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 Eastern European country is the subject about which the speaker Gregor Belkovsky talked? 
Knowledge Triplets: Revolution In Eastern Europe, freebase.valuenotation.has_value, Start date
Great Northern War, time.event.locations, Eastern Europe
Europe, common.topic.notable_types, Continent
Eastern Europe, location.location.contains, Kievan Rus'
m.09xplj_, common.webpage.topic, Eastern Europe
Eastern Front, base.culturalevent.event.entity_involved, Prince Leopold of Bavaria
Gregor Belkovsky, event.public_speaker.speeches_or_presentations, m.08ngt52
Austro-Russian–Turkish War, base.culturalevent.event.entity_involved, Crimean Khanate
Eastern Europe, location.location.events, Hungarian invasions of Europe
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, East Francia
m.09wgvm6, common.webpage.topic, Eastern Europe
Doctor Zhivago, book.written_work.subjects, Russian Civil War
Southern Carpathians, location.location.containedby, Eastern Europe
Eastern Europe, common.topic.webpage, m.09xgv8w
Eastern Front, base.culturalevent.event.entity_involved, Franz Conrad von Hötzendorf
Soviet Union, location.country.capital, Moscow
m.0wg91_v, location.partial_containment_relationship.partially_contained_by, Eastern Europe
Eastern Europe, location.location.people_born_here, Vena Kava
Inder District, location.location.partially_containedby, Eastern Europe
m.09x5w5d, common.webpage.topic, Eastern Europe
Country, common.topic.notable_for, g.12551783b
Balkans, location.location.events, Hungarian invasions of Europe
Eastern Europe, common.topic.subject_of, Carnegie Moscow Center
Soviet Union, common.topic.notable_types, Country
Moscow, common.topic.subject_of, Carnegie Moscow Center
Carnegie Moscow Center, common.topic.subjects, Asia
Eastern Europe, common.topic.webpage, m.09wgvm6
Hungarian invasions of Europe, common.topic.notable_for, g.1259ycvy0
Eastern Front, base.culturalevent.event.entity_involved, Alexander Kerensky
Belarus, base.locations.countries.continent, Europe
Europe, location.location.partially_contains, Russian Empire
Eastern Front, base.culturalevent.event.entity_involved, Nicholas II of Russia
Europe, location.location.partially_contains, Black Sea
Eastern Europe, common.topic.webpage, m.09xyt2j
German Empire, location.location.containedby, Northern Europe
Eastern Europe, location.location.events, Tokhtamysh–Timur war
m.0wg9209, location.partial_containment_relationship.partially_contained_by, Eastern Europe
Kingdom of Romania, location.location.containedby, Eastern Europe
Balkans, location.location.containedby, Europe
Europe, location.location.partially_contains, Russia
Eastern Europe, location.location.partiallycontains, m.0wg91_p
Revolution In Eastern Europe, award.award_winning_work.awards_won, m.0105ybrn
Eastern Europe, location.location.contains_major_portion_of, Zelenov District
Eastern Front, base.culturalevent.event.entity_involved, Paul von Hindenburg
Carnegie Moscow Center, common.topic.subjects, Central Europe
Eastern Front, base.culturalevent.event.entity_involved, Aleksei Brusilov
Northern Europe, location.location.contains, Belarusian Central Council
Taskala District, location.location.containedby, Eastern Europe
Ukrainian War of Independence, time.event.locations, Central Europe
Ukraine, base.locations.countries.continent, Europe
Eastern Europe, location.location.events, Revolution In Eastern Europe
West Kazakhstan Region, location.location.partially_containedby, Eastern Europe
Western Europe, location.location.containedby, Europe
Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998, book.written_work.subjects, Foreign aid
m.09xyt2j, common.webpage.topic, Eastern Europe
Northern Europe, common.topic.image, m.02bk_9p
Austro-Russian–Turkish War, base.culturalevent.event.entity_involved, Russian Empire
m.08ngt52, event.speech_or_presentation.speech_topic, Bulgaria
m.0wg91_6, location.partial_containment_relationship.partially_contained_by, Eastern Europe
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Louis the Child
m.0b464l5, common.webpage.topic, Eastern Europe
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Luitpold, Margrave of Bavaria
Europe (UN divisions Eastern, East Central and Southeastern Europe), common.image.size, m.02dv17n
Eastern Europe, location.location.contains, Crimea
