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 location of the Vietnam War was the subject of the movie "Regret to Inform"? 
Knowledge Triplets: First Indochina War, time.event.locations, Southeast Asia
South Vietnam, location.location.contains, Ap Lo Gom
War in Vietnam (1954-1959), military.military_conflict.commanders, m.0dh6jtq
Laotian Civil War, base.culturalevent.event.entity_involved, South Vietnam
War in Vietnam (1954-1959), time.event.locations, South Vietnam
Vietnam War, common.topic.webpage, m.09xgcz2
m.04ml3lw, military.casualties.combatant, North Vietnam
North Vietnam, location.location.events, Vietnam War
Daniel Reeves, film.cinematographer.film, Regret to Inform
North Vietnam, location.location.events, Vietnamization
Vietnam War, base.culturalevent.event.entity_involved, Pathet Lao
North Vietnamese invasion of Laos, base.culturalevent.event.entity_involved, North Vietnam
Cold War, time.event.locations, Vietnam
Vietnam War, base.culturalevent.event.entity_involved, Creighton Abrams
War in Vietnam, time.event.locations, South Vietnam
Vietnam War, base.fight.subject_of_protest.protests_about_this, Chicano Moratorium
Opposition to United States involvement in the Vietnam War, common.topic.notable_types, Event
Regret to Inform, film.film.directed_by, Barbara Sonneborn
March Against the Vietnam War, base.fight.protest.subject_of_protest, Vietnam War
North Vietnam, location.location.events, Operation Linebacker II
Vietnam, book.book_subject.works, Vietnam
South Vietnam, location.country.languages_spoken, French
m.05v840d, award.award_honor.honored_for, Regret to Inform
North Vietnam, location.location.events, War in Vietnam (1954-1959)
Gia Dinh, location.location.containedby, South Vietnam
The Last Valley: Dien Bien Phu and the French Defeat in Vietnam, book.written_work.subjects, Asia
War in Vietnam, base.culturalevent.event.entity_involved, Communism
Joint warfare in South Vietnam, 1963–69, time.event.included_in_event, Vietnam War
Southeast Asia, book.book_subject.works, Vietnam
m.04kb4kx, military.casualties.combatant, North Vietnam
Vietnam War, common.topic.webpage, m.09wx9cc
Nancy Schiesari, film.cinematographer.film, Regret to Inform
Regret to Inform, media_common.netflix_title.netflix_genres, Biographical Documentaries
Anatomy of a War, book.written_work.subjects, Vietnam
War in Vietnam, base.culturalevent.event.entity_involved, Le Duan
1975 Spring Offensive, time.event.locations, South Vietnam
Todd Boekelheide, film.music_contributor.film, Regret to Inform
Operation Chopper, time.event.locations, North Vietnam
Widow, film.film_subject.films, Regret to Inform
Operation Ivory Coast, time.event.locations, North Vietnam
Hanoi, location.administrative_division.country, Vietnam
Vietnam War, time.event.locations, North Vietnam
Vietnam, location.location.time_zones, Indochina Time Zone
Vietnam War, book.written_work.subjects, Vietnam War
Janet Cole, film.producer.film, Regret to Inform
Vietnam, location.location.containedby, Mainland Southeast Asia
North Vietnam, location.location.events, Operation Rolling Thunder
Regret to Inform, film.film.genre, Documentary film
South Vietnam, location.location.contains, Gia Dinh
Regret to Inform, award.award_winning_work.awards_won, m.0nbmswk
Vietnam War, common.topic.image, Vietnamese village after an attack
The Last Valley: Dien Bien Phu and the French Defeat in Vietnam, book.written_work.subjects, Vietnam War
Lucy Massie Phenix, film.editor.film, Regret to Inform
Dear America: Letters Home from Vietnam, film.film.genre, War film
North Vietnam, common.topic.notable_for, g.12575ynt8
Ho Chi Minh City, location.location.events, 1960 South Vietnamese coup attempt
Center for Asian American Media, film.production_company.films, Regret to Inform
Ho Chi Minh City University of Technology, location.location.containedby, Vietnam
Vietnam, location.country.capital, Hanoi
Vietnam, location.country.administrative_divisions, Quang Binh Province
Regret to Inform, media_common.netflix_title.netflix_genres, Film & Television History
Vietnam War, base.culturalevent.event.entity_involved, Cao Văn Viên
Janet Cole, film.producer.films_executive_produced, Regret to Inform
