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: Which brother of JFK spoke about assassination of Martin Luther King Jr? 
Knowledge Triplets: John F. Kennedy, film.film.subjects, Thirteen Days
John F. Kennedy, people.person.education, m.0125s3s2
John F. Kennedy, people.person.children, Patrick Bouvier Kennedy
Rose Kennedy, people.person.children, Robert F. Kennedy
On November 22, 1963, Kennedy was assassinated as he and his wife drove through Dallas, Texas., base.kwebbase.kwsentence.dates, m.0c0zkjd
Martin Luther King, Jr., common.topic.notable_types, Author
John F. Kennedy, base.reviews.review.mentions, Countdown of 10 Amazing Moments from the Year 2011: No. 9 Belafonte's New Song
Assassination of John F. Kennedy, book.book_subject.works, The killing of a president : the complete photographic record of the JFK Assassination, the conspiracy and the cover-up
Robert F. Kennedy, event.public_speaker.speeches_or_presentations, m.05rr6k_
John F. Kennedy, common.topic.webpage, m.0b6rdfq
John F. Kennedy, freebase.valuenotation.is_reviewed, Gender
John F. Kennedy Jr., people.person.parents, John F. Kennedy
Martin Luther King, Sr., symbols.name_source.namesakes, Martin Luther King, Jr.
m.05rrkys, event.speech_or_presentation.speaker_s, John F. Kennedy
m.05rr6k_, event.public_speaker.speeches_or_presentations, Robert F. Kennedy
Assassination, people.deceased_person.cause_of_death, Robert F. Kennedy
The JFK assassination, book.written_work.subjects, John F. Kennedy
JFK and LBJ, book.written_work.subjects, United States of America
Martin Luther King, Jr., freebase.valuenotation.is_reviewed, Cause of death
John F. Kennedy, freebase.valuenotation.is_reviewed, Country of nationality
John F. Kennedy, people.person.education, m.0s94p54
John F. Kennedy, freebase.valuenotation.is_reviewed, Place of birth
John F. Kennedy, freebase.valuenotation.is_reviewed, Place of death
Martin Luther King, Jr., freebase.valuenotation.is_reviewed, Place of death
Brookline, people.person.place_of_birth, Robert F. Kennedy
John F. Kennedy, people.person.education, m.0125d08t
The Papers of Martin Luther King, Jr., Volume VI: Advocate of the Social Gospel, September 1948 – March 1963, book.written_work.original_language, English Language
Assassination of John F. Kennedy, book.book_subject.works, Four Days in November
Martin Luther King, Jr., freebase.valuenotation.is_reviewed, Place of birth
Martin Luther King, Jr. National Historic Site, people.place_of_interment.interred_here, Martin Luther King, Jr.
The killing of a president : the complete photographic record of the JFK Assassination, the conspiracy and the cover-up, common.topic.notable_types, Book
John F. Kennedy, people.person.children, John F. Kennedy Jr.
Arlington National Cemetery, people.deceased_person.place_of_burial, Robert F. Kennedy
Martin Luther King, Jr., freebase.valuenotation.is_reviewed, Spouse (or domestic partner)
Country of nationality, freebase.valuenotation.is_reviewed, Robert F. Kennedy
John F. Kennedy, people.person.education, m.0127txc2
[JFK], music.recording.contributions, m.013dzn4r
John F. Kennedy, book.book_subject.works, The Kennedy Assassination Tapes
John F. Kennedy Jr., freebase.valuenotation.has_no_value, Children
John F. Kennedy, people.person.sibling_s, m.03lfq4h
John F. Kennedy, base.kwebbase.kwtopic.connections_to, lee harvey oswald allegedly assassinated john fitzgerald kennedy
John F. Kennedy Jr., people.person.profession, Writer
JFK in Ireland, common.topic.notable_types, Book
Martin Luther King, Jr. National Historic Site, common.topic.notable_types, Museum
Martin Luther King, Jr., book.book_subject.works, The Papers of Martin Luther King, Jr., Volume VI: Advocate of the Social Gospel, September 1948 – March 1963
Forty ways to look at JFK, book.written_work.subjects, History of the United States
Kennedy family, people.family.members, Robert F. Kennedy
John F. Kennedy, people.person.education, m.0125tzqv
John F. Kennedy Speech, common.topic.notable_for, g.11b75r8d38
Martin Luther King III, symbols.namesake.named_after, Martin Luther King, Jr.
