, people.place_of_interment.interred_here, Viktor Paskov
Sofia, location.location.contains, 1172
Kingdom of Greece, military.military_combatant.belongs_to_combatant_group, North Atlantic Treaty Organization (NATO)
m.0jsd9zj, location.mailing_address.country, Bulgaria
Sofia Airport, common.topic.image, Sofia Airport
Sofia Province, location.location.containedby, Yugozapaden Planning Region
Bulgaria, location.country.second_level_divisions, Sungurlare municipality
North Atlantic Treaty Organization (NATO), organization.organization.founders, Belgium
Sofia, periodicals.newspaper_circulation_area.newspapers, Capital
Yunak Stadium, location.location.containedby, Sofia
m.03z967f, military.military_combatant_group.combatants, Bulgaria
1172, location.postal_code.country, Bulgaria
Bulgaria, location.country.first_level_divisions, Blagoevgrad Province
Sofia, location.location.contains, Imperial University of Philosophy and Theology
m.03ll22_, location.mailing_address.state_province_region, Sofia Province
Gabra, Sofia Province, common.topic.image, Lazarki from Gabra
Battle of Çamurlu, time.event.locations, Sofia
Plovdiv Province, location.administrative_division.country, Bulgaria
Siege of Sofia, common.topic.notable_types, Military Conflict
Sofia Airport, aviation.airport.hub_for, Balkan Bulgarian Airlines
Sofia Airport, common.topic.image, 100 3056
m.0h6jr7d, organization.leadership.organization, Sofia University
Bulgaria, location.country.administrative_divisions, Sofia Province
National Palace of Culture, location.location.events, 2009 Sofia International Film Festival
Sofia, location.location.contains, Saint Sofia Church, Sofia
Saint Sofia Church, Sofia, common.topic.notable_types, Building
Bulgaria, location.country.administrative_divisions, Silistra Province
National Palace of Culture, location.location.containedby, Sofia
North Atlantic Treaty Organization (NATO), organization.organization.headquarters, m.04300hm
Serdika Center Sofia, freebase.valuenotation.has_value, Architectural Style
Sofia, location.location.contains, Capital Fort
Bulgaria, location.country.first_level_divisions, Shumen Province
American College of Sofia, location.location.geolocation, m.0cqr_k6
Bulgaria, location.country.administrative_divisions, Pazardzhik Province
Bulgaria, location.country.administrative_divisions, Ruse Province
National Palace of Culture, location.location.events, 2010 Sofia International Film Festival
1950 Men's European Volleyball Championship, time.event.locations, Sofia
Bulgaria, location.country.administrative_divisions, Yambol Province
Sofia, periodicals.newspaper_circulation_area.newspapers, 24 Chasa
Sofia, location.location.events, 2014 Sofia Middle East & North Africa Region Film Festival
Stara Zagora Province, location.administrative_division.country, Bulgaria
Bulgaria, location.country.first_level_divisions, Sofia Province
North Atlantic Treaty Organization (NATO), organization.organization.founders, United States of America
Varna Province, location.administrative_division.country, Bulgaria
Sofia, location.statistical_region.population, g.1jmcbg6ss
Sofia Province, location.location.containedby, Bulgaria
Serdika Center Sofia, common.topic.article, m.0ch4m59
Sofia, common.topic.notable_types, City/Town/Village
University of National and World Economy, organization.organization.place_founded, Sofia
Capital, book.newspaper.circulation_areas, Sofia
Gabra, Sofia Province, location.location.containedby, Bulgaria
Bulgaria, organization.organization_scope.organizations_with_this_scope, Parquet World
Sofia, location.location.contains, Bulgaria Boulevard
Sofia, base.biblioness.bibs_location.country, Bulgaria
Bulgaria, location.country.administrative_divisions, Haskovo Province
Sofia, location.location.contains, Sofia Zoo
Bulgaria, location.country.first_level_divisions, Yambol Province
2008 Chelopechene explosions, time.event.locations, Sofia
North Atlantic Treaty Organization (NATO), organization.organization.founders, Canada
American College of Sofia, common.topic.article, m.0cw678
Sofia, location.location.events, 2014 International Animation Film Festival Golden Kuker - Sofia
m.0wfhx46, location.mailing_address.state_province_region, Sofia Province
Bulgaria, location.country.first_level_divisions, Montana Province
Traycho Kostov, people.person.place_of_birth, Sofia
Burgas Province, location.administrative_division.country, Bulgaria
m.0chbcvy, common.webpage.topic, Sofia Airport
Sofia, location.location.contains, Gabra, Sofia Province
Siege of Sofia, time.event.included_in_event, Bulgarian–Ottoman wars
Sofia Airport, common.topic.notable_for, g.125c_38rq
National Palace of Culture, location.location.events, 2012 Sofia International Film Festival
Portugal, organization.organization_founder.organizations_founded, North Atlantic Treaty Organization (NATO)
