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 government did the roman empire have? 
Knowledge Triplets: The History of the Decline and Fall of the Roman Empire: Vol. 6, book.book.editions, The History of the Decline and Fall of the Roman Empire: Vol. 6
The History of the Decline and Fall of the Roman Empire: Vol. 2, common.topic.article, m.06wf42n
Edward Gibbon, book.author.series_written_or_contributed_to, The History of the Decline and Fall of the Roman Empire
Roman Senate, government.governmental_body.members, m.0w_k7yp
Roman Empire, government.form_of_government.countries, Autocracy
The Roman Empire and Its Germanic Peoples, book.book.editions, The Roman Empire and Its Germanic Peoples
Constantine the Great, people.person.nationality, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 2, book.written_work.author, Edward Gibbon
m.0ws8w7_, location.partial_containment_relationship.partially_contains, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 4, book.written_work.previous_in_series, The History of the Decline and Fall of the Roman Empire: Vol. 3
Cantabrian Wars, base.culturalevent.event.entity_involved, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 7, common.topic.article, m.06wffb9
Roman Empire, military.military_combatant.military_conflicts, m.04yvlvy
The History of the Decline and Fall of the Roman Empire: Vol. 4, book.written_work.part_of_series, The History of the Decline and Fall of the Roman Empire
m.0w_k7yp, government.government_position_held.jurisdiction_of_office, Roman Empire
m.04y_8_s, military.military_combatant_group.combatants, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.07ssb0k
Roman Empire, military.military_combatant.force_deployments, m.0b7hjs5
Roman Empire, book.book_subject.works, The Roman Empire and Its Germanic Peoples
The History of the Decline and Fall of the Roman Empire: Vol. 1, common.topic.notable_for, g.1256c6b48
Roman Empire, military.military_combatant.military_conflicts, m.0t5qtbp
Roman Empire, location.country.capital, Rome
The History of the Decline and Fall of the Roman Empire: Vol. 5, book.written_work.next_in_series, The History of the Decline and Fall of the Roman Empire: Vol. 6
Roman Empire, military.military_combatant.military_conflicts, m.04yynwh
The History of the Decline and Fall of the Roman Empire: Vol. 5, book.written_work.subjects, Decline of the Roman Empire
Roman Empire, book.book_subject.works, The History of the Decline and Fall of the Roman Empire: Vol. 5
The History of the Decline and Fall of the Roman Empire: Vol. 3, book.written_work.subjects, Roman Empire
Roman Empire, government.governmental_jurisdiction.governing_officials, m.0w_k7yp
The History of the Decline and Fall of the Roman Empire: Vol. 6, book.written_work.subjects, Decline of the Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yynj8
The History of the Decline and Fall of the Roman Empire: Vol. 7, common.topic.notable_types, Book
The History of the Decline and Fall of the Roman Empire: Vol. 3, book.written_work.part_of_series, The History of the Decline and Fall of the Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yypjc
m.05nxjh8, military.military_combatant_group.combatants, Roman Empire
m.0wzb909, military.military_command.military_combatant, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 6, book.written_work.previous_in_series, The History of the Decline and Fall of the Roman Empire: Vol. 5
Roman Empire, book.book_subject.works, The History of the Decline and Fall of the Roman Empire: Vol. 6
Roman Empire, book.book_subject.works, The History of the Decline and Fall of the Roman Empire: Vol. 3
Marcomannic Wars, base.culturalevent.event.entity_involved, Roman Empire
Roman Empire, location.location.geolocation, m.0wmrmtf
The Roman Empire and Its Germanic Peoples, book.translated_work.translations, The Roman Empire and Its Germanic Peoples
The History of the Decline and Fall of the Roman Empire: Vol. 7, book.written_work.subjects, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 4, book.written_work.next_in_series, The History of the Decline and Fall of the Roman Empire: Vol. 5
m.07nfqr2, base.ontologies.ontology_instance_mapping.freebase_topic, Roman Empire
