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 eastern European country was Ivaylo Zahariev born in? 
Knowledge Triplets: Eastern Europe, location.location.partiallycontains, m.0wg91_v
Eastern Europe, location.location.contains, Crimea
Nikolay Mordvinov, people.person.place_of_birth, Russian Empire
Eastern Front, base.culturalevent.event.entity_involved, Kingdom of Bulgaria
Russia, base.locations.countries.continent, Europe
Hungarian invasions of Europe, time.event.locations, Balkans
m.0wg9209, location.partial_containment_relationship.partially_contained_by, Eastern Europe
Ukraine, location.location.partially_containedby, Central Europe
Eastern Europe, location.location.partiallycontains, m.0wg91_c
Sviatoslav I of Kiev, people.person.place_of_birth, Kiev
Akzhaik District, location.location.partially_containedby, Eastern Europe
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Berengar I of Italy, Holy Roman Emperor
Kaztal District, location.location.containedby, Eastern Europe
Asia, common.topic.subject_of, Carnegie Moscow Center
Pyotr Rumyantsev, people.person.gender, Male
m.04z4k94, people.place_lived.location, Eastern Europe
Romania, location.location.containedby, Eurasia
Zhanakala District, location.location.containedby, Eastern Europe
Russia, location.location.partially_containedby, Europe
West Kazakhstan Region, location.location.people_born_here, g.121kx0yn
Eastern European anti-Communist insurgencies, base.culturalevent.event.entity_involved, Eastern Bloc
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, East Francia
Eastern Europe, location.location.events, Great Patriotic War
Battle of Zadwórze, base.culturalevent.event.entity_involved, Russian Soviet Federative Socialist Republic
Eastern Europe, location.location.contains, Belarusian Central Council
Revolution In Eastern Europe, freebase.valuenotation.has_value, End date
Second Polish Republic, location.location.people_born_here, g.1239jqh4
Bulgaria, location.location.containedby, Eastern Europe
Eastern Europe, location.location.contains, Caucasus
Belgrade, location.location.containedby, Europe
Ivazzade Halil Pasha, people.person.place_of_birth, Ottoman Empire
Eastern Europe, location.location.events, Hungarian invasions of Europe
Russo-Turkish War, time.event.locations, Eastern Europe
Eastern Europe, common.topic.notable_types, Location
Jonathan Kaufman, book.author.works_written, A Hole in the Heart of the World: Being Jewish in Eastern Europe
Balkans, location.location.containedby, Europe
Europe, base.locations.continents.countries_within, Belarus
Eastern Europe, common.topic.webpage, m.09y0w8l
Northern Europe, location.location.containedby, Europe
Eastern Europe, location.location.contains, Second Polish Republic
m.0wg91_v, location.partial_containment_relationship.partially_contained_by, Eastern Europe
Eastern Front, base.culturalevent.event.entity_involved, Grand Duke Nicholas Nikolaevich of Russia
Caucasus, location.location.people_born_here, Nakşidil Sultan
Revolution In Eastern Europe, freebase.valuenotation.has_value, People involved
Kingdom of Romania, location.location.containedby, Eastern Europe
Kingdom of Romania, location.location.people_born_here, Gheorghe Derussi
Hungarian invasions of Europe, time.event.locations, Western Europe
Oral, location.location.people_born_here, Zakhar Bron
Alexander Suvorov, people.person.place_of_birth, Moscow
West Kazakhstan Region, location.location.people_born_here, g.119pgd4xv
Isatay District, location.location.containedby, Eastern Europe
Caucasus, location.location.people_born_here, Şemsiruhsar Hatun
Eastern Europe, location.location.contains, Moldova
m.0wg91__, location.partial_containment_relationship.partially_contained_by, Eastern Europe
Eastern Europe, location.location.contains, Zhanybek District
Eastern Europe, location.location.contains_major_portion_of, Zelenov District
Alexander Danilovich Menshikov, people.person.nationality, Russia
A Hole in the Heart of the World: Being Jewish in Eastern Europe, common.topic.notable_types, Book
Eastern Europe, common.topic.webpage, m.09x5w5d
Eastern Europe, common.topic.subject_of, Carnegie Moscow Center
Atyrau, location.location.partially_containedby, Eastern Europe
Europe, base.locations.continents.countries_within, Moldova