War in Vietnam (1954-1959), time.event.locations, North Vietnam
Regret to Inform, film.film.production_companies, Sun Fountain Productions
Mainland Southeast Asia, location.location.contains, Vietnam
Vietnam, location.location.events, Vietnam War
Vietnam, location.country.administrative_divisions, Quảng Trị Province
Vietnam War, base.culturalevent.event.entity_involved, Ho Chi Minh
Everything We Had, book.written_work.subjects, Vietnam
Vietnam, book.written_work.subjects, Vietnam War
Vietnam War, base.culturalevent.event.entity_involved, Francoist Spain
Vietnam, book.book_subject.works, Ho
Vietnam War, base.culturalevent.event.entity_involved, Taiwan
War in Vietnam, base.culturalevent.event.entity_involved, South Vietnam
Sino-Vietnamese War, base.culturalevent.event.entity_involved, Vietnam
Pay any price, book.written_work.subjects, Vietnam War
Hanoi, location.location.containedby, Vietnam
Vietnamese village after an attack, common.image.appears_in_topic_gallery, Vietnam War
Vietnam, book.written_work.subjects, Asia
Quảng Trị Province, location.location.containedby, Vietnam
Friendly Fire, film.film.subjects, Vietnam War
Vietnam War, book.written_work.subjects, Vietnam
Sun Fountain Productions, film.production_company.films, Regret to Inform
South Vietnam, location.location.people_born_here, Tran Dinh Truong
North Vietnam, location.location.events, War in Vietnam
South Vietnam, location.location.people_born_here, Phuong Ngo
Sơn Tây, location.location.containedby, Vietnam
Dear America: Letters Home from Vietnam, film.film.country, United States of America
m.09w6h34, common.webpage.topic, Vietnam War
m.05y__y5, common.webpage.topic, Regret to Inform
South Vietnam, common.topic.notable_for, g.125h4ls67
m.0b78mbw, military.military_combatant_group.conflict, Joint warfare in South Vietnam, 1963–69
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, William Westmoreland
Cambodia, location.location.events, Cambodian–Vietnamese War
Vietnam War, time.event.locations, Southeast Asia
Laos, location.location.events, Vietnam War
Vietnam, book.book_subject.works, Everything We Had
m.0gl76j8, film.film_regional_release_date.film, Regret to Inform
Vietnam Veterans Memorial, location.location.containedby, Washington, D.C.
Vietnam, book.book_subject.works, A Rumor of War
Vietnam War, location.location.events, Vietnam
Vietnam National University, Ho Chi Minh City, location.location.containedby, Vietnam
North Vietnam, location.country.official_language, Vietnamese Language
Regret to Inform, common.topic.article, m.04zzdw2
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Le Duan
Vietnam War, base.culturalevent.event.entity_involved, Richard Nixon
September 1964 South Vietnamese coup attempt, time.event.locations, Ho Chi Minh City
Regret to Inform, film.film.edited_by, Lucy Massie Phenix
South Vietnam, location.location.people_born_here, Siu Ta
Ho Chi Minh City, location.location.events, September 1964 South Vietnamese coup attempt
Vietnam War, base.culturalevent.event.entity_involved, Kingdom of Laos
Joint warfare in South Vietnam, 1963–69, military.military_conflict.commanders, m.0b78jlb
Regret to Inform, film.film.produced_by, Janet Cole
Vietnam, book.book_subject.works, The Last Valley: Dien Bien Phu and the French Defeat in Vietnam
North Vietnam, location.location.people_born_here, Hanoi Hannah
Southeast Asia, location.location.events, First Indochina War
Southeast Asia, book.book_subject.works, Vietnam War
Vietnam National University, Ho Chi Minh City, location.location.containedby, Ho Chi Minh City
Regret to Inform, film.film.subjects, Vietnam
Vietnam War, base.newsevents.photographed_event.photograph_s, Burst of Joy
Vietnam War, base.culturalevent.event.entity_involved, Anti-communism
1960 South Vietnamese coup attempt, time.event.locations, Ho Chi Minh City
North Vietnam, common.topic.image, 北ベトナムの位置
Vietnam War, common.topic.webpage, m.09wkmg9
North Vietnam, location.location.events, Battle of Haiphong Harbor
War in Vietnam, common.topic.notable_types, Military Conflict
Vietnam War, common.topic.webpage, m.0b47hsk
Regret to Inform, media_common.netflix_title.netflix_genres, Military Documentaries
Vietnam War, base.culturalevent.event.entity_involved, Khmer Rouge