The Roman Empire and Its Germanic Peoples, common.topic.notable_for, g.125byq35r
The History of the Decline and Fall of the Roman Empire: Vol. 6, common.topic.notable_types, Book
m.0fs8d74, military.military_combatant_group.combatants, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04z31gb
Roman Empire, military.military_combatant.military_conflicts, m.048zt3v
Roman Empire, military.military_combatant.military_conflicts, m.0fs82dk
Great Conspiracy, base.culturalevent.event.entity_involved, Roman Empire
Roman Empire, location.location.contains, Cilicia
Roman Empire, location.country.capital, Ravenna
Roman Empire, military.military_combatant.military_conflicts, m.04yynbg
The History of the Decline and Fall of the Roman Empire: Vol. 1, book.written_work.next_in_series, The History of the Decline and Fall of the Roman Empire: Vol. 2
The History of the Decline and Fall of the Roman Empire: Vol. 4, book.book.editions, The History of the Decline and Fall of the Roman Empire: Vol. 4
The History of the Decline and Fall of the Roman Empire: Vol. 7, book.written_work.previous_in_series, The History of the Decline and Fall of the Roman Empire: Vol. 6
The History of the Decline and Fall of the Roman Empire: Vol. 1, book.book.editions, The History of the Decline and Fall of the Roman Empire: Vol. 1
Roman Empire, common.topic.image, RomanEmpire large
Roman Empire, location.location.contains, g.120phpf9
Roman Empire, military.military_combatant.military_commanders, m.048zt46
Roman Empire, location.location.people_born_here, g.121p62yj
Roman Empire, location.location.people_born_here, Alexius of Rome
Roman Empire, military.military_combatant.military_conflicts, m.04yypjj
The Roman Empire and Its Germanic Peoples, common.topic.article, m.06n3l2k
The History of the Decline and Fall of the Roman Empire: Vol. 2, book.written_work.next_in_series, The History of the Decline and Fall of the Roman Empire: Vol. 3
Roman Empire, location.statistical_region.population, m.0ngxd03
Roman Empire, military.military_combatant.military_conflicts, m.04yyp3_
The History of the Decline and Fall of the Roman Empire: Vol. 5, common.topic.notable_for, g.1256r8_4g
m.0b7hhs4, military.military_command.military_combatant, Roman Empire
Roman Empire, book.book_subject.works, Memoirs of Hadrian
Edward Gibbon, book.author.works_written, The History of the Decline and Fall of the Roman Empire: Vol. 2
The History of the Decline and Fall of the Roman Empire: Vol. 3, book.written_work.subjects, Decline of the Roman Empire
Roman Empire, location.location.people_born_here, Eunomius of Cyzicus
Roman Empire, location.location.contains, Scythopolis
Roman Empire, military.military_combatant.military_conflicts, m.04y_7j9
m.0fs82dk, military.military_combatant_group.combatants, Roman Empire
Cilicia, common.topic.image, Roman Empire 125
Roman Empire, military.military_combatant.military_conflicts, m.04z212s
The History of the Decline and Fall of the Roman Empire: Vol. 1, book.written_work.subjects, Decline of the Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yv0k1
The Roman Empire and Its Germanic Peoples, book.book.editions, The Roman Empire and its Germanic peoples
The History of the Decline and Fall of the Roman Empire: Vol. 3, book.written_work.next_in_series, The History of the Decline and Fall of the Roman Empire: Vol. 4
The History of the Decline and Fall of the Roman Empire: Vol. 3, common.topic.article, m.06wf5mz
m.048zt8g, military.military_combatant_group.combatants, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 7, book.written_work.subjects, Decline of the Roman Empire
m.04z74kq, military.military_combatant_group.combatants, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 6, common.topic.notable_for, g.125bd49gz
Roman Empire, military.military_combatant.military_conflicts, m.04yypd1
Edward Gibbon, book.author.works_written, The History of the Decline and Fall of the Roman Empire: Vol. 4
Roman Empire, common.topic.image, m.0291myr
Roman Empire, military.military_combatant.military_conflicts, m.048zt8g
Autocracy, government.form_of_government.countries, Roman Empire
Roman Empire, location.location.partially_contained_by, m.0ws8w38
