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 did the ancient romans speak? 
Knowledge Triplets: Roman Empire, military.military_combatant.military_commanders, m.048zz14
Roman Empire, fictional_universe.fictional_setting.languages, Latin Language
Roman–Persian Wars, time.event.includes_event, Siege of Constantinople
Roman Empire, military.military_combatant.military_commanders, m.048zt0d
Maximilian, people.person.place_of_birth, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 6, book.written_work.subjects, Roman Empire
Roman Empire, location.location.people_born_here, g.121p62yj
Roman Empire, base.ontologies.ontology_instance.equivalent_instances, m.07nfqr2
The History of the Decline and Fall of the Roman Empire: Vol. 5, common.topic.notable_types, Book
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.04yypm5
Roman Empire, book.book_subject.works, The History of the Decline and Fall of the Roman Empire: Vol. 3
Roman–Persian Wars, time.event.includes_event, Siege of Antioch
Titus, people.person.profession, Roman emperor
Vespasian, people.person.nationality, Roman Empire
Roman–Parthian Wars, common.topic.notable_types, Military Conflict
The History of the Decline and Fall of the Roman Empire: Vol. 2, common.topic.article, m.06wf42n
Roman–Persian Wars, base.culturalevent.event.entity_involved, Shapur I
Roman–Persian Wars, time.event.includes_event, Battle of Nisibis
Roman–Persian Wars, base.culturalevent.event.entity_involved, Gaius Furius Sabinius Aquila Timesitheus
Roman Empire, military.military_combatant.military_conflicts, m.04z0r85
Roman Empire, location.location.partially_contained_by, m.0ws8w7_
The Roman Empire and Its Germanic Peoples, book.written_work.subjects, Roman Empire
The Eagle in the Sand, book.written_work.subjects, Imperial Rome
Roman Empire, location.location.partially_contained_by, m.0ws8wk6
The History of the Decline and Fall of the Roman Empire: Vol. 1, book.book.genre, Non-fiction
m.04ht2ff, people.place_lived.location, Rome
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. 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.0b7hgc7
Roman Empire, fictional_universe.fictional_setting.languages, Greek Language
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.04yynwh
Hadrian, people.person.profession, Roman emperor
Ephesus, common.topic.subjects, Roman Empire
Roman Empire, book.book_subject.works, The Gladiator
Roman Empire, military.military_combatant.military_conflicts, m.04y_7j9
Roman Empire, military.military_combatant.military_conflicts, m.04yyn8f
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.04yyx6k
Roman Empire, military.military_combatant.military_conflicts, m.04z212s
Roman Empire, military.military_combatant.military_conflicts, m.04yytvg
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
The History of the Decline and Fall of the Roman Empire: Vol. 4, common.topic.notable_types, Book
Roman Empire, book.book_subject.works, The History of the Decline and Fall of the Roman Empire: Vol. 4
Ulpian, people.person.place_of_birth, Roman Empire
Roman–Persian Wars, base.culturalevent.event.entity_involved, Trajan
Herwig Wolfram, book.author.works_written, The Roman Empire and Its Germanic Peoples
Vespasian, people.person.profession, Roman emperor
Greek Language, fictional_universe.fictional_language.where_spoken, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.0648xgk
Roman–Persian Wars, time.event.includes_event, Battle of Barbalissos
Roman Empire, military.military_combatant.military_conflicts, m.04z0bs7
Roman Empire, military.military_combatant.military_conflicts, m.04z4n1f
Roman–Parthian War of 161–166, base.culturalevent.event.entity_involved, Roman Empire
Roman Empire, location.location.partially_contained_by, m.0ws8w38
The History of the Decline and Fall of the Roman Empire: Vol. 4, book.written_work.subjects, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 4, book.written_work.subjects, Decline of the Roman Empire
Roman Empire, common.topic.notable_types, Country
Roman Empire, book.book_subject.works, The Roman Empire and Its Germanic Peoples
Edward Gibbon, book.author.works_written, The History of the Decline and Fall of the Roman Empire: Vol. 6