United Kingdom, location.location.containedby, Western Europe
Tokhtamysh–Timur war, time.event.locations, Eastern Europe
Eastern Europe, location.location.containedby, Europe
Eastern Europe, common.topic.webpage, m.09xplj_
Eastern Europe, location.location.partially_contains, Terekti District
Eastern Europe, location.location.events, Great Northern War
Eastern Europe, location.location.contains, Bulgaria
West Kazakhstan Region, location.location.people_born_here, g.1212mg4s
Northern Europe, common.topic.image, m.02bk_9p
Vasili Bebutov, people.person.nationality, Russia
Crimea, location.location.containedby, Eastern Europe
Second Polish Republic, location.location.people_born_here, Syamyon Sharetski
Eastern European anti-Communist insurgencies, common.topic.notable_for, g.1255l1vcg
Central and Eastern Europe, location.location.containedby, Europe
North Caucasus, location.location.people_born_here, Kamures Kadınefendi
Ivane Andronikashvili, people.person.nationality, Russia
Alexander Suvorov, people.person.nationality, Russia
Zelenov District, location.location.primarily_containedby, Eastern Europe
Alexandru Averescu, people.person.nationality, Romania
Eastern Europe, location.location.contains_major_portion_of, Ukraine
Donat Makijonek, people.person.place_of_birth, Russian Empire
Eastern Europe, location.location.people_born_here, Sam Borenstein
Eastern Europe, location.location.contains, Prut
Gulnafis Aitmukhambetova, people.person.nationality, Kazakhstan
Caucasus, location.location.people_born_here, Peyvesti Osman Haseki Kadın Efendi
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, West Francia
Polish–Swedish War, time.event.locations, Eastern Europe
m.09wst1h, common.webpage.topic, Eastern Europe
Zhanybek District, location.location.containedby, Eastern Europe
Caucasus, location.location.people_born_here, Bezmiâlem Sultan
Eastern Europe, location.location.partially_contains, Inder District
m.09y0w8l, common.webpage.topic, Eastern Europe
Terekti District, location.location.partially_containedby, Eastern Europe
Eastern Europe, location.location.partiallycontains, m.0wg91_j
West Kazakhstan Region, location.location.partially_containedby, Eastern Europe
Eastern Europe, organization.organization_scope.organizations_with_this_scope, Exclaimer
Central Europe, common.topic.notable_types, Region
Eastern Europe, location.location.contains, Romania
Western Europe, organization.organization_scope.organizations_with_this_scope, Exclaimer
Caucasus, location.location.people_born_here, Vasilis Tsimbidis
Europe (UN divisions Eastern, East Central and Southeastern Europe), common.image.appears_in_topic_gallery, Eastern Europe
Sviatoslav I of Kiev, people.person.parents, Igor of Kiev
Caucasus, location.location.people_born_here, Rina Marsa
West Kazakhstan Region, location.location.people_born_here, g.15dpywjw
Grand Duke Nicholas Nikolaevich of Russia, people.person.nationality, Russia
Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998, common.topic.article, m.075xffj
Northern Europe, location.location.contains, Swedish Empire
Eastern Europe, location.location.events, Russo-Turkish War
Revolution In Eastern Europe, common.topic.notable_types, Award-Winning Work
m.09x1bwr, common.webpage.topic, Eastern Europe
Austro-Turkish War, time.event.locations, Eastern Europe
North Caucasus, common.topic.article, m.02fswg
Belarus, location.location.containedby, Europe
Russia, location.location.containedby, Eurasia
Eastern Europe, common.topic.webpage, m.09xyt2j
Eastern Europe, common.topic.webpage, m.0b464l5
Alexander Dutov, people.person.nationality, Russia
Eastern Europe, location.location.contains, Taskala District
Ivazzade Halil Pasha, people.person.gender, Male
Eastern Front, time.event.locations, Central Europe
Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998, book.written_work.subjects, Eastern Europe
Central Europe, common.topic.subject_of, Carnegie Moscow Center
Second Polish Republic, location.location.people_born_here, Bogusław Lustyk
A Hole in the Heart of the World: Being Jewish in Eastern Europe, book.book.genre, Non-fiction
Sviatoslav I of Kiev, people.person.children, Vladimir the Great
West Kazakhstan Region, location.location.people_born_here, g.121r_bsp
Eastern Europe, common.topic.image, Location-Europe-UNsubregions, Kosovo as part of Serbia
