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: when did the battle of thermopylae occur? 
Knowledge Triplets: Battle of Salamis, base.culturalevent.event.entity_involved, Achaemenid Empire
Battle of Plataea, base.culturalevent.event.entity_involved, Ancient Greece
m.09ss4b4, common.webpage.topic, 300
m.09ss4bl, common.webpage.topic, 300
Battle of Greece, time.event.includes_event, Battle of Thermopylae
Siege of Constantinople, time.event.included_in_event, Battles of macrohistorical importance involving invasions of Europe
Greece in the making, 1200-479 BC, book.written_work.subjects, History
Anatolia, location.location.events, Greco-Persian Wars
m.09xj3j1, common.webpage.topic, Battle of Thermopylae
300, common.topic.webpage, m.09ss4fd
300, common.topic.webpage, m.09ss48p
300, common.topic.webpage, m.094svn9
Persian Expedition of 1796, common.topic.notable_types, Military Conflict
Battle of Thermopylae, common.topic.image, Thermopylae ancient coastline large
m.09ss493, common.webpage.topic, 300
Battle of Thermopylae, military.military_conflict.commanders, m.02whxsh
Battle of Thermopylae, base.culturalevent.event.entity_involved, Ancient Greece
Constantinople, location.location.events, Battles of macrohistorical importance involving invasions of Europe
m.09ss4j2, common.webpage.topic, 300
Battle of Thermopylae, military.military_conflict.casualties, m.02whxrg
Thermopylae ancient coastline large, common.image.appears_in_topic_gallery, Battle of Thermopylae
Battle of Mycale, time.event.included_in_event, Greco-Persian Wars
m.05ns2g1, military.military_combatant_group.conflict, Battle of the Eurymedon
Toulouse, location.location.events, Battle of Toulouse (721)
Thermopylae, location.location.containedby, Greece
Anatolia, location.location.events, Arab–Byzantine wars
Themistocles, military.military_person.participated_in_conflicts, Battle of Artemisium
Third Sacred War, time.event.locations, Phocis
Battles of macrohistorical importance involving invasions of Europe, common.topic.notable_for, g.1259_bj0d
The 300 Spartans, film.film.subjects, Battle of Thermopylae
Egypt, location.location.events, Siege of Prosoptis
m.0949lsj, common.webpage.topic, 300
Battle of Mycale, common.topic.notable_types, Military Conflict
Leonidas at Thermopylae, common.topic.notable_for, g.1257_pxhc
m.094hc2_, common.webpage.topic, 300
300, common.topic.webpage, m.09ss4b4
Leonidas at Thermopylae, common.topic.article, m.05f6c6c
300, common.topic.webpage, m.09ss4c6
Greco-Persian Wars, time.event.locations, Ancient Greece
Persian Expedition of 1796, time.event.locations, Achaemenid Empire
Demophilus of Thespiae, people.deceased_person.place_of_death, Thermopylae
m.09ss4nn, common.webpage.topic, 300
Thermopylae, common.topic.image, Thermopylae ancient coastline large
Achaemenid Empire, common.topic.image, Achaemenid Empire 559 - 330 (BC)
Arab–Byzantine wars, time.event.locations, Anatolia
m.05nqs1w, military.military_combatant_group.conflict, Siege of Naxos (499 BC)
Thermopylae: The Battle That Changed the World, book.written_work.subjects, History
Greco-Persian Wars, time.event.includes_event, Battle of Thermopylae
Battle of Thermopylae, base.culturalevent.event.entity_involved, Xerxes I
Wars of the Diadochi, time.event.locations, Achaemenid Empire
Peloponnesian War, base.culturalevent.event.entity_involved, Pericles
Battle of Thermopylae, military.military_conflict.casualties, m.02whxs4
300, film.film.subjects, Battle of Thermopylae
Battle of Salamis, military.military_conflict.military_personnel_involved, Themistocles
Thermopylae, common.topic.notable_for, g.125640hrh
Greco-Persian Wars, common.topic.image, Greek-Persian duel
Thermopylae: The Battle That Changed the World, book.written_work.subjects, Greece
300, common.topic.webpage, m.08xfrw8
300, common.topic.webpage, m.09ss47c
m.09ss48p, common.webpage.topic, 300
m.064t2lq, visual_art.artwork_owner_relationship.artwork, Leonidas at Thermopylae