Roman–Parthian Wars, book.book_subject.works, Centurion
The History of the Decline and Fall of the Roman Empire: Vol. 7, common.topic.notable_types, Book
Roman Empire, military.military_combatant.military_conflicts, m.04yybcw
Roman Empire, military.military_combatant.military_conflicts, m.04yypd1
Centurion, book.written_work.subjects, Roman Empire
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, common.topic.notable_for, g.1255xlhhc
Alexius of Rome, common.topic.article, m.04y87l
Roman Empire, military.military_combatant.military_conflicts, m.04yzgh6
Titus, people.person.place_of_birth, Rome
Roman Empire, military.military_combatant.military_conflicts, m.04ytytf
Roman Empire, location.country.capital, Rome
Roman Empire, military.military_combatant.military_conflicts, m.04z0r7n
Roman Empire, location.location.people_born_here, Publius Quinctilius Varus
Roman Empire, book.book_subject.works, Memoirs of Hadrian
Roman Empire, base.schemastaging.context_name.pronunciation, g.125_qw5d4
The History of the Decline and Fall of the Roman Empire: Vol. 7, book.book.genre, Non-fiction
Roman Empire, common.topic.image, m.0291myr
The History of the Decline and Fall of the Roman Empire: Vol. 1, book.written_work.author, Edward Gibbon
Roman Empire, common.topic.notable_for, g.1255jhsl0
Roman Empire, military.military_combatant.military_conflicts, m.048zz0x
Greek Language, common.topic.notable_for, g.125dx7kh0
Roman Empire, military.military_combatant.military_conflicts, m.04yvzx5
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.04z74p6
Roman–Parthian War of 58–63, base.culturalevent.event.entity_involved, Parthian Empire
Roman emperor, people.profession.people_with_this_profession, Hadrian
Roman Empire, military.military_combatant.military_conflicts, m.04yyp3_
Edward Gibbon, book.author.series_written_or_contributed_to, The History of the Decline and Fall of the Roman Empire
Roman–Parthian Wars, book.book_subject.works, The Eagle in the Sand
The History of the Decline and Fall of the Roman Empire: Vol. 5, common.topic.article, m.06wf8ks
Roman Empire, location.location.contains, g.120phpf9
Roman Empire 117 AD, common.image.appears_in_topic_gallery, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 2, common.topic.notable_types, Book
Roman Empire, location.country.capital, Constantinople
Roman–Persian Wars, time.event.includes_event, Battle of Misiche
The Roman Empire and Its Germanic Peoples, book.book.editions, The Roman Empire and Its Germanic Peoples
Roman emperor, people.profession.people_with_this_profession, Vespasian
Roman–Persian Wars, time.event.locations, Syria
Roman–Persian Wars, time.event.includes_event, Siege of Singara
Roman Empire, book.book_subject.works, 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. 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, common.topic.notable_for, g.125bd49gz
Roman–Parthian Wars, base.culturalevent.event.entity_involved, Parthian Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yymzq
Roman–Parthian War of 161–166, time.event.locations, Mesopotamia
Roman–Parthian Wars, time.event.included_in_event, Roman–Persian Wars
Roman Empire, military.military_combatant.military_conflicts, m.04yyl91
Roman Empire, book.book_subject.works, The History of the Decline and Fall of the Roman Empire: Vol. 7
Roman Empire, military.military_combatant.military_conflicts, m.04yx1rk
Roman Empire, military.military_combatant.military_conflicts, m.04z74kq
The Eagle in the Sand, book.written_work.subjects, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yynj8
Alexius of Rome, people.deceased_person.place_of_death, Roman Empire
Roman Empire, common.topic.image, Roman Empire 117 AD
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
Paul I of Constantinople, people.person.place_of_birth, Roman Empire
Alexius of Rome, people.person.place_of_birth, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 3, book.book.genre, Non-fiction
Roman Empire, book.book_subject.works, The History of the Decline and Fall of the Roman Empire: Vol. 6
Roman Empire, military.military_combatant.military_conflicts, m.04yw37r
Roman Empire, military.military_combatant.military_conflicts, m.048zt3v