On November 22, 1963, Kennedy was assassinated as he and his wife drove through Dallas, Texas., base.kwebbase.kwsentence.next_sentence, Lee Harvey Oswald, a young ex-Marine with links to the Soviet Union, was arrested.
John F. Kennedy, people.person.sibling_s, m.03hs9fc
The JFK assassination, common.topic.notable_types, Book
Assassination of Martin Luther King, Jr., time.event.locations, National Civil Rights Museum
The Papers of Martin Luther King, Jr., Volume VI: Advocate of the Social Gospel, September 1948 – March 1963, book.written_work.subjects, Martin Luther King, Jr.
Robert F. Kennedy's speech on the assassination of Martin Luther King, Jr., event.presented_work.performances, m.05rr6k_
Martin Luther King, Jr. National Historic Site, symbols.namesake.named_after, Martin Luther King, Jr.
JFK wants to know, common.topic.notable_types, Book
Two days later, Oswald was shot and killed while in police custody by Jack Ruby, a nightclub owner., base.kwebbase.kwsentence.kwtopic, John F. Kennedy
The faith of JFK, common.topic.notable_types, Book
John F. Kennedy, freebase.valuenotation.is_reviewed, Date of birth
Lee Harvey Oswald, a young ex-Marine with links to the Soviet Union, was arrested., base.kwebbase.kwsentence.contains_connections, john fitzgerald kennedy allegedly assassinated by lee harvey oswald
John F. Kennedy, people.person.education, m.03lll60
m.0b48xzc, common.webpage.resource, “American Adulterer” Author Jed Mercurio on JFK’s Personal Life, Sexual Affairs
Michael Eric Dyson, book.author.works_written, April 4, 1968: Martin Luther King, Jr.'s Death and How it Changed America
John F. Kennedy, book.book_subject.works, JFK in Ireland
Martin Luther King, Jr., people.person.nationality, United States of America
Kennedy family, people.family.members, Joseph P. Kennedy, Sr.
John F. Kennedy, people.deceased_person.place_of_burial, Arlington National Cemetery
In Vienna, in June, 1961, Kennedy had an unproductive meeting with Soviet Prime Minister Krushchev., base.kwebbase.kwsentence.dates, m.0c0zkdz
John F. Kennedy, people.person.education, m.035j_7r
JFK in Ireland, common.topic.notable_for, g.1258hxpfs
Catholicism, people.person.religion, Robert F. Kennedy
Martin Luther King, Jr., freebase.valuenotation.is_reviewed, Gender
m.03hs9g8, government.politician.government_positions_held, Robert F. Kennedy
john fitzgerald kennedy allegedly assassinated by lee harvey oswald, base.kwebbase.kwconnection.subject, John F. Kennedy
Text and Meaning Series, common.topic.subjects, Martin Luther King, Jr.
John F. Kennedy, common.topic.webpage, m.09x5n2n
John F. Kennedy Jr., people.person.religion, Catholicism
lee harvey oswald allegedly assassinated john fitzgerald kennedy, base.kwebbase.kwconnection.relation, allegedly assassinated
John F. Kennedy, base.americancomedy.impersonated_celebrity.impersonated_by, Rich Little
On November 22, 1963, Kennedy was assassinated as he and his wife drove through Dallas, Texas., base.kwebbase.kwsentence.kwtopic, John F. Kennedy
Forty ways to look at JFK, book.written_work.subjects, John F. Kennedy
Robert F. Kennedy, people.person.sibling_s, m.03hs9fc
Lee Harvey Oswald, a young ex-Marine with links to the Soviet Union, was arrested., base.kwebbase.kwsentence.previous_sentence, On November 22, 1963, Kennedy was assassinated as he and his wife drove through Dallas, Texas.
John F. Kennedy, book.author.works_written, The wisdom of JFK
JFK wants to know, book.book.editions, JFK wants to know: memos from the President's office, 1961-1963
m.05r7b2w, event.speech_or_presentation.speaker_s, John F. Kennedy
Martin Luther King, Jr., symbols.name_source.namesakes, Martin Luther King, Jr. National Historic Site
John F. Kennedy, event.public_speaker.speeches_or_presentations, m.05r7b2w
Place of birth, freebase.valuenotation.is_reviewed, Robert F. Kennedy
John F. Kennedy Jr., people.person.parents, Jacqueline Kennedy Onassis
Male, people.person.gender, Robert F. Kennedy
John F. Kennedy, common.topic.webpage, m.0b46nf9
John F. Kennedy, book.book_subject.works, Forty ways to look at JFK
Martin Luther King, Jr., symbols.namesake.named_after, Martin Luther King, Sr.