Battle of Alamana, time.event.locations, Thermopylae
m.09ss46y, common.webpage.topic, 300
Second Persian invasion of Greece, base.culturalevent.event.entity_involved, Sparta
Battle of Salamis, military.military_conflict.combatants, m.05nn2_x
Greco-Persian Wars, time.event.includes_event, g.122fj967
m.03z96bp, military.military_combatant_group.conflict, Battle of Thermopylae
Battle of Lepanto, time.event.included_in_event, Battles of macrohistorical importance involving invasions of Europe
Wars of the Diadochi, time.event.locations, Egypt
m.09ss4m0, common.webpage.topic, 300
Ancient Greece, book.book_subject.works, The Propylaia to the Athenian Akropolis
300, common.topic.webpage, m.0948dl5
300, common.topic.webpage, m.094dd0t
Third Sacred War, time.event.includes_event, Battle of Thermopylae (353 BC)
m.094stlj, common.webpage.topic, 300
m.040wgd7, military.casualties.combatant, Ancient Thebes
Leonidas I, visual_art.art_subject.artwork_on_the_subject, Leonidas at Thermopylae
Thermopylae, location.location.events, Battle of Thermopylae (353 BC)
Greece in the making, 1200-479 BC, book.written_work.subjects, Ancient Greece
Ancient Greece, book.book_subject.works, The Outbreak of the Peloponnesian War
300, common.topic.webpage, m.09ss4g8
m.09ss49k, common.webpage.topic, 300
Second Persian invasion of Greece, base.culturalevent.event.entity_involved, Themistocles
Greco-Persian Wars, time.event.includes_event, Battle of Plataea
m.040wgd7, military.casualties.military_conflict, Battle of Thermopylae
Battle of Thermopylae, base.culturalevent.event.entity_involved, Mardonius
Battle of Vienna, time.event.included_in_event, Battles of macrohistorical importance involving invasions of Europe
300, common.topic.webpage, m.09ss4bl
m.02whxsh, military.military_command.military_conflict, Battle of Thermopylae
Leonidas at Thermopylae, visual_art.artwork.dimensions_meters, m.064t2l1
Third Sacred War, time.event.locations, Ancient Greece
Ancient Thebes, military.military_combatant.military_conflicts, m.04yvpj9
m.09ss4dz, common.webpage.topic, 300
m.09ss4dj, common.webpage.topic, 300
300, common.topic.webpage, m.09ss4d2
Wars of the Diadochi, time.event.locations, Ancient Greece
The Propylaia to the Athenian Akropolis, book.written_work.subjects, Athens
The Outbreak of the Peloponnesian War, book.written_work.subjects, History
m.0945zh3, common.webpage.topic, 300
300, common.topic.webpage, m.094cjt9
m.09ss4g8, common.webpage.topic, 300
Meet the Spartans, film.film.subjects, Battle of Thermopylae
Battle of Thermopylae, common.topic.article, m.014pxc
Leonidas at Thermopylae, visual_art.artwork.art_form, Painting
Arab–Byzantine wars, time.event.includes_event, Siege of Constantinople
m.09ss4ll, common.webpage.topic, 300
The Propylaia to the Athenian Akropolis, book.written_work.subjects, History
Battle of Thermopylae, military.military_conflict.casualties, m.040wgd7
m.03z972v, military.military_combatant_group.conflict, Battle of Thermopylae
Battle of Thermopylae, user.avh.default_domain.ellerdale_topic.ellerdale_id, 009a-5ecb
The Archidamian war, book.written_work.subjects, Ancient Greece
Battle of Thermopylae, military.military_conflict.commanders, m.02whxst
m.040wgcz, military.casualties.military_conflict, Battle of Thermopylae
Leonidas at Thermopylae, common.topic.notable_types, Artwork
300, common.topic.webpage, m.094t896
Thermopylae, location.location.events, Battle of Thermopylae
Battle of Artemisium, time.event.included_in_event, Greco-Persian Wars
Arab–Byzantine wars, time.event.locations, Egypt
m.09ss47c, common.webpage.topic, 300
m.094fm92, common.webpage.topic, 300
m.09ss4d2, common.webpage.topic, 300
Battle of Thermopylae, time.event.start_date, -479
Greco-Persian Wars, time.event.locations, Egypt
Siege of Prosoptis, time.event.included_in_event, Greco-Persian Wars
Battle of Mycale, base.culturalevent.event.entity_involved, Achaemenid Empire
m.09xtfq8, common.webpage.topic, Battle of Thermopylae