Roman Empire, book.book_subject.works, The Age of Constantine the Great
m.07nfqr2, base.ontologies.ontology_instance_mapping.freebase_topic, Roman Empire
Edward Gibbon, book.author.works_written, The History of the Decline and Fall of the Roman Empire: Vol. 2
Roman Miroshnichenko, people.person.gender, Male
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
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.04yyp76
Titus, people.person.nationality, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yyn4w
Roman Empire, military.military_combatant.military_commanders, m.0b7hhs4
The Roman Empire and Its Germanic Peoples, common.topic.notable_types, Book
Roman Empire, location.location.people_born_here, Ulpian
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.04yyhqj
Alexius of Rome, common.topic.notable_for, g.1256gwpjw
The History of the Decline and Fall of the Roman Empire: Vol. 6, book.book.genre, Non-fiction
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
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. 5, book.written_work.author, Edward Gibbon
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.04yynbg
Latin Language, music.genre.artists, Roman Miroshnichenko
Roman Empire, military.military_combatant.military_conflicts, m.04yyx56
Roman–Persian Wars, time.event.includes_event, Roman–Parthian Wars
Roman Empire, location.statistical_region.population, m.0ngxd03
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. 7, common.topic.article, m.06wffb9
Eunomius of Cyzicus, people.person.place_of_birth, Roman Empire
The Age of Constantine the Great, book.written_work.subjects, Roman Empire
Roman Empire 117 AD, common.image.size, m.02d35gm
Roman Empire, military.military_combatant.military_conflicts, m.04yypjj
Roman–Persian Wars, base.culturalevent.event.entity_involved, Parthian Empire
Germanic peoples, book.book_subject.works, The Roman Empire and Its Germanic Peoples
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, royalty.system_of_nobility.titles, m.0gf9wnr
m.0291myr, common.image.appears_in_topic_gallery, Roman Empire
The Roman Empire and Its Germanic Peoples, common.topic.article, m.06n3l2k
The History of the Decline and Fall of the Roman Empire: Vol. 3, book.written_work.author, Edward Gibbon
Roman Empire, military.military_combatant.military_conflicts, m.05nxjh8
Roman Empire, military.military_combatant.military_conflicts, m.07ssb0k
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. 1, book.written_work.subjects, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yyhld
Roman Empire, location.location.contains, Cilicia
Roman Empire, military.military_combatant.military_conflicts, m.0jmx43y
Roman Empire, military.military_combatant.military_conflicts, m.04y_8r5
Roman Empire, book.book_subject.works, The History of the Decline and Fall of the Roman Empire: Vol. 5
Roman–Parthian Wars, time.event.locations, Mesopotamia
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.04yv15g
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–Parthian Wars, military.military_conflict.combatants, m.04z6xxv
Roman Empire, military.military_combatant.military_conflicts, m.0fs8d74
Roman Empire, military.military_combatant.military_conflicts, m.04yyp6x
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
Coelia Concordia, people.person.place_of_birth, Roman Empire
Demophilus of Constantinople, people.person.place_of_birth, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 4, common.topic.notable_for, g.1257j94pb
The History of the Decline and Fall of the Roman Empire: Vol. 5, book.written_work.subjects, Decline of the Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 7, common.topic.notable_for, g.125bpyqpc
Roman Empire, military.military_combatant.military_conflicts, m.04yvlvy
Roman Empire, royalty.system_of_nobility.titles, m.0gf9wj4
The History of the Decline and Fall of the Roman Empire: Vol. 4, book.written_work.author, Edward Gibbon
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.04yy59k
Roman Empire, military.military_combatant.military_commanders, m.05prg1q
Roman emperor, people.profession.people_with_this_profession, Trajan