Edward Gibbon, book.author.works_written, The History of the Decline and Fall of the Roman Empire: Vol. 3
The History of the Decline and Fall of the Roman Empire: Vol. 1, book.written_work.part_of_series, The History of the Decline and Fall of the Roman Empire
Jewish–Roman wars, base.culturalevent.event.entity_involved, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 4, book.written_work.subjects, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yytvg
Roman Empire, military.military_combatant.military_conflicts, m.0b7hgc7
Edward Gibbon, book.author.works_written, The History of the Decline and Fall of the Roman Empire: Vol. 5
The History of the Decline and Fall of the Roman Empire: Vol. 4, book.written_work.author, Edward Gibbon
Roman–Parthian War of 58–63, base.culturalevent.event.entity_involved, Roman Empire
Roman–Persian Wars, base.culturalevent.event.entity_involved, Sasanian Empire
The Roman Empire and Its Germanic Peoples, book.book.genre, Non-fiction
The History of the Decline and Fall of the Roman Empire: Vol. 5, book.written_work.author, Edward Gibbon
Roman Empire, common.topic.notable_types, Country
m.04z4n1f, military.military_combatant_group.combatants, Roman Empire
Siege of Jerusalem, base.culturalevent.event.entity_involved, Roman Empire
Roman Empire, book.book_subject.works, Centurion
Roman Empire, book.book_subject.works, The History of the Decline and Fall of the Roman Empire: Vol. 1
Roman Empire, location.country.official_language, Latin Language
Roman Empire, military.military_combatant.military_conflicts, m.04z0bs7
Roman Empire, location.country.administrative_divisions, Africa Proconsularis
Roman Empire, book.book_subject.works, The Gladiator
The Roman Empire and Its Germanic Peoples, book.written_work.author, Herwig Wolfram
Roman Empire, military.military_combatant.military_conflicts, m.04yynhl
Roman Empire, military.military_combatant.military_conflicts, m.04y_8r5
The History of the Decline and Fall of the Roman Empire: Vol. 6, common.topic.article, m.06wfbgp
RomanEmpire large, common.image.appears_in_topic_gallery, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yyndt
Roman Empire, book.book_subject.works, The Eagle in the Sand
Roman Empire, military.military_combatant.military_conflicts, m.04ytytf
The History of the Decline and Fall of the Roman Empire: Vol. 1, common.topic.article, m.06wdx_3
The History of the Decline and Fall of the Roman Empire: Vol. 4, book.written_work.subjects, Decline of the Roman Empire
Roman Empire, location.location.people_born_here, Demophilus of Constantinople
Roman Empire, military.military_combatant.military_conflicts, m.04yy59k
m.0fs6qvf, military.military_combatant_group.combatants, Roman Empire
Roman Empire, military.military_combatant.military_commanders, m.0b7hhs4
Roman–Parthian War of 161–166, base.culturalevent.event.entity_involved, Roman Empire
Syria, common.topic.image, Roman Empire 125
The History of the Decline and Fall of the Roman Empire: Vol. 2, common.topic.notable_for, g.1255xlhhc
Roman Empire, film.film_subject.films, Gladiator
Roman Empire, fictional_universe.fictional_setting.languages, Greek Language
Roman Empire, book.book_subject.works, The History of the Decline and Fall of the Roman Empire: Vol. 7
Herwig Wolfram, book.author.works_written, The Roman Empire and Its Germanic Peoples
Roman Empire, military.military_combatant.military_conflicts, m.05cbwst
Roman Empire, location.country.capital, Constantinople
m.04z0r7n, military.military_combatant_group.combatants, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yyplz
Roman Empire, military.military_combatant.military_commanders, m.0wzb909
Roman Empire, military.military_combatant.military_conflicts, m.04yz542
The History of the Decline and Fall of the Roman Empire: Vol. 3, book.written_work.previous_in_series, The History of the Decline and Fall of the Roman Empire: Vol. 2
Roman Empire, base.schemastaging.context_name.pronunciation, g.125_qw5d4
Roman Empire, military.military_combatant.military_conflicts, m.04yv1hl
m.0291myr, common.image.appears_in_topic_gallery, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04z4n1f
