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 was the roman political system? 
Knowledge Triplets: The History of the Decline and Fall of the Roman Empire: Vol. 4, common.topic.notable_types, Book
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. 6, book.written_work.previous_in_series, The History of the Decline and Fall of the Roman Empire: Vol. 5
Roman Empire, location.location.people_born_here, g.121p62yj
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
Roman Empire, military.military_combatant.military_commanders, m.048zs__
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
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–Persian Wars, base.culturalevent.event.entity_involved, Byzantine Empire
Roman Empire, military.military_combatant.military_conflicts, m.04z21j3
Roman Empire, government.governmental_jurisdiction.governing_officials, m.0w_k7yp
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.04y_9f9
Roman–Parthian Wars, military.military_conflict.combatants, m.04z6xxv
Roman Empire, military.military_combatant.military_conflicts, m.04yyp3_
The History of the Decline and Fall of the Roman Empire: Vol. 3, book.written_work.author, Edward Gibbon
The History of the Decline and Fall of the Roman Empire: Vol. 5, book.written_work.subjects, Roman Empire
Roman Empire, location.location.people_born_here, g.11b62y00s2
Roman Empire, base.ontologies.ontology_instance.equivalent_instances, m.07nfqr2
Roman Empire, fictional_universe.fictional_setting.languages, Greek Language
Roman Empire, military.military_combatant.military_commanders, m.0wzb909
Roman Empire, military.military_combatant.military_conflicts, m.04z74p6
Roman Empire, military.military_combatant.military_conflicts, m.0b7hgc7
Roman Empire, military.military_combatant.military_conflicts, m.0jmx43y
Roman Empire, military.military_combatant.military_conflicts, m.04yynj8
Roman–Parthian Wars, base.culturalevent.event.entity_involved, Trajan
Roman–Persian Wars, military.military_conflict.combatants, m.04yyx6k
Roman Empire, military.military_combatant.military_conflicts, m.04ytytf
Roman Empire, military.military_combatant.military_conflicts, m.048zt8g
Autocracy, government.form_of_government.countries, Roman Empire
Roman Empire, book.book_subject.works, The Gladiator
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
m.0jmx43y, military.military_combatant_group.combatants, Roman Empire
Herwig Wolfram, book.author.works_written, The Roman Empire and Its Germanic Peoples
Roman Empire, common.topic.image, m.0291myr
Roman Empire, military.military_combatant.military_conflicts, m.04z4n1f
Roman Empire, military.military_combatant.military_conflicts, m.04yyplz
Edward Gibbon, book.author.works_written, The History of the Decline and Fall of the Roman Empire: Vol. 1
The History of the Decline and Fall of the Roman Empire: Vol. 5, common.topic.notable_for, g.1256r8_4g
Roman Empire, military.military_combatant.military_conflicts, m.04yx36x
Roman Empire, military.military_combatant.military_commanders, m.05prg1q
Edward Gibbon, book.author.works_written, The History of the Decline and Fall of the Roman Empire: Vol. 3
Roman Empire, military.military_combatant.military_conflicts, m.0fs82dk
The History of the Decline and Fall of the Roman Empire: Vol. 2, common.topic.article, m.06wf42n
Roman Empire, military.military_combatant.military_conflicts, m.0fs821s
Roman–Persian Wars, base.culturalevent.event.entity_involved, Sasanian Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yv1hl
Roman emperor, people.profession.people_with_this_profession, Vespasian
Roman Empire, film.film_subject.films, Gladiator
Roman Empire, location.location.geolocation, m.0wmrmtf
The History of the Decline and Fall of the Roman Empire: Vol. 6, book.written_work.subjects, Decline of the Roman Empire
m.0w_k7yp, government.government_position_held.jurisdiction_of_office, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 1, book.written_work.subjects, Decline of the Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 2, book.book.genre, Non-fiction
Roman consul, government.government_office_or_title.office_holders, m.0w_k7yp
Revolt of the Batavi, base.culturalevent.event.entity_involved, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04z6xxv
Autocracy, government.form_of_government.countries, Byzantine Empire
Roman–Parthian War of 161–166, military.military_conflict.combatants, m.07ssb0k