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
Roman Empire, book.book_subject.works, Centurion
Roman Empire, military.military_combatant.military_conflicts, m.04yyhq9
Roman Empire, military.military_combatant.military_commanders, m.048zs__
Roman–Persian Wars, base.culturalevent.event.entity_involved, Valerian
Roman Empire, military.military_combatant.military_commanders, m.0wzb909
Latin Language, fictional_universe.fictional_language.where_spoken, 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 Empire, military.military_combatant.military_commanders, m.048zt4f
Roman–Persian Wars, base.culturalevent.event.entity_involved, Byzantine Empire
Roman–Persian Wars, base.culturalevent.event.entity_involved, Sasanian Empire
Publius Quinctilius Varus, people.person.place_of_birth, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04z31gb
Roman Empire, military.military_combatant.military_conflicts, m.04yv1hl
Roman–Persian Wars, time.event.includes_event, Siege of Amida
Roman–Persian Wars, base.culturalevent.event.entity_involved, Roman Empire
Roman Empire, military.military_combatant.military_conflicts, m.04yz542
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.04yyplz
Trajan, people.person.nationality, Roman Empire
Roman Empire, film.film_subject.films, Gladiator
Roman Empire, military.military_combatant.military_conflicts, m.048zt8g
RomanEmpire large, common.image.appears_in_topic_gallery, Roman Empire
Roman Empire, location.location.people_born_here, Augustine of Hippo
Roman–Persian Wars, military.military_conflict.combatants, m.04yyx6k
Roman–Parthian Wars, base.culturalevent.event.entity_involved, Roman Empire
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.05prg15
Edward Gibbon, book.author.works_written, The History of the Decline and Fall of the Roman Empire: Vol. 3
The Roman Empire and Its Germanic Peoples, book.written_work.subjects, Germanic peoples
Roman Empire, military.military_combatant.military_conflicts, m.04ywrm8
Eudoxius of Antioch, people.person.place_of_birth, Roman Empire
Roman–Parthian Wars, time.event.includes_event, Roman–Parthian War of 161–166
Latin Language, book.book_subject.works, Ad Infinitum: A Biography of Latin
Augustine of Hippo, people.person.place_of_birth, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 6, common.topic.article, m.06wfbgp
Roman Empire, location.location.people_born_here, Alexius of Rome
The History of the Decline and Fall of the Roman Empire: Vol. 1, common.topic.article, m.06wdx_3
Edward Gibbon, book.author.works_written, 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. 5, book.book.genre, Non-fiction
m.07ssb0k, military.military_combatant_group.conflict, Roman–Parthian War of 161–166
Roman–Persian Wars, time.event.includes_event, Battle of Resaena
Roman Empire, location.country.official_language, Latin Language
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
m.04ht2ff, people.place_lived.person, Alexius of Rome
Roman–Parthian War of 161–166, military.military_conflict.combatants, m.07ssb0k
The History of the Decline and Fall of the Roman Empire: Vol. 2, book.book.genre, Non-fiction
The Roman Empire and Its Germanic Peoples, common.topic.notable_for, g.125byq35r
Roman–Persian Wars, time.event.includes_event, Battle of Ctesiphon
Roman Empire, military.military_combatant.military_conflicts, m.04yyp4d
Roman Empire, location.location.geolocation, m.0wmrmtf
Rome, base.arthist.helynevek.intezmeny, Santa Maria sopra Minerva
Roman Empire, location.location.people_born_here, g.11b62y00s2
Centurion, book.written_work.subjects, Roman–Parthian Wars
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, government.governmental_jurisdiction.governing_officials, m.0ngxd7s
The History of the Decline and Fall of the Roman Empire: Vol. 2, book.written_work.author, Edward Gibbon
Roman Empire, military.military_combatant.military_conflicts, m.0c05v9w
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. 1, book.written_work.subjects, Decline of the Roman Empire
Roman–Persian Wars, time.event.includes_event, Battle of Samarra
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
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.0t5qtbp