Atyrau Region, location.location.partially_containedby, Eastern Europe
Oral, location.location.containedby, Eastern Europe
Jewish population by country, event.speech_topic.speeches_or_presentations_on_this_topic, m.08ngt52
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Otto I, Holy Roman Emperor
Tsardom of Russia, common.topic.notable_types, Country
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Taksony of Hungary
Central Europe, location.location.events, Eastern Front
Hungarian invasions of Europe, time.event.locations, Western Europe
Russia, base.locations.countries.continent, Europe
Eastern Europe, common.topic.article, m.09b6m
Eastern Europe, common.topic.webpage, m.09y0w8l
Great Patriotic War, time.event.locations, Central Europe
Eastern Europe, book.book_subject.works, Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998
Eastern Europe, location.location.events, Great Patriotic War
Eastern Front, military.military_conflict.military_personnel_involved, Alexander Dutov
m.02bk_9p, common.image.appears_in_topic_gallery, Northern Europe
Western Europe, organization.organization_scope.organizations_with_this_scope, Exclaimer
m.02bk_9p, common.image.appears_in_topic_gallery, Northwestern Europe
Speaker(s), owl#inverseOf, Speeches or presentations
Eastern Europe, common.topic.webpage, m.09x_z_s
Eastern Europe, location.location.events, Eastern European anti-Communist insurgencies
Jewish population by country, event.speech_topic.speeches_or_presentations_on_this_topic, m.08ngt6r
Akzhaik District, location.location.partially_containedby, Eastern Europe
Old East Slavic, language.human_language.main_country, Kievan Rus'
Eastern European anti-Communist insurgencies, base.culturalevent.event.entity_involved, Forest Brothers
Northern Europe, location.location.contains, Swedish Empire
Polish–Swedish War, time.event.locations, Eastern Europe
Eastern Europe, location.location.contains, Moldova
Eastern European anti-Communist insurgencies, base.culturalevent.event.entity_involved, Hungarian Revolution of 1956
Gregor Belkovsky, event.speech_or_presentation.speaker_s, m.08ngt52
Eastern Front, time.event.includes_event, Russian invasion of East Prussia
Eastern European anti-Communist insurgencies, time.event.locations, Eastern Europe
Kurmangazy District, location.location.containedby, Eastern Europe
Kievan Rus', location.location.containedby, Eastern Europe
Terekti District, location.location.partially_containedby, Eastern Europe
Atyrau, location.location.partially_containedby, Eastern Europe
A Hole in the Heart of the World: Being Jewish in Eastern Europe, common.topic.notable_types, Book
Belarus, common.topic.notable_types, Country
Georgia, location.location.containedby, Eastern Europe
Eastern Front, base.culturalevent.event.entity_involved, Stefan Toshev
United Kingdom, location.location.containedby, Western Europe
Moldova, base.locations.countries.continent, Europe
Soviet Union, location.country.official_language, Russian Language
Europe (UN divisions Eastern, East Central and Southeastern Europe), common.image.appears_in_topic_gallery, Eastern Europe
Tokhtamysh–Timur war, time.event.locations, Eastern Europe
Exclaimer, organization.organization.geographic_scope, Northern Europe
Northern Europe, organization.organization_scope.organizations_with_this_scope, Exclaimer
Eastern Front, base.culturalevent.event.entity_involved, Leon Trotsky
Eastern Front, base.culturalevent.event.entity_involved, Nikola Zhekov
Russian Soviet Federative Socialist Republic, location.country.capital, Moscow
Stanisław Szeptycki, people.person.place_of_birth, Austria-Hungary
Hungarian invasions of Europe, military.military_conflict.military_personnel_involved, Bulcsú
Eastern Europe, location.location.partiallycontains, m.0wg91_j
Bulgaria, base.locations.countries.continent, Europe
Bokey Orda District, location.location.containedby, Eastern Europe
Eastern Europe, location.location.partiallycontains, m.0wg91__
Romania, base.locations.countries.continent, Europe
Eastern Front, common.topic.notable_for, g.1259vsl1h
m.09y405k, common.webpage.topic, Eastern Europe
Central Europe, location.location.events, Galicia–Volhynia Wars
Alexander Dutov, military.military_person.participated_in_conflicts, Eastern Front
Eastern Europe, location.location.contains, Kaztal District
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, West Francia