The History of the Decline and Fall of the Roman Empire: Vol. 1, book.written_work.subjects, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 7, book.book.genre, Non-fiction
The History of the Decline and Fall of the Roman Empire: Vol. 5, book.written_work.subjects, Roman Empire
Roman Empire, royalty.system_of_nobility.titles, m.0gf9wnr
Roman Empire, military.military_combatant.military_conflicts, m.04yvn32
Roman Empire, military.military_combatant.military_conflicts, m.04yzgh6
m.04yx36x, military.military_combatant_group.combatants, Roman Empire
m.04y_8s7, military.military_combatant_group.combatants, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 4, book.book.genre, Non-fiction
Roman Empire, military.military_combatant.military_conflicts, m.04yx1rk
Roman Empire, military.military_combatant.military_conflicts, m.0fs8d74
The History of the Decline and Fall of the Roman Empire: Vol. 3, common.topic.notable_types, Book
Roman Empire, military.military_combatant.military_conflicts, m.04z0r85
m.04yyhqj, military.military_combatant_group.combatants, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 2, book.written_work.subjects, Decline of the Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yyx56
The History of the Decline and Fall of the Roman Empire: Vol. 1, book.written_work.author, Edward Gibbon
Roman Empire 117 AD, common.image.appears_in_topic_gallery, Roman Empire
Roman Empire, book.book_subject.works, The Age of Constantine the Great
Roman Empire, military.military_combatant.military_conflicts, m.04yxbg4
Vespasian, people.person.nationality, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yyp76
Roman Empire, location.location.partially_contained_by, m.0ws8w7_
Roman Empire, book.book_subject.works, The History of the Decline and Fall of the Roman Empire: Vol. 4
The Robe, film.film.subjects, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 7, book.written_work.part_of_series, The History of the Decline and Fall of the Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04y_8_s
Roman Empire, military.military_combatant.military_commanders, m.048zt4f
Roman Empire, military.military_combatant.military_conflicts, m.04y_9f9
Roman Empire, military.military_combatant.military_conflicts, m.04yw_16
The History of the Decline and Fall of the Roman Empire: Vol. 5, book.book.editions, The History of the Decline and Fall of the Roman Empire: Vol. 5
The History of the Decline and Fall of the Roman Empire: Vol. 5, common.topic.notable_types, Book
Roman Empire, military.military_combatant.military_commanders, m.048zt0d
Roman Empire, military.military_combatant.military_conflicts, m.04yyhld
Roman Empire, military.military_combatant.military_conflicts, m.04yyp6x
Roman Empire, location.location.partially_contained_by, m.0ws8wk6
Roman Empire, military.military_combatant.military_conflicts, m.04yx36x
Roman Empire, military.military_combatant.military_conflicts, m.0fs821s
m.048zs__, military.military_command.military_combatant, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04y_9hc
Roman emperor, people.profession.people_with_this_profession, Vespasian
The History of the Decline and Fall of the Roman Empire: Vol. 5, common.topic.article, m.06wf8ks
Roman Empire, military.military_combatant.military_conflicts, m.05prg15
The History of the Decline and Fall of the Roman Empire: Vol. 2, book.written_work.previous_in_series, The History of the Decline and Fall of the Roman Empire: Vol. 1
Roman Empire, location.location.people_born_here, Maximilian
m.0gf9wnr, royalty.system_title_relationship.system, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04z21j3
Roman Empire, military.military_combatant.military_conflicts, m.04yyp4p
m.0ws8w38, location.partial_containment_relationship.partially_contains, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04y_96k
Roman Empire, military.military_combatant.military_conflicts, m.0jmx43y
Roman Empire, military.military_combatant.military_conflicts, m.0fs6qvf
Roman Empire, military.military_combatant.military_conflicts, m.04yyhqj
The History of the Decline and Fall of the Roman Empire: Vol. 6, book.written_work.subjects, Roman Empire
Byzantine Empire, location.country.form_of_government, Autocracy
Roman Empire, military.military_combatant.military_conflicts, m.048zsyf