Eastern Europe, location.location.partially_contains, West Kazakhstan Region
Eastern Europe, location.location.partiallycontains, m.0wg9204
Sviatoslav I of Kiev, people.person.parents, Olga of Kiev
Oral, location.location.containedby, Eastern Europe
Second Polish Republic, location.location.containedby, Eastern Europe
Caucasus, location.location.people_born_here, Alime Sultan
Jewish people, book.book_subject.works, A Hole in the Heart of the World: Being Jewish in Eastern Europe
Eastern Europe, base.schemastaging.context_name.pronunciation, g.125_llnl3
Exclaimer, organization.organization.geographic_scope, Central Europe
Ukraine, base.locations.countries.continent, Europe
Central and Eastern Europe, common.topic.notable_types, Region
Eastern European anti-Communist insurgencies, base.culturalevent.event.entity_involved, Ukrainian Insurgent Army
Eastern Europe, location.location.partially_contains, Kazakhstan
Prut, location.location.containedby, Eastern Europe
Location-Europe-UNsubregions, Kosovo as part of Serbia, common.image.appears_in_topic_gallery, Eastern Europe
West Kazakhstan Region, location.location.people_born_here, g.15dqh4yc
Kingdom of Romania, location.location.people_born_here, Alexandru Săvulescu
Revolution In Eastern Europe, award.award_winning_work.awards_won, m.0105ybrn
Eastern Europe, common.topic.notable_for, g.1258n9r3m
Vladimir the Great, people.person.parents, Sviatoslav I of Kiev
A Hole in the Heart of the World: Being Jewish in Eastern Europe, book.written_work.subjects, Jewish people
Stanisław Szeptycki, people.person.place_of_birth, Austria-Hungary
Eastern Europe, location.location.contains, Galicia
m.0wg91_j, location.partial_containment_relationship.partially_contained_by, Eastern Europe
Eastern Europe, book.book_subject.works, A Hole in the Heart of the World: Being Jewish in Eastern Europe
Timur Bekmambetov, people.person.nationality, Russia
Eastern Europe, location.location.partiallycontains, m.0wg91_p
Hungarian invasions of Europe, common.topic.article, m.0h3r7n2
Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998, book.written_work.subjects, Foreign aid
Socialist Federal Republic of Yugoslavia, location.location.containedby, Balkans
North Caucasus, location.location.contains, Abkhazia
Eastern Europe, common.topic.webpage, m.09ysrxm
Caucasus, location.location.people_born_here, Biydâr Kadin Efendi
Pyotr Rumyantsev, people.person.nationality, Russia
Western Europe, common.topic.image, m.02bk_9p
Second Polish Republic, location.location.people_born_here, g.120ldzk5
Revolution In Eastern Europe, time.event.included_in_event, Revolutions of 1989
Kingdom of Romania, location.location.people_born_here, Varduhi Varderesyan
Great Patriotic War, time.event.locations, Eastern Europe
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
Inder District, location.location.partially_containedby, Eastern Europe
Eastern European anti-Communist insurgencies, base.culturalevent.event.entity_involved, Hungarian Revolution of 1956
Europe, location.location.partially_contains, Soviet Union
Eastern Europe, common.topic.webpage, m.09x6gcq
Belarusian Central Council, location.location.containedby, Northern Europe
Aleksei Brusilov, people.person.nationality, Russia
Location-Europe-UNsubregions, Kosovo as part of Serbia, common.image.appears_in_topic_gallery, Northwestern Europe
Michał Rola-Żymierski, people.person.place_of_birth, Austria-Hungary
Vasilis Tsimbidis, people.person.place_of_birth, Caucasus
Western Europe, location.location.contains, United Kingdom
Great Northern War, time.event.locations, Eastern Europe
West Kazakhstan Region, location.location.people_born_here, Byrganym Aitimova
Eastern European anti-Communist insurgencies, base.culturalevent.event.entity_involved, Cursed soldiers
Eastern Europe, location.location.events, Ukrainian War of Independence
Balkans, location.location.contains, Socialist Federal Republic of Yugoslavia
Eastern Europe, location.location.contains, Kaztal District
m.0105ybrn, award.award_honor.honored_for, Revolution In Eastern Europe
North Caucasus, location.location.containedby, Eastern Europe
Central Europe, location.location.containedby, Europe
Eastern Europe, common.topic.webpage, m.09wgvm6
Sam Borenstein, people.person.place_of_birth, Eastern Europe