Eastern Front, common.topic.article, m.03z9sq
m.09xf_cx, common.webpage.topic, Eastern Europe
Balkans, location.location.events, Austro-Russian–Turkish War
m.0wg9204, location.partial_containment_relationship.partially_contained_by, Eastern Europe
Gregor Belkovsky, base.activism.activist.area_of_activism, Zionism
Eastern Europe, location.location.partiallycontains, m.0wg91_v
Spoken in countries, type.property.expected_type, Country
Carnegie Moscow Center, common.topic.subjects, International security
International relations, common.topic.subject_of, Carnegie Moscow Center
Location-Europe-UNsubregions, Kosovo as part of Serbia, common.image.appears_in_topic_gallery, Northwestern Europe
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Khazars
Eastern Europe, common.topic.notable_for, g.1258n9r3m
Revolution In Eastern Europe, common.topic.notable_for, g.1q56fr7j6
United Kingdom, location.location.containedby, Europe
Russian Revolution, book.book_subject.works, Doctor Zhivago
A Hole in the Heart of the World: Being Jewish in Eastern Europe, book.written_work.author, Jonathan Kaufman
Hungarian invasions of Europe, time.event.locations, Balkans
Ukraine, location.location.containedby, Europe
Russian Language, language.human_language.region, Eurasia
Galicia, event.speech_topic.speeches_or_presentations_on_this_topic, m.08ngt6r
Western Europe, location.location.contains, United Kingdom
A Hole in the Heart of the World: Being Jewish in Eastern Europe, common.topic.article, m.0703wwt
Central Europe, organization.organization_scope.organizations_with_this_scope, Exclaimer
Carnegie Moscow Center, common.topic.subjects, Think tank
Europe, location.location.partially_contains, Kazakhstan
Second Polish Republic, location.location.containedby, Central Europe
Moldova, location.location.containedby, Eastern Europe
Eastern Europe, location.location.contains, Southern Carpathians
Eastern Europe, location.location.contains, Socialist Federal Republic of Yugoslavia
Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998, book.book.editions, Collision and collusion : the strange case of western aid to Eastern Europe, 1989-1998
Stanisław Bułak-Bałachowicz, military.military_person.participated_in_conflicts, Eastern Front
Eastern Front, military.military_conflict.military_personnel_involved, Stanisław Bułak-Bałachowicz
m.0wg91_j, location.partial_containment_relationship.partially_contained_by, Eastern Europe
m.09x6gcq, common.webpage.topic, Eastern Europe
Eastern Europe, location.location.events, Eastern Front
Europe, base.locations.continents.countries_within, Romania
Exclaimer, organization.organization.geographic_scope, Eastern Europe
Northwestern Europe, common.topic.notable_types, Location
Eastern Europe, location.location.events, Austro-Russian–Turkish War
Exclaimer, organization.organization.geographic_scope, Western Europe
Eastern Europe, base.ontologies.ontology_instance.equivalent_instances, m.09klpb1
Second Polish Republic, location.location.containedby, Eastern Europe
Soviet Union, location.location.events, Eastern European anti-Communist insurgencies
Eastern Europe, location.location.contains, Kresy
Western Europe, common.topic.image, m.02bk_9p
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Henry the Fowler
Eastern Europe, location.location.contains, Taskala District
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, First Bulgarian Empire
Central Europe, location.location.contains, Second Polish Republic
m.04z4k94, people.place_lived.location, Eastern Europe
Eastern Europe, common.topic.webpage, m.09x6gcq
m.08ngt6r, event.speech_or_presentation.speech_topic, Galicia
Central Europe, location.location.partially_contains, Ukraine
Eastern Europe, location.location.partially_contains, Kazakhstan
Revolution In Eastern Europe, freebase.valuenotation.is_reviewed, Location(s)
Carnegie Moscow Center, common.topic.subjects, Europe
Hungarian invasions of Europe, common.topic.article, m.0h3r7n2
Belarus, location.location.containedby, Europe
Eastern European anti-Communist insurgencies, base.culturalevent.event.entity_involved, Cursed soldiers
Revolution In Eastern Europe, freebase.valuenotation.has_value, People involved
North Caucasus, common.topic.image, RussiaNorthernCaucasus
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Berengar I of Italy, Holy Roman Emperor