Cilicia, common.topic.image, Roman Empire 125
Roman Empire, military.military_combatant.military_conflicts, m.048zsyf
Roman Empire, common.topic.image, RomanEmpire large
Roman Empire, military.military_combatant.military_conflicts, m.04yxbg4
Roman Empire, location.location.people_born_here, Paul I of Constantinople
Constantine the Great, people.person.nationality, Roman Empire
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 Empire, military.military_combatant.military_conflicts, m.04yypjc
The History of the Decline and Fall of the Roman Empire: Vol. 3, common.topic.article, m.06wf5mz
The Robe, film.film.subjects, Roman Empire
The Roman Empire and Its Germanic Peoples, book.written_work.author, Herwig Wolfram
Roman Empire, military.military_combatant.military_conflicts, m.04yyndt
Roman Empire, military.military_combatant.military_conflicts, m.04yvn32
The History of the Decline and Fall of the Roman Empire: Vol. 3, book.written_work.subjects, Decline of the Roman Empire
Roman Empire, book.book_subject.works, The Eagle in the Sand
The History of the Decline and Fall of the Roman Empire: Vol. 3, book.written_work.subjects, Roman Empire
Edward Gibbon, book.author.works_written, The History of the Decline and Fall of the Roman Empire: Vol. 7
The Gladiator, book.written_work.subjects, Roman Empire
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, 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
Mesopotamia, location.location.events, Roman–Parthian War of 161–166
Roman Miroshnichenko, music.artist.genre, Latin Language
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.previous_in_series, The History of the Decline and Fall of the Roman Empire: Vol. 5
Roman Empire, military.military_combatant.military_conflicts, m.04yw_16
Roman Empire, military.military_combatant.military_conflicts, m.0fs82dk
Alexius of Rome, people.person.places_lived, m.04ht2ff
Roman Empire, common.topic.subject_of, Ephesus
Roman Empire, military.military_combatant.military_commanders, m.048zt46
Roman Empire, common.topic.article, m.06cm_
Roman Empire, military.military_combatant.military_conflicts, m.04z21j3
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. 6, book.written_work.next_in_series, The History of the Decline and Fall of the Roman Empire: Vol. 7
Roman Empire, location.country.form_of_government, Autocracy
Roman Empire, location.country.official_language, Latin Language
The Roman Empire and Its Germanic Peoples, book.book.genre, Non-fiction
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. 2, 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_8s7
Roman–Parthian War of 161–166, time.event.locations, Syria
Roman Empire, military.military_combatant.military_conflicts, m.04yynht
The History of the Decline and Fall of the Roman Empire: Vol. 6, common.topic.notable_types, Book
Ulpian, people.person.nationality, Roman Empire
The History of the Decline and Fall of the Roman Empire: Vol. 2, book.written_work.subjects, Roman Empire
Gladiator, film.film.subjects, Imperial Rome
Roman Empire, military.military_combatant.military_conflicts, m.05cbwst
Roman Empire, military.military_combatant.military_conflicts, m.04yv0k1
Roman Empire, military.military_combatant.military_conflicts, m.04yynhl
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
Roman–Parthian Wars, base.culturalevent.event.entity_involved, Trajan
Roman–Parthian War of 58–63, military.military_conflict.combatants, m.04z74kq
Roman–Persian Wars, time.event.locations, Mesopotamia
m.04yyl91, military.military_combatant_group.combatants, Roman Empire
Roman–Parthian War of 161–166, base.culturalevent.event.entity_involved, Parthian Empire
Roman–Persian Wars, time.event.includes_event, Battle of Edessa
Roman Empire, film.film_subject.films, The Robe
Roman Empire, location.location.people_born_here, Eudoxius of Antioch
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
Roman Empire, military.military_combatant.military_conflicts, m.04yyp4p
Roman–Parthian War of 58–63, base.culturalevent.event.entity_involved, Roman Empire
Trajan, people.person.profession, Roman emperor
Roman Empire, location.location.people_born_here, Eunomius of Cyzicus

Answer: Latin Language