Greco-Persian Wars, time.event.includes_event, Battle of Mycale
Battle of Thermopylae, common.topic.webpage, m.09xv7lq
Greco-Persian Wars, time.event.includes_event, First Persian invasion of Greece
m.02whxrr, military.casualties.combatant, Thespiae
Battle of Thermopylae, military.military_conflict.military_personnel_involved, Jack Hinton
Persian Expedition of 1796, time.event.locations, Persian Empire
Thespiae, military.military_combatant.military_conflicts, m.03z96bp
m.02whxrg, military.casualties.military_conflict, Battle of Thermopylae
m.09ss4gq, common.webpage.topic, 300
300, common.topic.webpage, m.0942x32
Persian Empire, location.location.events, Persian Expedition of 1796
Battle of Thermopylae, military.military_conflict.casualties, m.0t56dht
m.02whxs4, military.casualties.military_conflict, Battle of Thermopylae
Battles of macrohistorical importance involving invasions of Europe, time.event.included_in_event, Arab–Byzantine wars
The Archidamian war, book.written_work.subjects, Greece
Egypt, location.location.events, Wars of the Diadochi
Second Persian invasion of Greece, base.culturalevent.event.entity_involved, Hydarnes
Battle of Thermopylae, time.event.locations, Thermopylae
m.09ss4h4, common.webpage.topic, 300
The wars of the ancient Greeks, book.written_work.subjects, History
Greco-Persian Wars, time.event.locations, Aegean Islands
m.05nn95n, military.military_combatant_group.conflict, Battle of Mycale
300, common.topic.webpage, m.0949hxd
Battle of Thermopylae, base.culturalevent.event.entity_involved, Demophilus of Thespiae
Leonidas I, people.deceased_person.place_of_death, Thermopylae
Siege of Prosoptis, time.event.locations, Egypt
Mardonius, common.topic.notable_for, g.12559bcr7
300, common.topic.webpage, m.09ss4l4
Battle of Thermopylae, time.event.included_in_event, Greco-Persian Wars
m.0w61_32, dataworld.gardening_hint.last_referenced_by, Battle of Thermopylae
Iran, location.location.events, Persian Expedition of 1796
Battles of macrohistorical importance involving invasions of Europe, time.event.included_in_event, Muslim conquests
Battle of Mycale, military.military_conflict.combatants, m.05nn95n
m.094t896, common.webpage.topic, 300
The Outbreak of the Peloponnesian War, book.written_work.subjects, Ancient Greece
Battle of Lepanto, common.topic.notable_types, Military Conflict
m.094svn9, common.webpage.topic, 300
300, common.topic.webpage, m.09ss4jv
Battles of macrohistorical importance involving invasions of Europe, time.event.includes_event, Battle of Thermopylae
300, common.topic.webpage, m.09ss4cn
300, common.topic.webpage, m.09ss4m0
Jacques-Louis David, visual_art.visual_artist.artworks, Leonidas at Thermopylae
Thermopylae, common.topic.article, m.012dz9
m.05nn2_x, military.military_combatant_group.conflict, Battle of Salamis
Leonidas at Thermopylae, visual_art.artwork.media, Oil paint
Battle of Plataea, common.topic.notable_types, Military Conflict
Peloponnesian War, time.event.locations, Ancient Greece
m.09ss4cn, common.webpage.topic, 300
m.040wgcz, military.casualties.combatant, Helots
Battle of Salamis, military.military_conflict.commanders, m.04yv151
300, common.topic.webpage, m.0949lsj
300, common.topic.webpage, m.09ss4dj
300, common.topic.webpage, m.09ss4nn
m.0949hxd, common.webpage.topic, 300
Greco-Persian Wars, time.event.locations, Anatolia
300, common.topic.webpage, m.09ss4j2
Ancient Greece, location.location.events, Wars of the Diadochi
Thermopylae, location.location.events, Battle of Alamana
m.07lhspk, military.military_combatant_group.conflict, Siege of Citium
Battles of macrohistorical importance involving invasions of Europe, time.event.includes_event, Battle of the Metaurus
m.0t56dht, military.casualties.military_conflict, Battle of Thermopylae
300, common.topic.webpage, m.094hc2_
Battle of Plataea, base.culturalevent.event.entity_involved, Achaemenid Empire
300, common.topic.webpage, m.09ss4c0
300, common.topic.webpage, m.09ss4p2