m.08ngt52, event.speech_or_presentation.speech_topic, Bulgaria
Carnegie Moscow Center, common.topic.subjects, Eastern Europe
Eastern Europe, book.book_subject.works, A Hole in the Heart of the World: Being Jewish in Eastern Europe
m.0wg91_c, location.partial_containment_relationship.partially_contained_by, Eastern Europe
m.02bk_9p, common.image.appears_in_topic_gallery, Western Europe
Spoken in countries, rdf-schema#range, Country
Eastern Front, base.culturalevent.event.entity_involved, German Empire
Eastern Europe, location.location.contains, Peremyotnoye
Revolutions of 1989, time.event.includes_event, Revolution In Eastern Europe
Russia, freebase.valuenotation.is_reviewed, Official website
Kerensky Offensive, time.event.locations, Central Europe
Northern Europe, location.location.containedby, Europe
Prague, book.book_subject.works, Franz Kafka's Noble Nighmares and Reasons
Revolution In Eastern Europe, common.topic.notable_types, Award-Winning Work
Carnegie Moscow Center, common.topic.subjects, Central Asia
Gregor Belkovsky, common.topic.notable_for, g.1254z_236
Eurasia, common.topic.notable_types, Location
Europe, base.locations.continents.countries_within, Russia
Belarusian Central Council, location.location.containedby, Eastern Europe
Great Patriotic War, time.event.locations, Eastern Europe
Bulgaria, event.speech_topic.speeches_or_presentations_on_this_topic, m.08ngt52
m.0105ybrn, award.award_honor.honored_for, Revolution In Eastern Europe
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Árpád
Northern Europe, common.topic.notable_types, Location
Asia, common.topic.notable_types, Continent
Russia, location.location.partially_containedby, Europe
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Byzantine Empire
Polish–Soviet War, time.event.locations, Eastern Europe
Eastern Europe, location.location.partially_contains, West Kazakhstan Region
Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998, book.book.genre, Non-fiction
Country, common.topic.article, m.03q0typ
Exclaimer, organization.organization.geographic_scope, Central Europe
Central Europe, common.topic.notable_types, Region
Austro-Russian–Turkish War, common.topic.notable_for, g.1257jlr39
Ukrainian Soviet Socialist Republic, common.topic.notable_types, Country
Austria-Hungary, common.topic.notable_types, Country
Country, common.topic.notable_types, Type of fictional setting
Eastern Europe, common.topic.webpage, m.0b464l5
Eastern Europe, location.location.contains, Caucasus
Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998, book.book.editions, Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998
Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998, common.topic.notable_for, g.125fj_w9c
Northwestern Europe, common.topic.image, m.02bk_9p
Hungarian invasions of Europe, time.event.includes_event, Battle of Lechfeld
Kievan Rus', location.country.official_language, Old East Slavic
Eastern Europe, location.location.contains, Prut
Eastern Front, base.culturalevent.event.entity_involved, Constantin Prezan
Eastern Europe, location.location.partially_contains, Akzhaik District
Eastern Europe, location.location.partially_contains, Atyrau Region
Carnegie Moscow Center, common.topic.subjects, International relations
Eastern Europe, common.topic.image, m.02bk_9p
Country, common.topic.notable_types, Bulgaria
Eastern Front, time.event.locations, Central Europe
Socialist Federal Republic of Yugoslavia, location.location.containedby, Eastern Europe
Revolution In Eastern Europe, time.event.included_in_event, Revolutions of 1989
m.09xgv8w, common.webpage.topic, Eastern Europe
Denmark–Norway, common.topic.notable_types, Country
Eastern Europe, common.topic.image, Europe (UN divisions Eastern, East Central and Southeastern Europe)
Eastern Europe, location.location.partiallycontains, m.0wg91_6
Central and Eastern Europe, common.topic.notable_types, Region
A Hole in the Heart of the World: Being Jewish in Eastern Europe, common.topic.notable_for, g.12558wp6w
m.09klpb1, base.ontologies.ontology_instance_mapping.freebase_topic, Eastern Europe
Central Europe, location.location.contains, Great Moravia
Austro-Russian–Turkish War, common.topic.article, m.03r9v9
East Pomeranian Offensive, base.culturalevent.event.entity_involved, Soviet Union
Hungarian invasions of Europe, common.topic.image, Kalandozasok
Asia, common.topic.subject_of, Carnegie Moscow Center