2014 Sofia Middle East & North Africa Region Film Festival, film.film_festival_event.festival, Sofia Middle East & North Africa Region Film Festival
Bulgaria, location.country.administrative_divisions, Razgrad Province
Veliko Tarnovo Province, location.administrative_division.country, Bulgaria
Sofia, government.governmental_jurisdiction.governing_officials, m.0cj5pr9
2014 Sofia Middle East & North Africa Region Film Festival, common.topic.notable_for, g.1s056py_j
Bulgaria, location.country.administrative_divisions, Vidin Province
Serdika Center Sofia, common.topic.notable_types, Shopping center
Sofia, location.location.events, Battle of Çamurlu
Bulgaria, location.country.first_level_divisions, Plovdiv Province
Sofia, location.location.contains, Sofia Seminary, main campus
University of Architecture, Civil Engineering and Geodesy, location.location.containedby, Sofia
Sofia, location.location.events, DevReach 2011
Sofia, location.statistical_region.population, g.1jmcbdz87
Sofia, location.statistical_region.population, g.11b81t_tqg
m.0h40s6z, military.military_combatant_group.conflict, Siege of Sofia
Bulgarian coup d'état of 1923, time.event.locations, Sofia
National Assembly Square in central Sofia, common.image.appears_in_topic_gallery, Sofia
Sofia, location.administrative_division.country, Bulgaria
American College of Sofia, location.location.containedby, Europe
Bulgaria Boulevard, location.location.containedby, Sofia
National Palace of Culture, location.location.events, 2013 Sofia International Film Festival
Bulgaria, location.country.administrative_divisions, Dobrich Province
Sofia, location.location.contains, Akademik Stadium
University of National and World Economy, common.topic.image, UNWE-sofia
Bulgaria, location.country.second_level_divisions, Tsarevo municipality
Sofia, location.statistical_region.population, g.1jmcbg6sr
University of Forestry, Sofia, organization.organization.leadership, m.0v98sq5
Bulgaria, location.country.administrative_divisions, Sungurlare municipality
Sofia, base.aareas.schema.administrative_area.administrative_parent, Bulgaria
m.0cj5pr9, government.government_position_held.jurisdiction_of_office, Sofia
Bulgaria, location.country.administrative_divisions, Pernik Province
Vrana Palace, location.location.containedby, Sofia
North Atlantic Treaty Organization (NATO), organization.organization.founders, Luxembourg
m.0qsds9z, location.administrative_division_capital_relationship.administrative_division, Sofia Province
m.0h4107k, military.military_combatant_group.conflict, Siege of Sofia
Sofia, location.location.events, 1950 Women's European Volleyball Championship
Lokomotiv Stadium, location.location.containedby, Sofia
Bulgaria, location.country.administrative_divisions, Sliven Province
Sofia Airport, common.topic.webpage, m.0chbcvy
Serdika Center Sofia, freebase.valuenotation.has_value, Architect
Siege of Sofia, military.military_conflict.combatants, m.0h40s6z
Siege of Sofia, military.military_conflict.combatants, m.0h4107k
Netherlands, organization.organization_founder.organizations_founded, North Atlantic Treaty Organization (NATO)
North Atlantic Treaty Organization (NATO), military.military_combatant.includes_allies, Kingdom of Greece
Bulgaria, location.location.events, SEO конференция 2013
Sofia, location.statistical_region.population, g.1jmcbfm1g
Sofia, location.location.events, 1999 World Short Track Speed Skating Championships
University of National and World Economy, organization.organization.geographic_scope, Bulgaria
Sofia Province, base.aareas.schema.administrative_area.administrative_area_type, Bulgarian oblast
Sofia, organization.organization_scope.organizations_with_this_scope, Parquet World
Sofia, location.location.events, Bulgarian coup d'état of 1923
2014 Sofia Middle East & North Africa Region Film Festival, time.event.locations, Sofia
Sofia, location.location.nearby_airports, Sofia Airport
Sofia Province, location.administrative_division.country, Bulgaria
American College of Sofia, common.topic.image, OstranderHallACS
Sofia, location.location.contains, g.121g6sgy
2007 European Road Championships, time.event.locations, Sofia
Bulgaria, base.locations.countries.continent, Europe
Sofia, location.location.contains, Lokomotiv Stadium
Sofia, location.location.events, 1950 Men's European Volleyball Championship
Sofia, location.location.contains, National Archaeological Museum
m.03ll22v, common.webpage.topic, American College of Sofia
Central Sofia Cemetery, people.place_of_interment.interred_here, Trayko Kitanchev
Sofia Airport, location.location.geolocation, m.02_r341
Sofia, location.location.events, 2011 International Animation Film Festival Golden Kuker - Sofia
Siege of Serdica, time.event.locations, Sofia
National Academy of Arts, location.location.containedby, Sofia
Smolyan Province, location.administrative_division.country, Bulgaria
Bulgaria, location.country.administrative_divisions, Montana Province

Answer: Bulgaria