Second Persian invasion of Greece, time.event.included_in_event, Greco-Persian Wars
m.0942x32, common.webpage.topic, 300
Siege of Constantinople, time.event.included_in_event, Arab–Byzantine wars
Battle of Thermopylae, common.topic.notable_for, g.12565kn6n
m.0948dl5, common.webpage.topic, 300
Battle of Plataea, base.culturalevent.event.entity_involved, Mardonius
Histories, book.book.genre, History
Siege of Constantinople, time.event.locations, Constantinople
Second Persian invasion of Greece, base.culturalevent.event.entity_involved, Pausanias
m.05nphvm, military.military_combatant_group.conflict, Battle of Ephesus
The Outbreak of the Peloponnesian War, book.written_work.subjects, Greece
Second Persian invasion of Greece, time.event.locations, Thrace
Battle of the Catalaunian Plains, time.event.included_in_event, Battles of macrohistorical importance involving invasions of Europe
300, common.topic.webpage, m.09ss4n6
m.09xv7lq, common.webpage.topic, Battle of Thermopylae
Battle of Plataea, military.military_conflict.combatants, m.05nnd0c
Thermopylae, common.topic.notable_types, Location
m.094dd0t, common.webpage.topic, 300
Battle of Greece, time.event.included_in_event, World War II
Demophilus of Thespiae, common.topic.article, m.02pyhlj
Peloponnesian War, base.culturalevent.event.entity_involved, Sparta
m.09ss47t, common.webpage.topic, 300
Battle of Thermopylae, military.military_conflict.combatants, m.03z972v
Battle of Artemisium, common.topic.notable_types, Military Conflict
Second Persian invasion of Greece, base.culturalevent.event.entity_involved, Mardonius
Greco-Persian Wars, time.event.locations, Ancient Egypt
Jack Hinton, military.military_person.participated_in_conflicts, Battle of Thermopylae
Thermopylae, location.location.geolocation, m.02_h3c8
m.09ss4n6, common.webpage.topic, 300
Battles of macrohistorical importance involving invasions of Europe, time.event.includes_event, Battle of Lepanto
300, common.topic.webpage, m.09ss4k8
Battle of Thermopylae, time.event.end_date, -479
The wars of the ancient Greeks, book.written_work.subjects, Ancient Greece
Battles of macrohistorical importance involving invasions of Europe, common.topic.image, Jacques-Louis David 004
300, common.topic.webpage, m.09ss487
m.04yv151, military.military_command.military_conflict, Battle of Salamis
Leonidas at Thermopylae, visual_art.artwork.art_subject, Leonidas I
Leonidas at Thermopylae, visual_art.artwork.support, Canvas
Battle of Thermopylae, time.event.included_in_event, World War II
Ancient Greece, book.book_subject.works, Thermopylae: The Battle That Changed the World
300, common.topic.webpage, m.094th5_
Battle of Thermopylae, time.event.end_date, -479
Ancient Greece, location.location.events, First Peloponnesian War
Wars of the Delian League, time.event.includes_event, Battle of the Eurymedon
300, common.topic.webpage, m.09ss4hn
Battle of Thermopylae, base.schemastaging.context_name.pronunciation, m.013154b8
m.09ss4pz, common.webpage.topic, 300
Demophilus of Thespiae, common.topic.notable_for, g.12578zvln
Second Persian invasion of Greece, base.culturalevent.event.entity_involved, Xerxes I
Battles of macrohistorical importance involving invasions of Europe, time.event.locations, Toulouse
Battle of Salamis, base.culturalevent.event.entity_involved, Ancient Greece
Second Persian invasion of Greece, base.culturalevent.event.entity_involved, Leonidas I
Muslim conquests, time.event.includes_event, Battle of Toulouse (721)
m.05nnd0c, military.military_combatant_group.conflict, Battle of Plataea
Ionian Revolt, time.event.includes_event, Battle of Ephesus
Leonidas at Thermopylae, visual_art.artwork.period_or_movement, Neoclassicism
m.094h3kl, common.webpage.topic, 300
Battle of Thermopylae, time.event.included_in_event, Battle of Greece
Battle of Thermopylae, base.culturalevent.event.entity_involved, Achaemenid Empire
Battle of Thermopylae, base.culturalevent.event.entity_involved, New Zealand