1963 South Vietnamese coup, time.event.locations, Ho Chi Minh City
Vietnam War, common.topic.image, UH-1combatmission1970
South Vietnam, location.country.official_language, Vietnamese Language
First Indochina War, time.event.locations, North Vietnam
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Viet Cong
South Vietnam, location.location.contains, Van Tuong
Vietnam War, base.culturalevent.event.entity_involved, Lyndon B. Johnson
Regret to Inform, film.film.written_by, Barbara Sonneborn
War in Vietnam, base.culturalevent.event.entity_involved, Ngo Dinh Diem
Regret to Inform, award.award_nominated_work.award_nominations, m.0pd77g5
Vietnam, book.book_subject.works, Vietnam War
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Communism
Hard Hat Riot, base.fight.protest.subject_of_protest, Vietnam War
Self-immolations in protest to the Vietnam War, base.fight.protest.subject_of_protest, Vietnam War
Vietnam War, common.topic.webpage, m.09w6h34
Vietnam War, common.topic.webpage, m.0b481t3
Regret to Inform, film.film.produced_by, Barbara Sonneborn
Regret to Inform, film.film.music, Todd Boekelheide
South Vietnam, military.military_combatant.military_conflicts, m.04fts66
Vietnam War, base.culturalevent.event.entity_involved, Le Duan
Regret to Inform, film.film.runtime, m.052hpbq
Vietnam, location.location.events, Cold War
Battle of Saigon, base.culturalevent.event.entity_involved, South Vietnam
Vietnam, book.written_work.subjects, Vietnam
Regret to Inform, film.film.production_companies, American Documentary, Inc.
Van Tuong, location.location.containedby, South Vietnam
Regret to Inform, film.film.executive_produced_by, Janet Cole
Operation Ivory Coast, base.culturalevent.event.entity_involved, North Vietnam
Vietnam War, base.culturalevent.event.entity_involved, Văn Tiến Dũng
Vietnam, book.book_subject.works, Anatomy of a War
Regret to Inform, film.film.genre, Indie film
Vietnam War, base.culturalevent.event.entity_involved, Nguyễn Cao Kỳ
Buddhist Uprising, time.event.locations, South Vietnam
Vietnam War, common.topic.webpage, m.09y37g1
Barbara Sonneborn, film.producer.film, Regret to Inform
Battle of Haiphong Harbor, base.culturalevent.event.entity_involved, North Vietnam
South Vietnam, location.statistical_region.population, m.0h_3jlb
Vietnam War, base.culturalevent.event.entity_involved, Viet Cong
North Vietnam, location.location.events, Joint warfare in South Vietnam, 1963–69
Regret to Inform, film.film.release_date_s, m.0bqs8vj
North Vietnam, common.topic.article, m.0g979
Vietnam War, book.written_work.subjects, Southeast Asia
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Viet Minh
North Vietnam, location.country.form_of_government, Single-party state
Regret to Inform, film.film.genre, History
Vietnam War, common.topic.webpage, m.09xtw5q
North Vietnam, location.location.events, Operation Pony Express
Aid and Comfort, book.written_work.subjects, Vietnam
Location of Republic of South Vietnam, common.image.appears_in_topic_gallery, South Vietnam
Regret to Inform, common.topic.article, m.0bx8sjn
Laos, location.location.events, Joint warfare in South Vietnam, 1963–69
South Vietnam, location.country.capital, Ho Chi Minh City
North Vietnam, location.country.capital, Hanoi
Vietnam War, base.culturalevent.event.entity_involved, Nguyễn Văn Thiệu
South Vietnam, location.location.contains, Bình Ba
Vietnam War, base.fight.subject_of_protest.protests_about_this, Moratorium to End the War in Vietnam
Operation Flaming Dart, time.event.locations, North Vietnam
Regret to Inform, film.film.genre, Biographical film
Vietnam War, base.culturalevent.event.entity_involved, Nguyễn Hữu Thọ
Barbara Sonneborn, film.writer.film, Regret to Inform
Regret to Inform, film.film.subjects, Vietnam War
Cambodian Civil War, base.culturalevent.event.entity_involved, North Vietnam
Regret to Inform, film.film.production_companies, Center for Asian American Media
Vietnam War, base.fight.subject_of_protest.protests_about_this, March Against the Vietnam War
Regret to Inform, film.film.produced_by, Cara Mertes
1975 Spring Offensive, base.culturalevent.event.entity_involved, North Vietnam