Hadrian, people.person.profession, Roman emperor
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. 4, book.written_work.author, Edward Gibbon
Roman Empire, military.military_combatant.military_conflicts, m.0fs6qvf
The Roman Empire and Its Germanic Peoples, common.topic.notable_for, g.125byq35r
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. 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.04yw37r
Roman Empire, military.military_combatant.military_conflicts, m.0648xgk
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.04yyhq9
Titus, people.person.profession, Roman emperor
The History of the Decline and Fall of the Roman Empire: Vol. 4, common.topic.notable_for, g.1257j94pb
Roman Empire, military.military_combatant.military_conflicts, m.04yyn8f
Edward Gibbon, book.author.works_written, The History of the Decline and Fall of the Roman Empire: Vol. 6
Roman Empire, military.military_combatant.military_conflicts, m.04yypm5
Edward Gibbon, book.author.works_written, The History of the Decline and Fall of the Roman Empire: Vol. 4
Rome, base.arthist.helynevek.intezmeny, Santa Maria sopra Minerva
The History of the Decline and Fall of the Roman Empire: Vol. 5, common.topic.notable_types, Book
Roman Empire, military.military_combatant.military_conflicts, m.0c05v9w
Roman Empire, common.topic.notable_for, g.1255jhsl0
Roman Empire, location.country.form_of_government, Autocracy
Roman Empire, military.military_combatant.military_conflicts, m.04yv15g
Roman–Persian Wars, base.culturalevent.event.entity_involved, Parthian Empire
Centurion, book.written_work.subjects, Roman Empire
Alexius of Rome, people.person.place_of_birth, Roman Empire
Jewish–Roman wars, base.culturalevent.event.entity_involved, Bar Kokhba revolt
Roman Empire, military.military_combatant.military_conflicts, m.04z74kq
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
Roman Empire, common.topic.image, RomanEmpire large
Roman Empire, book.book_subject.works, The Age of Constantine the Great
Roman Empire, military.military_combatant.military_conflicts, m.05nxjh8
Roman Empire, military.military_combatant.military_conflicts, m.04y_9hc
Massacre of the Latins, base.culturalevent.event.entity_involved, Roman Catholic Church
Roman Empire, military.military_combatant.military_conflicts, m.04yvzx5
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
The History of the Decline and Fall of the Roman Empire: Vol. 7, common.topic.notable_types, Book
The Roman Empire and Its Germanic Peoples, book.written_work.author, Herwig Wolfram
Roman Empire, military.military_combatant.military_conflicts, m.04y_8r5
Constantine the Great, people.person.nationality, Roman Empire
Roman Empire, book.book_subject.works, The Roman Empire and Its Germanic Peoples
Roman Empire, location.location.contains, Cilicia
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
Edward Gibbon, book.author.works_written, The History of the Decline and Fall of the Roman Empire: Vol. 2
Roman Empire, military.military_combatant.military_conflicts, m.04yxbg4
m.0291myr, common.image.appears_in_topic_gallery, Roman Empire
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. 4, book.written_work.subjects, Roman Empire
Roman Empire, royalty.system_of_nobility.titles, m.0gf9wnr
Roman Empire, location.country.administrative_divisions, Africa Proconsularis
m.0b7hhs4, military.military_command.military_combatant, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 7, book.written_work.subjects, Decline of the Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yyp6x
Roman Empire 117 AD, common.image.size, m.02d35gm
m.0ngxd7s, government.government_position_held.basic_title, Roman emperor
m.0gf9wj4, royalty.system_title_relationship.system, Roman Empire
Ephesus, common.topic.subjects, Roman Empire
Roman Empire, book.book_subject.works, The History of the Decline and Fall of the Roman Empire: Vol. 3
Roman Empire, military.military_combatant.military_conflicts, m.07ssb0k
Roman Empire, military.military_combatant.military_conflicts, m.04yynht
Roman Empire, military.military_combatant.military_conflicts, m.04yypd1
The History of the Decline and Fall of the Roman Empire: Vol. 6, common.topic.notable_for, g.125bd49gz
m.048zt4f, military.military_command.military_combatant, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yyp4p
m.0t5qtbp, military.military_combatant_group.combatants, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yynbg