Moldova, location.location.containedby, Eastern Europe
Eastern Europe, location.location.contains, Kievan Rus'
West Kazakhstan Region, location.location.partially_containedby, Central Asia
m.0wg91_p, location.partial_containment_relationship.partially_contained_by, Eastern Europe
Tsardom of Russia, location.location.people_born_here, Boris Sheremetev
Franciszek Kleeberg, people.person.place_of_birth, Austria-Hungary
Eastern Europe, common.topic.webpage, m.09wst1h
m.09x6gcq, common.webpage.topic, Eastern Europe
Central Europe, location.location.contains, Great Moravia
West Kazakhstan Region, location.location.people_born_here, g.1ylhlcgg0
Kingdom of Romania, location.location.people_born_here, g.122kznjh
Kazakhstan, base.locations.countries.continent, Asia
m.09klpb1, base.ontologies.ontology_instance_mapping.freebase_topic, Eastern Europe
Eastern Europe, location.location.events, Austro-Turkish War
Carnegie Moscow Center, common.topic.subjects, Eurasia
Grand Duchy of Lithuania, location.location.containedby, Eastern Europe
m.09xyt2j, common.webpage.topic, Eastern Europe
Eastern Europe, location.location.partially_contains, Akzhaik District
North Caucasus, location.location.containedby, Caucasus
Bezmiâlem Sultan, people.person.place_of_birth, Caucasus
A Hole in the Heart of the World: Being Jewish in Eastern Europe, book.written_work.author, Jonathan Kaufman
North Caucasus, location.location.people_born_here, Cevherriz Hanımefendi
Eastern Europe, book.book_subject.works, Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998
Caucasus, location.location.people_born_here, Mahmut Nedim Hendek
Kingdom of Romania, location.location.people_born_here, Titus Munteanu
Kingdom of Romania, location.location.people_born_here, Simion Bughici
Caucasus, location.location.people_born_here, Menander I
Central Europe, location.location.events, Eastern Front
Kingdom of Romania, location.location.people_born_here, Marina Krilovici
Pyotr Rumyantsev, people.person.place_of_birth, Moscow
Belarusian People's Republic, location.location.containedby, Eastern Europe
Hungarian invasions of Europe, common.topic.notable_for, g.1259ycvy0
m.09y405k, common.webpage.topic, Eastern Europe
m.0wg91_c, location.partial_containment_relationship.partially_contained_by, Eastern Europe
First Jassy–Kishinev Offensive, base.culturalevent.event.entity_involved, Kingdom of Romania
Eastern Europe, common.topic.webpage, m.09x1bwr
Tamerlan Tsarnaev, people.person.place_of_birth, North Caucasus
North Caucasus, common.topic.image, Chechnya and Caucasus
Eastern Europe, location.location.contains, Isatay District
Russian Soviet Federative Socialist Republic, location.location.containedby, Soviet Union
Romania, location.location.events, Jassy–Kishinev Offensive
North Caucasus, location.location.people_born_here, Navekivisal Hanımefendi
North Caucasus, location.location.people_born_here, Reftarıdil Kadınefendi
Bulgaria, base.locations.countries.continent, Europe
Eastern Europe, location.location.contains, Rus'
West Kazakhstan Region, location.location.people_born_here, g.11ksgrplg
Exclaimer, organization.organization.geographic_scope, Northern Europe
Eastern European anti-Communist insurgencies, time.event.locations, Soviet Union
Revolution In Eastern Europe, freebase.valuenotation.has_no_value, Instance of recurring event
Russian Soviet Federative Socialist Republic, common.topic.notable_types, Country
Central Europe, location.location.events, Ukrainian War of Independence
Abzal Azhgaliyev, people.person.nationality, Kazakhstan
North Caucasus, location.location.people_born_here, Kamures Kadın Efendi
Kievan Rus', location.country.official_language, Old East Slavic
Moscow, location.location.containedby, Europe
Kingdom of Romania, location.location.people_born_here, g.122h71rp
Hungarian invasions of Europe, time.event.locations, Eastern Europe
Europe, location.location.partially_contains, Russia
Revolutions of 1989, time.event.includes_event, Revolution In Eastern Europe
A Hole in the Heart of the World: Being Jewish in Eastern Europe, common.topic.notable_for, g.12558wp6w
Eastern Europe, location.location.contains, Peremyotnoye
Kingdom of Romania, location.location.people_born_here, Lili Pancu
Russian Empire, location.location.partially_containedby, Europe