Vietnam War, base.fight.subject_of_protest.protests_about_this, 1971 May Day protests
North Vietnam, location.location.events, Operation Chopper
Vietnam, base.locations.countries.continent, Asia
War in Vietnam, base.culturalevent.event.entity_involved, United States of America
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Anti-communism
South Vietnam, location.country.national_anthem, m.0gm710l
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Kingdom of Laos
Ho Chi Minh City Open University, location.location.containedby, Vietnam
Battle of Saigon, time.event.locations, South Vietnam
A Rumor of War, book.written_work.subjects, Vietnam War
Vietnam, location.country.administrative_divisions, Ho Chi Minh City
South Vietnam, common.topic.image, Trưng cầu dân ý năm 1955 đưa Ngô Đình Diệm lên nắm quyền
Asia, base.locations.continents.countries_within, Vietnam
South Vietnam, location.location.geolocation, m.09dx4xf
Vietnam War, base.fight.subject_of_protest.protests_about_this, Presidio mutiny
Vietnam, common.topic.subjects, Insider Journeys
North Vietnamese invasion of Laos, time.event.included_in_event, Vietnam War
Regret to Inform, film.film.film_festivals, 1999 San Francisco International Film Festival
1963 South Vietnamese coup, time.event.locations, South Vietnam
North Vietnam, location.location.events, Operation End Sweep
Southeast Asia, book.book_subject.works, The Last Valley: Dien Bien Phu and the French Defeat in Vietnam
North Vietnam, location.country.form_of_government, Republic
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, South Vietnam
South Vietnam, location.location.containedby, Southeast Asia
South Vietnam, location.location.people_born_here, Hong Le Webb
Ho Chi Minh City, location.administrative_division.country, Vietnam
First Indochina War, base.culturalevent.event.entity_involved, North Vietnam
Moratorium to End the War in Vietnam, base.fight.protest.subject_of_protest, Vietnam War
Kingdom of Laos, location.location.events, North Vietnamese invasion of Laos
Perils of dominance, book.written_work.subjects, Vietnam War
m.0bqs8vs, film.personal_film_appearance.film, Regret to Inform
Vietnam War, base.fight.subject_of_protest.protests_about_this, Self-immolations in protest to the Vietnam War
Vietnam War, base.fight.subject_of_protest.protests_about_this, Hard Hat Riot
Ho Chi Minh Mausoleum, location.location.containedby, Hanoi
Ho, book.written_work.subjects, Vietnam
Battle of Haiphong Harbor, time.event.locations, North Vietnam
m.04kb4kj, military.casualties.combatant, South Vietnam
m.0nbmswk, award.award_honor.honored_for, Regret to Inform
Vietnam War, base.culturalevent.event.entity_involved, North Korea
South Vietnam, location.location.people_born_here, Nguyễn Sĩ Bình
Presidio mutiny, base.fight.protest.subject_of_protest, Vietnam War
m.0pd77g5, award.award_nomination.nominated_for, Regret to Inform
Vietnam War, common.topic.article, m.07_nr
Vietnam War, common.topic.webpage, m.09w6kz6
Regret to Inform, film.film.edited_by, Ken Schneider
Joint warfare in South Vietnam, 1963–69, military.military_conflict.commanders, m.0c5n9pb
Vietnam, location.country.official_language, Vietnamese Language
Regret to Inform, media_common.netflix_title.netflix_genres, PBS Documentaries
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Võ Nguyên Giáp
Vietnam War, radio.radio_subject.programs_with_this_subject, They Served with Honor
A Rumor of War, book.written_work.subjects, Vietnam
The Last Valley: Dien Bien Phu and the French Defeat in Vietnam, book.written_work.subjects, Southeast Asia
Anatomy of a War, book.written_work.subjects, Vietnam War
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Ho Chi Minh
Vietnam War, common.topic.webpage, m.09w6pvn
Aid and Comfort, book.written_work.subjects, Vietnam War
Regret to Inform, common.topic.notable_for, g.125cqrpz0
Regret to Inform, film.film.personal_appearances, m.0bqs8vz
September 1964 South Vietnamese coup attempt, time.event.locations, South Vietnam
m.0b78jlb, military.military_command.military_conflict, Joint warfare in South Vietnam, 1963–69
Regret to Inform, film.film.release_date_s, m.0gl76j8
Vietnam Veterans Memorial, base.usnationalparks.us_national_park.state, Washington, D.C.