Zhanakala District, location.location.containedby, Eastern Europe
Eastern European anti-Communist insurgencies, common.topic.article, m.0gls5gc
Central Europe, common.topic.subject_of, Carnegie Moscow Center
German Empire, common.topic.notable_types, Country
Eastern Europe, common.topic.image, Location-Europe-UNsubregions, Kosovo as part of Serbia
m.09x1bwr, common.webpage.topic, Eastern Europe
A Hole in the Heart of the World: Being Jewish in Eastern Europe, book.book.genre, Non-fiction
Eastern Front, common.topic.image, The Eastern Front, as it was in 1914
Eastern Front, base.culturalevent.event.entity_involved, Ottoman Empire
Eastern Front, common.topic.image, Russian prisoners tannenberg
Revolution In Eastern Europe, time.event.locations, Eastern Europe
Eastern Europe, location.location.events, Ukrainian War of Independence
Eastern Europe, location.location.contains, Zhanakala District
m.09y0w8l, common.webpage.topic, Eastern Europe
Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998, book.written_work.author, Janine R. Wedel
Europe, base.locations.continents.countries_within, Moldova
Gregor Belkovsky, common.topic.notable_types, Public speaker
m.09ywvh0, common.webpage.topic, Country
Eastern European anti-Communist insurgencies, base.culturalevent.event.entity_involved, Ukrainian Insurgent Army
Belarusian Central Council, location.location.containedby, Northern Europe
Eastern Europe, location.location.contains, Belarusian Central Council
Eastern Europe, location.location.events, Austro-Turkish War
Jonathan Kaufman, book.author.works_written, A Hole in the Heart of the World: Being Jewish in Eastern Europe
Central Europe, location.location.events, Great Patriotic War
North Caucasus, location.location.containedby, Eastern Europe
Eastern European anti-Communist insurgencies, common.topic.notable_types, Military Conflict
Eastern Europe, location.location.contains, Romania
Eurasia, common.topic.subject_of, Carnegie Moscow Center
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Kingdom of Italy
Country, common.topic.image, Staatkundige kaart van de Wereld
Kaztal District, location.location.containedby, Eastern Europe
Public speaker, common.topic.article, m.0bz_pmq
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Lehel
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Al-Andalus
Eastern Europe, location.location.contains, North Caucasus
Jewish people, book.book_subject.works, A Hole in the Heart of the World: Being Jewish in Eastern Europe
Eastern Europe, location.location.contains, Isatay District
Romania, location.location.containedby, Europe
Caucasus, location.location.containedby, Eastern Europe
Politics, common.topic.subject_of, Carnegie Moscow Center
Northern Europe, location.location.contains, German Empire
Ukraine, location.location.partially_containedby, Central Europe
Eastern Europe, base.schemastaging.context_name.pronunciation, g.125_llnl3
Western Europe, location.location.events, Hungarian invasions of Europe
Eastern Europe, common.topic.webpage, m.09x5w5d
The Guns of August, book.written_work.subjects, Eastern Front
Eastern Front, book.book_subject.works, The Guns of August
m.09ywzbk, common.webpage.topic, Country
Old East Slavic, common.topic.notable_types, Human Language
Carnegie Moscow Center, common.topic.subjects, Politics
Hungarian invasions of Europe, time.event.locations, Eastern Europe
Eastern Europe, location.location.events, Russo-Turkish War
Europe, location.location.partially_contains, Georgia
Austro-Russian–Turkish War, common.topic.notable_types, Military Conflict
Central Europe, location.location.events, Polish–Soviet War
Eastern Europe, location.location.events, Great Northern War
Eastern Europe, common.topic.webpage, m.09wst1h
Northwestern Europe, common.topic.image, Location-Europe-UNsubregions, Kosovo as part of Serbia
Eastern European anti-Communist insurgencies, base.culturalevent.event.entity_involved, Romanian anti-communist resistance movement
East Prussian Offensive, base.culturalevent.event.entity_involved, Soviet Union
Eastern Front, book.book_subject.works, Doctor Zhivago
Russia, common.topic.subject_of, Carnegie Moscow Center
Prut, location.location.containedby, Eastern Europe
Austro-Turkish War, time.event.locations, Eastern Europe
Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998, common.topic.notable_types, Book