Kazakhstan, location.location.partially_containedby, Europe
Old East Slavic, language.human_language.main_country, Kievan Rus'
Eastern Europe, common.topic.webpage, m.09xf_cx
m.09wgvm6, common.webpage.topic, Eastern Europe
Romania, base.locations.countries.continent, Europe
Mihailo Olćan, military.military_person.participated_in_conflicts, Eastern Front
Northern Europe, location.location.contains, German Empire
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Kingdom of Italy
Olga of Kiev, people.person.nationality, Russia
Socialist Federal Republic of Yugoslavia, location.location.containedby, Central and Eastern Europe
Eastern Europe, location.location.partiallycontains, m.0wg91__
Eastern Europe, location.location.contains, Southern Carpathians
Eastern Europe, common.topic.webpage, m.09xgv8w
m.02bk_9p, common.image.appears_in_topic_gallery, Northern Europe
Eastern Europe, location.location.events, Eastern European anti-Communist insurgencies
Eastern Europe, common.topic.image, m.02bk_9p
Bokey Orda District, location.location.containedby, Eastern Europe
Eastern Europe, location.location.contains, Oral
Eastern Front, base.culturalevent.event.entity_involved, Austria-Hungary
Bulgaria, location.location.containedby, Europe
Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998, common.topic.notable_for, g.125fj_w9c
Soviet Union, location.location.partially_containedby, Europe
Caucasus, location.location.people_born_here, Murat Toptani
Carnegie Moscow Center, common.topic.subjects, Eastern Europe
West Kazakhstan Region, location.location.people_born_here, g.1230jzgq
Eastern Europe, location.location.contains, Kresy
Revolution In Eastern Europe, freebase.valuenotation.is_reviewed, Location(s)
Galicia, location.location.containedby, Eastern Europe
Europe, base.locations.continents.countries_within, Russia
Romania, location.location.containedby, Eastern Europe
Vena Kava, people.person.place_of_birth, Eastern Europe
Europe, base.locations.continents.countries_within, Romania
North Caucasus, location.location.people_born_here, Tamerlan Tsarnaev
Biydâr Kadin Efendi, people.person.place_of_birth, Caucasus
Caucasus, location.location.people_born_here, Jamal Nur Kadinefendi
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, First Bulgarian Empire
Revolution In Eastern Europe, freebase.valuenotation.has_value, Start date
Central Asia, common.topic.subject_of, Carnegie Moscow Center
Jassy–Kishinev Offensive, base.culturalevent.event.entity_involved, Kingdom of Romania
Moldova, location.location.containedby, Europe
Europe, base.locations.continents.countries_within, Ukraine
Soviet Union, location.location.events, Eastern European anti-Communist insurgencies
Revolution In Eastern Europe, time.event.locations, Eastern Europe
Eastern Europe, location.location.partiallycontains, m.0wg9209
Central Europe, location.location.events, Great Patriotic War
Georgia, location.location.containedby, Eastern Europe
Revolution In Eastern Europe, common.topic.notable_for, g.1q56fr7j6
Eastern Front, time.event.locations, Eastern Europe
m.0wg9204, location.partial_containment_relationship.partially_contained_by, Eastern Europe
Nicholas II of Russia, people.person.nationality, Russian Empire
North Caucasus, location.location.events, Persian Expedition of 1796
Eurasia, common.topic.subject_of, Carnegie Moscow Center
Socialist Federal Republic of Yugoslavia, location.location.containedby, Eastern Europe
Exclaimer, organization.organization.geographic_scope, Eastern Europe
Western Europe, location.location.containedby, Europe
Eastern Europe, location.location.people_born_here, Vena Kava
m.02bk_9p, common.image.appears_in_topic_gallery, Western Europe
Eastern Front, base.culturalevent.event.entity_involved, Stefan Toshev
Belarus, base.locations.countries.continent, Europe
Eastern Front, base.culturalevent.event.entity_involved, Nicholas II of Russia
Europe, location.location.partially_contains, Kazakhstan
Eastern Europe, common.topic.webpage, m.09x_z_s
Eastern Europe, location.location.contains, Belarusian People's Republic
Kurmangazy District, location.location.containedby, Eastern Europe
Russian Soviet Federative Socialist Republic, location.country.capital, Moscow
Caucasus, location.location.people_born_here, Mihrişah Valide Sultan
m.09x_z_s, common.webpage.topic, Eastern Europe