War in Vietnam (1954-1959), time.event.included_in_event, Vietnam War
War in Vietnam, base.culturalevent.event.entity_involved, Ho Chi Minh
Laotian Civil War, base.culturalevent.event.entity_involved, North Vietnam
Joint warfare in South Vietnam, 1963–69, time.event.locations, North Vietnam
Quang Binh Province, location.administrative_division.country, Vietnam
Vietnam War, common.topic.notable_for, g.1258vfs7z
Chicano Moratorium, base.fight.protest.subject_of_protest, Vietnam War
Vietnam War, common.topic.webpage, m.09xwgxs
Vietnam, location.country.form_of_government, Single-party state
Operation Pony Express, time.event.locations, North Vietnam
Joint warfare in South Vietnam, 1963–69, military.military_conflict.commanders, m.0b7915n
Joint warfare in South Vietnam, 1963–69, military.military_conflict.combatants, m.0b78bs8
Vietnam War, common.topic.webpage, m.09wmlvm
1975 Spring Offensive, base.culturalevent.event.entity_involved, South Vietnam
Southeast Asia, location.location.contains, South Vietnam
Joint warfare in South Vietnam, 1963–69, time.event.locations, Laos
Battle of Haiphong Harbor, time.event.included_in_event, Vietnam War
Vietnam, location.country.administrative_divisions, Hanoi
South Vietnam, location.location.people_born_here, Jane Luu
m.0b7kyw7, award.award_nomination.nominated_for, Regret to Inform
South Vietnam, location.location.people_born_here, David Pham
m.0bqs8vz, film.personal_film_appearance.film, Regret to Inform
North Vietnam, location.location.geolocation, m.0wmhy7k
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Hoàng Văn Thái
m.0b78bs8, military.military_combatant_group.conflict, Joint warfare in South Vietnam, 1963–69
Vietnam War, common.topic.webpage, m.09xfyqk
Vietnam, location.country.administrative_divisions, Quảng Ngãi Province
Cambodian–Vietnamese War, time.event.locations, Cambodia
Southeast Asia, location.location.events, Vietnam War
Regret to Inform, film.film.starring, m.0h108wn
Vietnam War, base.culturalevent.event.entity_involved, Trần Văn Trà
Cara Mertes, film.producer.film, Regret to Inform
Quảng Ngãi Province, location.administrative_division.country, Vietnam
m.0h108wn, film.performance.film, Regret to Inform
Vietnam War, base.culturalevent.event.entity_involved, China
South Vietnam, common.topic.image, Location of Republic of South Vietnam
m.0b7915n, military.military_command.military_conflict, Joint warfare in South Vietnam, 1963–69
Regret to Inform, film.film.language, English Language
War in Vietnam, base.culturalevent.event.entity_involved, Anti-communism
Bình Ba, location.location.containedby, South Vietnam
War in Vietnam (1954-1959), common.topic.notable_types, Military Conflict
Vietnam War, common.topic.webpage, m.09xm1xv
Vietnam War, base.culturalevent.event.entity_involved, Communism
Phan Rang–Tháp Chàm, location.location.containedby, Vietnam
Ho Chi Minh City, location.location.events, 1963 South Vietnamese coup
Vietnam War, base.culturalevent.event.entity_involved, Cuba
North Vietnam, common.topic.image, North vietnam
Quảng Ngãi Province, location.location.containedby, Vietnam
Regret to Inform, film.film.subjects, Vietnam
Moratorium to End the War in Vietnam, base.vietnamwar.protest.organizations_involved, Congress for International Co-operation and Disarmament
South Vietnam, location.country.form_of_government, Republic
Vietnam War, base.culturalevent.event.entity_involved, Nguyễn Văn Linh
North Vietnamese invasion of Laos, time.event.locations, Kingdom of Laos
Ho, book.written_work.subjects, Vietnam War
South Vietnam, location.location.people_born_here, Ngô Đình Lệ Quyên
South Vietnam, location.location.people_born_here, Hubert Vo