Eastern Europe, location.location.partiallycontains, m.0wg91_c
Eastern Europe, location.location.partially_contains, Inder District
Central and Eastern Europe, location.location.contains, Socialist Federal Republic of Yugoslavia
Russian Soviet Federative Socialist Republic, common.topic.notable_types, Country
Socialist Federal Republic of Yugoslavia, location.location.containedby, Central and Eastern Europe
Eastern Europe, common.topic.webpage, m.09y405k
Eastern Europe, location.location.events, Polish–Soviet War
Country, common.topic.article, m.01lfr
North Caucasus, common.topic.article, m.02fswg
Carnegie Moscow Center, common.topic.subjects, Russia
Kresy, location.location.containedby, Eastern Europe
Eastern Europe, location.location.contains, Rus'
Austro-Turkish War, common.topic.notable_for, g.1q3sgxv1k
Eastern Europe, location.location.contains, Bokey Orda District
Revolution In Eastern Europe, freebase.valuenotation.has_no_value, Instance of recurring event
Eastern Europe, location.location.contains, Belarusian People's Republic
Ukraine, location.location.primarily_containedby, Eastern Europe
m.09wy877, common.webpage.topic, Country
m.08ngt6r, event.speech_or_presentation.speech_topic, Jewish population by country
Rus', location.location.containedby, Eastern Europe
Europe, base.locations.continents.countries_within, Belarus
m.08ngt52, event.speech_or_presentation.speech_topic, Jewish population by country
Eastern Europe, location.location.contains, Zhanybek District
Belarusian People's Republic, location.location.containedby, Eastern Europe
Hungarian invasions of Europe, common.topic.notable_types, Military Conflict
Eastern Europe, location.location.contains, Second Polish Republic
Eastern Europe, location.location.events, Polish–Swedish War
Eastern Europe, location.location.partially_contains, Terekti District
Zelenov District, location.location.primarily_containedby, Eastern Europe
Eastern Europe, location.location.partially_contains, Atyrau
Carnegie Moscow Center, common.topic.subjects, Economics
Europe, base.locations.continents.countries_within, Ukraine
Ukrainian War of Independence, time.event.locations, Eastern Europe
Eastern Europe, location.location.containedby, Bulgaria
Eastern Europe, location.location.contains, Galicia
Ukraine, common.topic.notable_types, Country
East Prussian Offensive, common.topic.notable_types, Military Conflict
Bulgaria, location.location.containedby, Eastern Europe
A Hole in the Heart of the World: Being Jewish in Eastern Europe, book.book.editions, A Hole in the Heart of the World: Being Jewish in Eastern Europe
Eastern Europe, location.location.contains, Kingdom of Romania
Vena Kava, people.person.place_of_birth, Eastern Europe
A Hole in the Heart of the World: Being Jewish in Eastern Europe, book.written_work.subjects, Jewish people
Central Asia, common.topic.notable_types, Location
Eastern Europe, common.topic.webpage, m.09x1bwr
Grand Duchy of Lithuania, location.location.containedby, Eastern Europe
Austro-Russian–Turkish War, time.event.locations, Eastern Europe
Austro-Russian–Turkish War, time.event.locations, Balkans
Eastern Front, time.event.locations, Eastern Europe
Eastern Europe, location.location.partiallycontains, m.0wg9209
Russia, location.country.capital, Moscow
Central and Eastern Europe, location.location.containedby, Europe
Eastern European anti-Communist insurgencies, common.topic.notable_for, g.1255l1vcg
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Middle Francia
Location-Europe-UNsubregions, Kosovo as part of Serbia, common.image.appears_in_topic_gallery, Eastern Europe
Eastern Front, common.topic.image, Defenders NGM-v31-p369-A
Carnegie Moscow Center, common.topic.subjects, Eurasia
m.0wg91__, location.partial_containment_relationship.partially_contained_by, Eastern Europe
Eastern Europe, common.topic.notable_types, Location
Eastern European anti-Communist insurgencies, base.culturalevent.event.entity_involved, Eastern Bloc
United Kingdom, base.locations.countries.continent, Europe
Russo-Turkish War, time.event.locations, Eastern Europe
Europe, base.locations.continents.countries_within, United Kingdom
Eastern Europe, location.location.partially_contains, Makhambet District
Central Europe, location.location.events, Ukrainian War of Independence
Eastern Europe, organization.organization_scope.organizations_with_this_scope, Exclaimer