Europe, location.location.partially_contains, Russian Empire
Europe (UN divisions Eastern, East Central and Southeastern Europe), common.image.size, m.02dv17n
Eastern Europe, location.location.partially_contains, Atyrau
Kievan Rus', location.location.containedby, Eastern Europe
Europe, common.topic.subject_of, Carnegie Moscow Center
Pyotr Rumyantsev, people.deceased_person.place_of_death, Russian Empire
Eastern Europe, location.location.events, Austro-Russian–Turkish War
Taskala District, location.location.containedby, Eastern Europe
Second Polish Republic, location.location.people_born_here, Yitzhak Arad
Eastern European anti-Communist insurgencies, common.topic.notable_types, Military Conflict
Rus', location.location.containedby, Eastern Europe
Austro-Russian–Turkish War, time.event.locations, Eastern Europe
Central Europe, location.location.events, Kerensky Offensive
North Caucasus, location.location.contains, Chechen Republic of Ichkeria
Northwestern Europe, common.topic.image, m.02bk_9p
Balkans, location.location.events, Hungarian invasions of Europe
m.09xplj_, common.webpage.topic, Eastern Europe
Eastern European anti-Communist insurgencies, common.topic.article, m.0gls5gc
Soviet Union, location.country.capital, Moscow
Eastern Europe, location.location.containedby, Bulgaria
Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998, book.book.genre, Non-fiction
Balkans, location.location.events, Austro-Russian–Turkish War
Northwestern Europe, common.topic.notable_types, Location
m.09xgv8w, common.webpage.topic, Eastern Europe
Kingdom of Romania, location.location.people_born_here, Ion G. Duca
North Caucasus, location.location.events, g.122k1123
Caucasus, location.location.people_born_here, Hümaşah Sultan
Frederick IV of Denmark, people.person.gender, Male
Ukraine, location.location.containedby, Europe
Central and Eastern Europe, location.location.contains, Socialist Federal Republic of Yugoslavia
Yelena Drapeko, people.person.nationality, Russia
Central Europe, location.location.partially_contains, Ukraine
Eastern Europe, location.location.contains, Kingdom of Romania
West Kazakhstan Region, location.location.people_born_here, g.1237749v
Eastern Front, time.event.includes_event, Russian invasion of East Prussia
Eastern Front, common.topic.image, Russian prisoners tannenberg
Eastern Europe, location.location.events, Polish–Soviet War
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
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
Kingdom of Romania, location.location.events, First Jassy–Kishinev Offensive
m.0wg91_6, location.partial_containment_relationship.partially_contained_by, Eastern Europe
Location-Europe-UNsubregions, Kosovo as part of Serbia, common.image.size, m.029jz6y
m.09x5w5d, common.webpage.topic, Eastern Europe
Kingdom of Romania, location.location.people_born_here, Avraham Yosef Shapira
Byrganym Aitimova, people.person.place_of_birth, West Kazakhstan Region
Eastern Europe, location.location.events, Tokhtamysh–Timur war
Western Europe, location.location.events, Hungarian invasions of Europe
m.0b464l5, common.webpage.topic, Eastern Europe
Eastern Europe, common.topic.webpage, m.09y405k
Alexander Danilovich Menshikov, people.person.place_of_birth, Moscow
North Caucasus, common.topic.notable_for, g.1255l0dnw
Eastern Europe, base.ontologies.ontology_instance.equivalent_instances, m.09klpb1
Eastern Europe, common.topic.article, m.09b6m
Ukrainian War of Independence, time.event.locations, Eastern Europe
Caucasus, location.location.containedby, Eastern Europe
Central Europe, location.location.contains, Second Polish Republic
m.09xf_cx, common.webpage.topic, Eastern Europe
Northern Europe, common.topic.notable_types, Location
Atyrau Region, location.location.partially_containedby, Eastern Europe
North Caucasus, location.location.people_born_here, Düzd-i Dil Kadın Efendi
Eastern European anti-Communist insurgencies, time.event.locations, Eastern Europe
Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998, book.written_work.author, Janine R. Wedel
Southern Carpathians, location.location.containedby, Eastern Europe
Peremyotnoye, location.location.containedby, Eastern Europe
North Caucasus, location.location.people_born_here, Remişnaz Hanımefendi
Moldova, base.locations.countries.continent, Europe