Quang Binh Province, location.location.containedby, Vietnam
Regret to Inform, common.topic.webpage, m.05y__y5
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Communism
1971 May Day protests, base.fight.protest.subject_of_protest, Vietnam War
Regret to Inform, film.film.personal_appearances, m.0bqs8vs
Sơn Tây, location.location.containedby, Hanoi
Cambodian Civil War, base.culturalevent.event.entity_involved, South Vietnam
Ho Chi Minh City, base.biblioness.bibs_location.country, Vietnam
War in Vietnam (1954-1959), time.event.included_in_event, Cold War
Opposition to United States involvement in the Vietnam War, time.event.includes_event, Kent State shootings
Regret to Inform, film.film.cinematography, Nancy Schiesari
South Vietnam, common.topic.article, m.0g8c4
Operation Rolling Thunder, time.event.locations, North Vietnam
Vietnam War, cvg.computer_game_subject.games, g.122n61_3
365 Days, book.written_work.subjects, Vietnam War
m.09wkmg9, common.webpage.topic, Vietnam War
Vietnam War, time.event.locations, Cambodia
Ho Chi Minh Mausoleum, location.location.containedby, Vietnam
Operation Linebacker, time.event.locations, North Vietnam
Barbara Sonneborn, film.director.film, Regret to Inform
War in Vietnam, base.culturalevent.event.entity_involved, Viet Cong
First Indochina War, base.culturalevent.event.entity_involved, Võ Nguyên Giáp
Ho Chi Minh City, location.location.events, Battle of Saigon
Sino-Vietnamese War, time.event.locations, Vietnam
They Served with Honor, radio.radio_program.subjects, Vietnam War
Regret to Inform, film.film.produced_by, Lisa Heller
South Vietnam, location.location.people_born_here, Nguyễn Xuân Ngãi
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Anti-communism
Vietnamization, time.event.locations, North Vietnam
Regret to Inform, film.film.genre, Black-and-white
Hanoi, base.biblioness.bibs_location.country, Vietnam
War in Vietnam (1954-1959), military.military_conflict.combatants, m.09j3ckd
South Vietnam, location.statistical_region.population, m.0h_3jlj
Vietnam, book.written_work.subjects, Southeast Asia
Regret to Inform, media_common.netflix_title.netflix_genres, Documentary film
Vietnam, location.location.containedby, Asia
American Documentary, Inc., film.production_company.films, Regret to Inform
Vietnam War, base.culturalevent.event.entity_involved, Australia
Hanoi, location.location.time_zones, Indochina Time Zone
Vietnam War, base.culturalevent.event.entity_involved, Ngo Dinh Diem
Regret to Inform, common.topic.notable_types, Award-Winning Work
North Vietnam, location.location.events, Operation Linebacker
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Nguyễn Văn Thiệu
Kim Lien, location.location.containedby, Vietnam
m.09xtw5q, common.webpage.topic, Vietnam War
Operation Chopper, time.event.locations, South Vietnam
Joint warfare in South Vietnam, 1963–69, common.topic.notable_types, Military Conflict
Vietnam War, book.written_work.subjects, United States of America
Ap Lo Gom, location.location.containedby, South Vietnam
Vietnam, location.location.events, Sino-Vietnamese War
Vietnam War, base.culturalevent.event.entity_involved, Thailand
North Vietnam, location.location.events, First Indochina War
Vietnam Chronicles: The Abrams Tapes, 1968-1972, book.written_work.subjects, Vietnam War
Ken Schneider, film.editor.film, Regret to Inform
m.02h77gp, military.casualties.combatant, South Vietnam
Regret to Inform, award.award_nominated_work.award_nominations, m.0b7kyw7
Cambodia, location.location.events, Vietnam War
Vietnam War, common.topic.webpage, m.0b4887b
Vietnam War, time.event.locations, South Vietnam
m.04kb4l7, military.casualties.combatant, North Vietnam