m.0wzb909, military.military_command.military_combatant, Roman Empire
Roman Empire, location.location.partially_contained_by, m.0ws8wk6
m.0w_k7yp, government.government_position_held.governmental_body, Roman Senate
Edward Gibbon, book.author.works_written, The History of the Decline and Fall of the Roman Empire: Vol. 7
RomanEmpire large, common.image.appears_in_topic_gallery, Roman Empire
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
The History of the Decline and Fall of the Roman Empire: Vol. 2, book.written_work.subjects, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 1, common.topic.notable_types, Book
The History of the Decline and Fall of the Roman Empire: Vol. 3, common.topic.notable_types, Book
The History of the Decline and Fall of the Roman Empire: Vol. 5, book.book.genre, Non-fiction
Roman Empire, military.military_combatant.military_conflicts, m.0fs6xjh
Roman Empire, government.form_of_government.countries, Autocracy
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
Roman–Parthian War of 161–166, base.culturalevent.event.entity_involved, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 6, common.topic.article, m.06wfbgp
Roman Empire, location.country.capital, Rome
The Roman Empire and Its Germanic Peoples, book.book.editions, The Roman Empire and Its Germanic Peoples
Roman Empire, military.military_combatant.military_conflicts, m.04z0r85
Roman–Persian Wars, base.culturalevent.event.entity_involved, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yw_16
Roman Empire, military.military_combatant.military_conflicts, m.04yyhld
Roman Empire, military.military_combatant.military_commanders, m.048zt0d
Roman Empire, book.book_subject.works, The History of the Decline and Fall of the Roman Empire: Vol. 7
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, book.book_subject.works, Centurion
Roman–Parthian Wars, base.culturalevent.event.entity_involved, Parthian Empire
Roman Empire, military.military_combatant.military_commanders, m.0b7hhs4
Roman emperor, people.profession.people_with_this_profession, Titus
Roman Empire, location.statistical_region.population, m.0ngxd03
Roman–Persian Wars, base.culturalevent.event.entity_involved, Shapur I
Roman Empire, location.location.partially_contained_by, m.0ws8w7_
The History of the Decline and Fall of the Roman Empire: Vol. 1, book.written_work.subjects, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04y_96k
Roman Empire, book.book_subject.works, Memoirs of Hadrian
Germanic peoples, book.book_subject.works, The Roman Empire and Its Germanic Peoples
Roman Empire, military.military_combatant.military_conflicts, m.04yy59k
Roman Empire, military.military_combatant.military_conflicts, m.04yv0k1
The Roman Empire and Its Germanic Peoples, book.book.genre, Non-fiction
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
Roman Empire, military.military_combatant.military_conflicts, m.04yzgh6
The Roman Empire and Its Germanic Peoples, book.translated_work.translations, The Roman Empire and Its Germanic Peoples
Roman Empire, military.military_combatant.military_conflicts, m.04yytvg
Roman Empire, military.military_combatant.military_conflicts, m.048zt3v
The History of the Decline and Fall of the Roman Empire: Vol. 2, common.topic.notable_for, g.1255xlhhc
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.04yz542
Cilicia, common.topic.image, Roman Empire 125
The Roman Empire and Its Germanic Peoples, book.written_work.subjects, Germanic peoples
Roman Empire, military.military_combatant.military_conflicts, m.04yypjc
Roman Empire, military.military_combatant.force_deployments, m.0b7hjs5
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
The History of the Decline and Fall of the Roman Empire: Vol. 1, book.written_work.author, Edward Gibbon
Roman Empire, common.topic.article, m.06cm_
m.07nfqr2, base.ontologies.ontology_instance_mapping.freebase_topic, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 3, common.topic.notable_for, g.125b2_z13
Roman Empire, military.military_combatant.military_conflicts, m.048zsyf
Roman Empire, military.military_combatant.military_conflicts, m.04y_8_s
Roman Empire, military.military_combatant.military_conflicts, m.04yynwh
m.0w_k7yp, government.government_position_held.office_position_or_title, Roman consul
Roman Empire, military.military_combatant.military_conflicts, m.04z212s