Greco-Persian Wars, time.event.includes_event, Battle of Lade
Greco-Persian Wars, time.event.includes_event, Battle of Salamis
Battle of Thermopylae, base.culturalevent.event.entity_involved, Leonidas I
The Propylaia to the Athenian Akropolis, book.written_work.subjects, Greece
300, common.topic.webpage, m.09ss4ll
Battle of Thermopylae, film.film_subject.films, Meet the Spartans
Thespiae, military.military_combatant.casualties, m.02whxrr
Battle of Salamis, common.topic.notable_types, Military Conflict
Demophilus of Thespiae, people.person.gender, Male
Persian Expedition of 1796, time.event.locations, Iran
m.094th5_, common.webpage.topic, 300
Battle of Salamis, base.culturalevent.event.entity_involved, Xerxes I
Greco-Persian Wars, time.event.locations, Greece
300, common.topic.webpage, m.0942sc5
Wars of the Diadochi, time.event.locations, Anatolia
300, common.topic.webpage, m.0946h4c
Greece in the making, 1200-479 BC, book.written_work.subjects, Greece
m.0946h4c, common.webpage.topic, 300
Greco-Persian Wars, time.event.includes_event, Battle of Artemisium
Greco-Persian Wars, time.event.includes_event, Battle of Ephesus
m.09ss4fd, common.webpage.topic, 300
Battle of Thermopylae, base.culturalevent.event.entity_involved, Themistocles
m.09ss4pj, common.webpage.topic, 300
Wars of the Delian League, base.culturalevent.event.entity_involved, Artabazos I of Phrygia
Ancient Greece, book.book_subject.works, Greece in the making, 1200-479 BC
Battle of Thermopylae, common.topic.webpage, m.09xtfq8
Achaemenid Empire, location.location.events, Persian Expedition of 1796
Battle of Thermopylae, film.film_subject.films, 300
m.08xfrw8, common.webpage.topic, 300
Battle of Artemisium, base.culturalevent.event.entity_involved, Achaemenid Empire
m.0t56fz5, military.military_combatant_group.conflict, Battle of Thermopylae
300, common.topic.notable_for, g.1257y3nss
Battle of Salamis, time.event.included_in_event, Greco-Persian Wars
Battles of macrohistorical importance involving invasions of Europe, time.event.locations, Constantinople
Battle of Artemisium, base.culturalevent.event.entity_involved, Themistocles
Battle of Thermopylae, visual_art.art_subject.artwork_on_the_subject, Leonidas at Thermopylae
Anatolia, location.location.events, Wars of the Diadochi
m.05nnd0j, military.military_combatant_group.conflict, Battle of Lade
Thermopylae ancient coastline large, common.image.size, m.022pw9_
Ionian Revolt, time.event.includes_event, Battle of Lade
Greco-Persian Wars, common.topic.article, m.01wc2m
Battle of Thermopylae, film.film_subject.films, The 300 Spartans
Battle of Mycale, base.culturalevent.event.entity_involved, Ancient Greece
m.05nn6qt, military.military_combatant_group.conflict, Battle of Thermopylae
m.09ss4l4, common.webpage.topic, 300
300, common.topic.webpage, m.09ss46y
Second Punic War, time.event.includes_event, Battle of the Metaurus
m.02whxrr, military.casualties.military_conflict, Battle of Thermopylae
m.09ss4k8, common.webpage.topic, 300
Thermopylae: The Battle That Changed the World, book.written_work.subjects, Ancient Greece
Thermopylae, common.topic.image, The modern monument in Thermopylae
Leonidas at Thermopylae, visual_art.artwork.art_subject, Battle of Thermopylae
Battle of Artemisium, base.culturalevent.event.entity_involved, Ancient Greece
m.05nnd04, military.military_combatant_group.conflict, Battle of Artemisium
Thermopylae ancient coastline large, common.image.appears_in_topic_gallery, Thermopylae
Battle of Plataea, time.event.included_in_event, Greco-Persian Wars
The wars of the ancient Greeks, book.written_work.subjects, Greece
300, common.topic.webpage, m.09ss4dz
300, common.topic.webpage, m.0945zh3
m.09ss4p2, common.webpage.topic, 300
Greco-Persian Wars, time.event.includes_event, Battle of Salamis in Cyprus
Greece, location.location.events, Battle of Greece
Battle of Thermopylae, military.military_conflict.combatants, m.0t56fz5
Leonidas at Thermopylae, common.topic.image, Jacques-Louis David 004