East Pomeranian Offensive, base.culturalevent.event.entity_involved, Soviet Union
Eastern Europe, location.location.contains, Zhanakala District
Ukraine, location.location.primarily_containedby, Eastern Europe
Romania, location.location.events, First Jassy–Kishinev Offensive
Eastern Europe, location.location.partially_contains, Makhambet District
Eastern Europe, location.location.events, Polish–Swedish War
Sviatoslav I of Kiev, people.person.nationality, Ukraine
Second Polish Republic, location.location.people_born_here, g.121f4bvq
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Middle Francia
Eastern Europe, location.location.contains, North Caucasus
Northern Europe, location.location.contains, Belarusian Central Council
Northwestern Europe, common.topic.image, Location-Europe-UNsubregions, Kosovo as part of Serbia
Romania, location.location.containedby, Europe
Exclaimer, organization.organization.geographic_scope, Western Europe
Eastern European anti-Communist insurgencies, base.culturalevent.event.entity_involved, Forest Brothers
Kazakhstan, location.location.partially_containedby, Eastern Europe
m.09ysrxm, common.webpage.topic, Eastern Europe
Caucasus, common.topic.subject_of, Carnegie Moscow Center
Kresy, location.location.containedby, Eastern Europe
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Louis the Child
A Hole in the Heart of the World: Being Jewish in Eastern Europe, common.topic.article, m.0703wwt
Eastern Europe, location.location.contains, Georgia
Eastern Europe, location.location.events, Revolution In Eastern Europe
Belarusian People's Republic, location.country.capital, Prague
Collision and Collusion: The Strange Case of Western Aid to Eastern Europe, 1989-1998, common.topic.notable_types, Book
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Taksony of Hungary
Eastern European anti-Communist insurgencies, base.culturalevent.event.entity_involved, Romanian anti-communist resistance movement
Eastern Europe, location.location.contains, Grand Duchy of Lithuania
North Caucasus, common.topic.image, RussiaNorthernCaucasus
Second Polish Republic, location.location.containedby, Central Europe
Eastern Europe, location.location.contains, Socialist Federal Republic of Yugoslavia
Eastern Europe, location.location.contains, Kurmangazy District
Eastern Europe, common.topic.image, Europe (UN divisions Eastern, East Central and Southeastern Europe)
Country, common.topic.notable_types, Bulgaria
Ivan Krasnov, people.person.place_of_birth, Russian Empire
Central Europe, location.location.events, Polish–Soviet War
North Caucasus, location.location.contains, Adygea
Polish–Soviet War, time.event.locations, Eastern Europe
Makhambet District, location.location.partially_containedby, Eastern Europe
Eastern Europe, location.location.partiallycontains, m.0wg91_6
Hungarian invasions of Europe, base.culturalevent.event.entity_involved, Magyar tribes
Eastern Europe, location.location.events, Eastern Front
Eastern Europe, location.location.partially_contains, Atyrau Region
m.02bk_9p, common.image.appears_in_topic_gallery, Eastern Europe
Europe, location.location.partially_contains, Georgia
Carnegie Moscow Center, common.topic.subjects, Central Europe
Eastern Europe, location.location.contains, Bokey Orda District
Belarusian Central Council, location.location.containedby, Eastern Europe
Second Polish Republic, location.location.containedby, Europe
Włodzimierz Zagórski, people.person.place_of_birth, Galicia
Europe, base.locations.continents.countries_within, Bulgaria
Caucasus, location.location.people_born_here, Neshedil Kadinefendi
Galicia, location.location.people_born_here, Włodzimierz Zagórski
Hungarian invasions of Europe, common.topic.image, Kalandozasok
Nurbol Zhumaskaliyev, people.person.nationality, Soviet Union
Country, common.topic.image, Europe topography map
Central Europe, location.location.events, Galicia–Volhynia Wars
Caucasus, location.location.people_born_here, Bidar Kadınefendi
West Kazakhstan Region, location.location.people_born_here, g.1hh_qz741
A Hole in the Heart of the World: Being Jewish in Eastern Europe, book.written_work.subjects, Eastern Europe
North Caucasus, location.location.people_born_here, Yıldız Hanımefendi
Alexander Kerensky, people.person.nationality, Russia

Answer: Bulgaria