Joint warfare in South Vietnam, 1963–69, military.military_conflict.combatants, m.0b78mbw
Regret to Inform, film.film.genre, War film
Vietnam War, base.culturalevent.event.entity_involved, William Westmoreland
Vietnam War, base.culturalevent.event.entity_involved, Khmer Republic
North Vietnam, location.location.events, Operation Pierce Arrow
Marriage & Commitment, film.film_genre.films_in_this_genre, Regret to Inform
Emiko Omori, film.cinematographer.film, Regret to Inform
m.052hpbq, film.film_cut.film, Regret to Inform
Vietnam War, time.event.included_in_event, Indochina Wars
North Vietnam, location.location.events, Operation Flaming Dart
Vietnam, book.written_work.subjects, United States of America
War in Vietnam (1954-1959), base.culturalevent.event.entity_involved, Ngo Dinh Diem
Regret to Inform, film.film.country, United States of America
Vietnam War, time.event.locations, Vietnam
m.0c5n9pb, military.military_command.military_conflict, Joint warfare in South Vietnam, 1963–69
m.02h77fs, military.casualties.combatant, South Vietnam
Vietnam War, base.culturalevent.event.entity_involved, South Vietnam
Regret to Inform, film.film.subjects, Widow
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Cao Văn Viên
1960 South Vietnamese coup attempt, time.event.locations, South Vietnam
Joint warfare in South Vietnam, 1963–69, time.event.included_in_event, Cold War
Regret to Inform, award.award_winning_work.awards_won, m.05v840d
Battle of Saigon, time.event.locations, Ho Chi Minh City
Vietnam: A Television History, tv.tv_program.genre, War film
m.0bqs8vj, film.film_regional_release_date.film, Regret to Inform
Operation Linebacker II, time.event.locations, North Vietnam
Vietnam War, base.culturalevent.event.entity_involved, North Vietnam
Regret to Inform, film.film.cinematography, Daniel Reeves
Vietnam, film.film_subject.films, Regret to Inform
Regret to Inform, media_common.netflix_title.netflix_genres, Indie Documentaries
Southeast Asia, location.location.events, Indochina Wars
South Vietnam, location.location.people_born_here, Nathan Pham
Vietnam War, base.culturalevent.event.entity_involved, Hoàng Văn Thái
Regret to Inform, film.film.genre, Marriage & Commitment
Joint warfare in South Vietnam, 1963–69, base.culturalevent.event.entity_involved, Pathet Lao
South Vietnam, location.location.people_born_here, Andrew Lam
Vietnam War, book.written_work.subjects, History
Insider Journeys, common.topic.subject_of, Vietnam
Indochina Wars, time.event.locations, Southeast Asia
North Vietnam, common.topic.image, LocationNorthVietnam
Everything We Had, book.written_work.subjects, Vietnam War
m.09j4462, military.military_combatant_group.combatants, South Vietnam
North Vietnam, location.location.events, Operation Ivory Coast
The Last Valley: Dien Bien Phu and the French Defeat in Vietnam, book.written_work.subjects, Vietnam
Lisa Heller, film.producer.film, Regret to Inform
South Vietnam, location.country.currency_used, South Vietnamese đồng
War in Vietnam, time.event.locations, North Vietnam
Joint warfare in South Vietnam, 1963–69, time.event.locations, South Vietnam
The Last Valley: Dien Bien Phu and the French Defeat in Vietnam, book.written_work.subjects, History
Regret to Inform, film.film.cinematography, Emiko Omori
Vietnam War, book.written_work.subjects, Asia
Ho Chi Minh City, location.location.containedby, Vietnam
First Indochina War, base.culturalevent.event.entity_involved, Ho Chi Minh
Vietnam War, base.culturalevent.event.entity_involved, Võ Nguyên Giáp
North Vietnamese invasion of Laos, common.topic.image, Viangchan1
Vietnam War, time.event.locations, Laos

Answer: Vietnam