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. 6, common.topic.notable_types, Book
Roman Empire, base.schemastaging.context_name.pronunciation, g.125_qw5d4
The History of the Decline and Fall of the Roman Empire: Vol. 5, book.written_work.author, Edward Gibbon
m.048zz14, military.military_command.military_combatant, Roman Empire
Roman Empire, military.military_combatant.military_commanders, m.048zt4f
Great Conspiracy, base.culturalevent.event.entity_involved, Roman Empire
Roman Empire, military.military_combatant.military_commanders, m.048zt46
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
The History of the Decline and Fall of the Roman Empire: Vol. 2, book.written_work.subjects, Decline of the Roman Empire
Roman Empire, common.topic.notable_types, Country
Marcomannic Wars, base.culturalevent.event.entity_involved, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 2, common.topic.notable_types, Book
Roman Empire, military.military_combatant.military_conflicts, m.04z0r7n
Roman Empire, military.military_combatant.military_conflicts, m.04yyx56
Roman Empire, military.military_combatant.military_conflicts, m.04yx1rk
Roman Empire, base.monetarydebase.governments_that_debase.largest_denomination, m.05b9fpl
The History of the Decline and Fall of the Roman Empire: Vol. 1, common.topic.notable_for, g.1256c6b48
The History of the Decline and Fall of the Roman Empire: Vol. 4, common.topic.article, m.06wf6xp
The History of the Decline and Fall of the Roman Empire: Vol. 5, book.written_work.subjects, Decline of the Roman Empire
The Roman Empire and Its Germanic Peoples, common.topic.notable_types, Book
Roman–Parthian Wars, base.culturalevent.event.entity_involved, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yypjj
Roman–Parthian Wars, book.book_subject.works, Centurion
Roman–Parthian War of 58–63, military.military_conflict.combatants, m.04z74kq
First Jewish–Roman War, base.culturalevent.event.entity_involved, Roman Empire
Roman Miroshnichenko, people.person.gender, Male
Roman–Persian Wars, base.culturalevent.event.entity_involved, Gaius Furius Sabinius Aquila Timesitheus
Roman Empire, military.military_combatant.military_conflicts, m.0fs8d74
Roman Empire, military.military_combatant.military_conflicts, m.04yyx6k
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. 2, book.written_work.next_in_series, The History of the Decline and Fall of the Roman Empire: Vol. 3
Roman Empire, common.topic.subject_of, Ephesus
Roman emperor, government.government_office_category.officeholders, m.0ngxd7s
Roman Empire, military.military_combatant.military_conflicts, m.05cbwst
The History of the Decline and Fall of the Roman Empire: Vol. 7, book.written_work.author, Edward Gibbon
Roman Empire, military.military_combatant.military_conflicts, m.048zz0x
Roman Empire, fictional_universe.fictional_setting.languages, Latin Language
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
Catholicism, religion.religion.organizations, Roman Catholic Church
m.048zs__, military.military_command.military_combatant, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yyn4w
Roman Empire, military.military_combatant.military_conflicts, m.04y_8s7
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. 2, book.written_work.author, Edward Gibbon
The History of the Decline and Fall of the Roman Empire: Vol. 1, common.topic.article, m.06wdx_3
Roman Empire, military.military_combatant.military_conflicts, m.04yypmf
Edward Gibbon, book.author.series_written_or_contributed_to, The History of the Decline and Fall of the Roman Empire
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
The Roman Empire and Its Germanic Peoples, book.written_work.subjects, Roman Empire
Roman–Parthian War of 58–63, base.culturalevent.event.entity_involved, Parthian Empire
Roman Empire, book.book_subject.works, The Eagle in the Sand
Roman Empire, military.military_combatant.military_conflicts, m.04yyhqj
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.05prg15
Vespasian, people.person.nationality, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yyp4d
Roman Empire, military.military_combatant.military_conflicts, m.04z31gb
Roman Empire, military.military_combatant.military_conflicts, m.04yyl91
Roman Empire, military.military_combatant.military_conflicts, m.04yybcw
Roman Empire, military.military_combatant.military_commanders, m.048zz14
Roman–Persian Wars, base.culturalevent.event.entity_involved, Trajan