m.0wg91_p, location.partial_containment_relationship.partially_contained_by, Eastern Europe
Doctor Zhivago, book.written_work.subjects, Eastern Front
Galicia–Volhynia Wars, time.event.locations, Central Europe
Eastern Europe, location.location.contains, Georgia
m.09x_z_s, common.webpage.topic, Eastern Europe
Eastern Europe, location.location.people_born_here, Sam Borenstein
Eastern Europe, common.topic.webpage, m.09xf_cx
Eastern Europe, location.location.partiallycontains, m.0wg9204
Kazakhstan, location.location.partially_containedby, Eastern Europe
A Hole in the Heart of the World: Being Jewish in Eastern Europe, book.written_work.subjects, Eastern Europe
Polish–Soviet War, time.event.locations, Central Europe
Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998, common.topic.article, m.075xffj
Carnegie Moscow Center, common.topic.subjects, Foreign policy
Eastern Front, base.culturalevent.event.entity_involved, Grand Duke Nicholas Nikolaevich of Russia
Carnegie Moscow Center, common.topic.subjects, Moscow
Eastern Europe, location.location.containedby, Europe
Country, common.topic.image, Europe topography map
Crimea, location.location.containedby, Eastern Europe
Revolution In Eastern Europe, freebase.valuenotation.has_value, End date
Eastern Europe, location.location.contains, Grand Duchy of Lithuania
Caucasus, common.topic.subject_of, Carnegie Moscow Center
m.09ysrxm, common.webpage.topic, Eastern Europe
Isatay District, location.location.containedby, Eastern Europe
Eastern Europe, location.location.contains, Bulgaria
Europe, location.location.partially_contains, Soviet Union
m.02bk_9p, common.image.appears_in_topic_gallery, Eastern Europe
Romania, location.location.containedby, Eastern Europe
Romania, common.topic.notable_types, Country
Central Europe, location.location.containedby, Europe
Makhambet District, location.location.partially_containedby, Eastern Europe
Eastern Europe, common.topic.webpage, m.09xplj_
Galicia, location.location.containedby, Eastern Europe
Moscow, location.location.containedby, Europe
Kievan Rus', location.location.events, Bolesław I's intervention in the Kievan succession crisis
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Great Moravia
Austria-Hungary, location.location.containedby, Europe
Russia, common.topic.notable_types, Country
Moscow, base.biblioness.bibs_topic.subsumes, Moscow
m.09wst1h, common.webpage.topic, Eastern Europe
Eastern Europe, location.location.contains_major_portion_of, Ukraine
m.08ngt52, event.speech_or_presentation.speaker_s, Gregor Belkovsky
Austro-Russian–Turkish War, military.military_conflict.military_personnel_involved, Alexei Senyavin
Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998, book.written_work.subjects, Eastern Europe
Eastern Europe, location.location.contains, Kurmangazy District
Austro-Russian–Turkish War, base.culturalevent.event.entity_involved, Cossack Hetmanate
Carnegie Moscow Center, common.topic.subjects, Analysis
Russian Empire, common.topic.notable_types, Country
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Arnulf, Duke of Bavaria
North Caucasus, common.topic.notable_for, g.1255l0dnw
Europe, base.locations.continents.countries_within, Bulgaria
United Kingdom, common.topic.notable_types, Country
Zhanybek District, location.location.containedby, Eastern Europe
Eastern European anti-Communist insurgencies, time.event.locations, Soviet Union
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Conrad, Duke of Lorraine
Carnegie Moscow Center, common.topic.subjects, Caucasus
Europe, common.topic.subject_of, Carnegie Moscow Center
Franz Kafka's Noble Nighmares and Reasons, book.written_work.subjects, Prague
Eastern Front, base.culturalevent.event.entity_involved, Austria-Hungary
Central Europe, location.location.events, Kerensky Offensive
Central Asia, common.topic.subject_of, Carnegie Moscow Center
Eastern Europe, common.topic.webpage, m.09ysrxm
Sam Borenstein, people.person.place_of_birth, Eastern Europe
Peremyotnoye, location.location.containedby, Eastern Europe
Eastern Europe, location.location.contains, Oral
Country, media_common.quotation_subject.quotations_about_this_subject, The greatness of a nation can be judged by the way its animals are treated.
Eastern Front, base.culturalevent.event.entity_involved, Kingdom of Bulgaria

Answer: Bulgaria