The History of the Decline and Fall of the Roman Empire: Vol. 5, book.written_work.part_of_series, The History of the Decline and Fall of the Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yyp4d
Roman Empire, base.services.costume_styles.costume_shop, Costumes Empire
m.048zz14, military.military_command.military_combatant, Roman Empire
Roman Empire, military.military_combatant.military_commanders, m.05prg1q
m.04yvzx5, military.military_combatant_group.combatants, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04ywrm8
Roman Empire, common.topic.subject_of, Ephesus
Roman Empire, military.military_combatant.military_commanders, m.048zz14
m.04z74p6, military.military_combatant_group.combatants, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 1, common.topic.notable_types, Book
Roman Empire, location.location.people_born_here, Publius Quinctilius Varus
Ephesus, common.topic.subjects, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 3, book.book.genre, Non-fiction
Edward Gibbon, book.author.works_written, The History of the Decline and Fall of the Roman Empire: Vol. 7
Roman Empire, base.monetarydebase.governments_that_debase.largest_denomination, m.05b9fpl
Edward Gibbon, book.author.works_written, The History of the Decline and Fall of the Roman Empire: Vol. 1
Roman Empire, military.military_combatant.military_conflicts, m.04y_8s7
The History of the Decline and Fall of the Roman Empire: Vol. 4, common.topic.article, m.06wf6xp
Titus, people.person.nationality, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.0fs6xjh
The History of the Decline and Fall of the Roman Empire: Vol. 7, book.book.editions, The History of the Decline and Fall of the Roman Empire: Vol. 7
Roman Empire, military.military_combatant.military_conflicts, m.04z6xxv
Roman Empire, royalty.system_of_nobility.titles, m.0gf9wj4
The History of the Decline and Fall of the Roman Empire: Vol. 2, book.written_work.subjects, Roman Empire
Roman Empire, location.country.form_of_government, Autocracy
Roman Empire, military.military_combatant.military_conflicts, m.04z74kq
The History of the Decline and Fall of the Roman Empire: Vol. 6, book.written_work.part_of_series, The History of the Decline and Fall of the Roman Empire
m.0w_k7yp, government.government_position_held.governmental_body, Roman Senate
Roman emperor, people.profession.people_with_this_profession, Trajan
m.048zt46, military.military_command.military_combatant, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 5, book.book.genre, Non-fiction
m.04yv0k1, military.military_combatant_group.combatants, Roman Empire
Roman Empire, common.topic.notable_for, g.1255jhsl0
The Roman Empire and Its Germanic Peoples, book.written_work.subjects, Germanic peoples
Roman Empire, fictional_universe.fictional_setting.languages, Latin Language
Autocracy, government.form_of_government.countries, Byzantine Empire
m.0ngxd7s, government.government_position_held.basic_title, Roman emperor
Roman Empire, military.military_combatant.military_conflicts, m.04yw37r
The History of the Decline and Fall of the Roman Empire: Vol. 2, book.written_work.part_of_series, The History of the Decline and Fall of the Roman Empire
First Jewish–Roman War, base.culturalevent.event.entity_involved, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 6, book.written_work.next_in_series, The History of the Decline and Fall of the Roman Empire: Vol. 7
Roman Empire, military.military_combatant.military_conflicts, m.048zz0x
Roman Empire, military.military_combatant.military_conflicts, m.0c05v9w
Roman Empire, military.military_combatant.military_conflicts, m.04yymzq
Roman Empire, military.military_combatant.military_conflicts, m.04yynht
Roman Empire, military.military_combatant.military_conflicts, m.04z0r7n
Roman Empire, military.military_combatant.military_conflicts, m.04z74p6
m.0gf9wj4, royalty.system_title_relationship.system, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 2, book.book.editions, The History of the Decline and Fall of the Roman Empire: Vol. 2
The History of the Decline and Fall of the Roman Empire: Vol. 4, common.topic.notable_types, Book
m.0w_k7yp, government.government_position_held.office_position_or_title, Roman consul