Roman Empire, film.film_subject.films, The Robe
Roman–Parthian War of 58–63, base.culturalevent.event.entity_involved, Roman Empire
Roman Empire, government.governmental_jurisdiction.governing_officials, m.0ngxd7s
The Roman Empire and Its Germanic Peoples, book.book.editions, The Roman Empire and its Germanic peoples
Alexius of Rome, common.topic.article, m.04y87l
The Robe, film.film.subjects, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 3, common.topic.article, m.06wf5mz
m.05prg1q, military.military_command.military_combatant, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04ywrm8
m.0gf9wnr, royalty.system_title_relationship.system, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yynhl
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
Roman Empire, military.military_combatant.military_conflicts, m.04yyndt
m.048zt0d, military.military_command.military_combatant, Roman Empire
Roman Empire, book.book_subject.works, The History of the Decline and Fall of the Roman Empire: Vol. 4
m.048zt46, military.military_command.military_combatant, Roman Empire
Roman Empire, location.country.capital, Ravenna
The History of the Decline and Fall of the Roman Empire: Vol. 6, book.written_work.author, Edward Gibbon
Caesar's Civil War, base.culturalevent.event.entity_involved, Roman Senate
Ulpian, people.person.nationality, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yymzq
Jewish–Roman wars, base.culturalevent.event.entity_involved, Vespasian
The History of the Decline and Fall of the Roman Empire: Vol. 7, common.topic.notable_for, g.125bpyqpc
m.0ngxd7s, government.government_position_held.jurisdiction_of_office, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 4, book.written_work.subjects, Decline of the Roman Empire
Jewish–Roman wars, base.culturalevent.event.entity_involved, Roman Empire
Roman Empire, location.country.capital, Constantinople
The History of the Decline and Fall of the Roman Empire: Vol. 6, book.written_work.subjects, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.0t5qtbp
Roman Empire, military.military_combatant.military_conflicts, m.04yvn32
Roman Empire, book.book_subject.works, The History of the Decline and Fall of the Roman Empire: Vol. 6
Roman Empire, location.location.partially_contained_by, m.0ws8w38
Vespasian, people.person.profession, Roman emperor
The History of the Decline and Fall of the Roman Empire: Vol. 3, book.written_work.subjects, Roman Empire
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 Catholic Church, religion.religious_organization.associated_with, Catholicism
Roman Empire, military.military_combatant.military_conflicts, m.04yyp76
Roman Empire, book.book_subject.works, The History of the Decline and Fall of the Roman Empire: Vol. 1
The History of the Decline and Fall of the Roman Empire: Vol. 3, book.book.genre, Non-fiction
Roman Empire, location.country.official_language, Latin Language
Roman Empire, military.military_combatant.military_conflicts, m.04z0bs7
Roman Empire, common.topic.image, Roman Empire 117 AD
Titus, people.person.nationality, Roman Empire
Roman Empire 117 AD, common.image.appears_in_topic_gallery, Roman Empire
Roman emperor, people.profession.people_with_this_profession, Trajan
The Roman Empire and Its Germanic Peoples, common.topic.article, m.06n3l2k
Roman Empire, book.book_subject.works, The History of the Decline and Fall of the Roman Empire: Vol. 2
Roman emperor, people.profession.people_with_this_profession, Hadrian
The History of the Decline and Fall of the Roman Empire: Vol. 5, common.topic.article, m.06wf8ks
Roman–Persian Wars, base.culturalevent.event.entity_involved, Valerian
Roman Senate, government.governmental_body.members, m.0w_k7yp
Roman–Parthian War of 161–166, base.culturalevent.event.entity_involved, Parthian Empire
The History of the Decline and Fall of the Roman Empire: Vol. 3, book.written_work.subjects, Decline of the Roman Empire
Jewish revolt against Constantius Gallus, base.culturalevent.event.entity_involved, 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
Gladiator, film.film.subjects, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 7, book.book.genre, Non-fiction
Roman Empire, location.location.contains, g.120phpf9
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
Roman Empire, military.military_combatant.military_conflicts, m.04y_7j9
Roman Empire, royalty.system_of_nobility.titles, m.0gf9wj4

Answer: Autocracy