m.0948hqk, common.webpage.topic, 300
Wars of the Diadochi, time.event.locations, Thrace
m.094cjt9, common.webpage.topic, 300
Battle of Thermopylae, time.event.included_in_event, Battles of macrohistorical importance involving invasions of Europe
m.09ss4kq, common.webpage.topic, 300
Wars of the Delian League, time.event.locations, Greece
Battle of Thermopylae, common.topic.webpage, m.09xj3j1
m.09ss4c0, common.webpage.topic, 300
Battle of Greece, time.event.locations, Greece
Battle of Thermopylae, military.military_conflict.casualties, m.040wgcz
Battles of macrohistorical importance involving invasions of Europe, common.topic.article, m.02pyrq3
Battle of Thermopylae, common.topic.notable_types, Military Conflict
Peloponnesian War, base.culturalevent.event.entity_involved, Classical Athens
m.03z96bp, military.military_combatant_group.combatants, Thespiae
Battle of the Catalaunian Plains, common.topic.notable_types, Military Conflict
300, common.topic.webpage, m.09ss493
Battle of Plataea, base.culturalevent.event.entity_involved, Pausanias
Battles of macrohistorical importance involving invasions of Europe, time.event.includes_event, Siege of Constantinople
Greco-Persian Wars, time.event.includes_event, Battle of the Eurymedon
m.04yvpj9, military.military_combatant_group.combatants, Ancient Thebes
Greco-Persian Wars, time.event.includes_event, Second Persian invasion of Greece
Battles of macrohistorical importance involving invasions of Europe, time.event.includes_event, Battle of Toulouse (721)
Leonidas I, common.topic.image, Leonidas Thermopylae2
m.09ss487, common.webpage.topic, 300
Battle of Thermopylae, military.military_conflict.combatants, m.05nn6qt
Greco-Persian Wars, common.topic.notable_for, g.125b19nn2
Battle of Thermopylae, base.culturalevent.event.entity_involved, Hydarnes
Leonidas at Thermopylae, visual_art.artwork.owners, m.064t2lq
Battle of Thermopylae, military.military_conflict.combatants, m.03z96bp
300, common.topic.webpage, m.09ss4h4
Leonidas at Thermopylae, visual_art.artwork.artist, Jacques-Louis David
Second Punic War, time.event.locations, Ancient Greece
m.0942sc5, common.webpage.topic, 300
300, common.topic.webpage, m.094h3kl
m.09ss4c6, common.webpage.topic, 300
m.05nqs6m, military.military_combatant_group.conflict, Siege of Eretria
Athens, book.book_subject.works, The Propylaia to the Athenian Akropolis
Battle of Artemisium, military.military_conflict.military_personnel_involved, Themistocles
Greco-Persian Wars, time.event.includes_event, Siege of Naxos (499 BC)
300, common.topic.webpage, m.09ss4kq
Arab–Byzantine wars, time.event.locations, North Africa
Siege of Constantinople, time.event.locations, Thrace
Ancient Thebes, military.military_combatant.casualties, m.040wgd7
m.09ss4hn, common.webpage.topic, 300
m.09ss4jv, common.webpage.topic, 300
Battles of macrohistorical importance involving invasions of Europe, time.event.includes_event, Battle of the Catalaunian Plains
Second Persian invasion of Greece, military.military_conflict.combatants, m.05nv9b7
Battle of Artemisium, military.military_conflict.combatants, m.05nnd04
The Archidamian war, book.written_work.subjects, History
Leonidas at Thermopylae, visual_art.artwork.art_genre, History painting
Battle of Thermopylae, military.military_conflict.casualties, m.02whxrr
300, common.topic.image, m.08l4rns
Battle of Salamis, base.culturalevent.event.entity_involved, Themistocles
300, common.topic.webpage, m.09ss47t
Wars of the Delian League, base.culturalevent.event.entity_involved, Artaxerxes I of Persia
The Propylaia to the Athenian Akropolis, book.written_work.subjects, Ancient Greece
Leonidas Thermopylae2, common.image.appears_in_topic_gallery, Leonidas I
m.02whxst, military.military_command.military_conflict, Battle of Thermopylae
300, common.topic.webpage, m.0948hqk
Battle of Thermopylae, base.culturalevent.event.event_type, Military Conflict
300, common.topic.webpage, m.09ss49k

Answer: -479