m.04yyhq9, military.military_combatant_group.combatants, Roman Empire
Roman–Persian Wars, base.culturalevent.event.entity_involved, Roman Empire
m.04y_9f9, military.military_combatant_group.combatants, Roman Empire
Roman Empire, common.topic.image, Roman Empire 117 AD
The Roman Empire and Its Germanic Peoples, book.written_work.subjects, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yv15g
The History of the Decline and Fall of the Roman Empire: Vol. 3, book.written_work.author, Edward Gibbon
Roman consul, government.government_office_or_title.office_holders, m.0w_k7yp
Roman Empire, military.military_combatant.military_conflicts, m.04yyn4w
m.048zt3v, military.military_combatant_group.combatants, Roman Empire
m.04y_8r5, military.military_combatant_group.combatants, Roman Empire
Roman Empire, film.film_subject.films, The Robe
Roman Empire, military.military_combatant.military_conflicts, m.04yybcw
Roman Empire, military.military_combatant.military_conflicts, m.04yyhq9
Roman Empire, military.military_combatant.military_commanders, m.048zs__
The History of the Decline and Fall of the Roman Empire: Vol. 6, book.book.genre, Non-fiction
Roman Empire, military.military_combatant.military_conflicts, m.04yyn8f
Roman Empire, military.military_combatant.military_conflicts, m.04yypmf
Roman Empire, common.topic.article, m.06cm_
m.0ngxd7s, government.government_position_held.jurisdiction_of_office, Roman Empire
m.04y_7j9, military.military_combatant_group.combatants, Roman Empire
Roman Empire, location.location.people_born_here, g.11b62y00s2
Roman Empire, government.governmental_jurisdiction.governing_officials, m.0ngxd7s
The History of the Decline and Fall of the Roman Empire: Vol. 1, book.book.genre, Non-fiction
Roman Empire, military.military_combatant.military_conflicts, m.0648xgk
The History of the Decline and Fall of the Roman Empire: Vol. 2, common.topic.notable_types, Book
The Roman Empire and Its Germanic Peoples, common.topic.notable_types, Book
The History of the Decline and Fall of the Roman Empire: Vol. 5, book.written_work.previous_in_series, The History of the Decline and Fall of the Roman Empire: Vol. 4
The History of the Decline and Fall of the Roman Empire: Vol. 6, book.written_work.author, Edward Gibbon
m.048zt0d, military.military_command.military_combatant, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yvzx5
m.0b7hgc7, military.military_combatant_group.combatants, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 7, common.topic.notable_for, g.125bpyqpc
Centurion, book.written_work.subjects, Roman Empire
m.048zt4f, military.military_command.military_combatant, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yyl91
The History of the Decline and Fall of the Roman Empire: Vol. 7, book.written_work.author, Edward Gibbon
The History of the Decline and Fall of the Roman Empire: Vol. 2, book.book.genre, Non-fiction
Edward Gibbon, book.author.works_written, The History of the Decline and Fall of the Roman Empire: Vol. 6
m.05prg1q, military.military_command.military_combatant, Roman Empire
Autocracy, government.form_of_government.countries, Russian Empire
Roman Empire, military.military_combatant.military_conflicts, m.05nxjh8
Roman Empire, military.military_combatant.military_conflicts, m.04yypm5
Roman Empire, base.ontologies.ontology_instance.equivalent_instances, m.07nfqr2
The History of the Decline and Fall of the Roman Empire: Vol. 3, common.topic.notable_for, g.125b2_z13
The History of the Decline and Fall of the Roman Empire: Vol. 3, book.book.editions, The History of the Decline and Fall of the Roman Empire: Vol. 3
Roman Empire, military.military_combatant.military_conflicts, m.04yyx6k
m.0ws8wk6, location.partial_containment_relationship.partially_contains, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 4, common.topic.notable_for, g.1257j94pb
Roman emperor, government.government_office_category.officeholders, m.0ngxd7s
Roman Empire 117 AD, common.image.size, m.02d35gm
Roman–Parthian Wars, base.culturalevent.event.entity_involved, Roman Empire
Roman Empire, book.book_subject.works, The History of the Decline and Fall of the Roman Empire: Vol. 2

Answer: Autocracy