John F. Kennedy, book.book_subject.works, JFK and LBJ
Forty ways to look at JFK, book.written_work.subjects, United States of America
Joseph P. Kennedy, Jr., people.person.sibling_s, m.03lfptc
John F. Kennedy Speech, music.recording.artist, John F. Kennedy
m.05rr6k_, event.speech_or_presentation.speaker_s, Robert F. Kennedy
Assassination of John F. Kennedy, base.culturalevent.event.entity_involved, Lee Harvey Oswald
Assassination of Martin Luther King, Jr., common.topic.image, Martin Luther King Jr NYWTS
Date of birth, freebase.valuenotation.is_reviewed, Robert F. Kennedy
JFK in Ireland, book.written_work.author, Ryan Tubridy
JFK and LBJ, book.written_work.subjects, Late 20th Century
John F. Kennedy, event.public_speaker.speeches_or_presentations, m.0ypz1mv
Lee Harvey Oswald, base.kwebbase.kwtopic.connections_to, john fitzgerald kennedy allegedly assassinated by lee harvey oswald
John F. Kennedy, people.person.sibling_s, m.03lfpt2
Joseph P. Kennedy, Sr., people.person.children, Jean Kennedy Smith
JFK, film.film.subjects, John F. Kennedy
The wisdom of JFK, book.written_work.part_of_series, The Wisdom of W.E.B. Du Bois
Lee Harvey Oswald, base.kwebbase.kwtopic.connections_from, lee harvey oswald allegedly assassinated john fitzgerald kennedy
JFK wants to know, book.written_work.author, John F. Kennedy
Place of death, freebase.valuenotation.is_reviewed, Robert F. Kennedy
The faith of JFK, book.written_work.author, John F. Kennedy
Martin Luther King, Sr., people.person.children, Martin Luther King, Jr.
Parents, freebase.valuenotation.is_reviewed, Robert F. Kennedy
John F. Kennedy, people.person.profession, Politician
Joseph P. Kennedy, Jr., people.person.nationality, United States of America
John F. Kennedy, government.political_appointer.appointees, m.03hs9g8
Martin Luther King, Sr., people.person.nationality, United States of America
Joseph P. Kennedy, Jr., people.person.religion, Catholicism
John F. Kennedy, base.crime.crime_victim.crime_type, Assassination
Martin Luther King, Jr., symbols.name_source.namesakes, Martin Luther King Middle School
Forty ways to look at JFK, book.written_work.subjects, Late 20th Century
Martin Luther King, Jr., influence.influence_node.influenced_by, Henry David Thoreau
Martin Luther King, Jr., people.person.children, Martin Luther King III
m.03lfq3_, people.sibling_relationship.sibling, John F. Kennedy
John F. Kennedy, common.topic.webpage, m.0b48xzc
Martin Luther King, Sr., people.deceased_person.cause_of_death, heart attack
The humor of JFK, common.topic.notable_for, g.125cjy15q
Joseph P. Kennedy, Jr., people.person.parents, Joseph P. Kennedy, Sr.
The Papers of Martin Luther King, Jr., Volume VI: Advocate of the Social Gospel, September 1948 – March 1963, book.written_work.author, Martin Luther King, Jr.
Rich Little, base.americancomedy.impersonated_celebrity.impersonated_by, Robert F. Kennedy
John F. Kennedy Jr., people.person.nationality, United States of America
John F. Kennedy, freebase.valuenotation.is_reviewed, Date of death
John F. Kennedy Jr., people.person.gender, Male
John F. Kennedy, people.person.education, m.0s94pc9
John F. Kennedy, base.kwebbase.kwtopic.connections_from, john fitzgerald kennedy allegedly assassinated by lee harvey oswald
The humor of JFK, book.book.editions, The humor of JFK
Gender, freebase.valuenotation.is_reviewed, Robert F. Kennedy
JFK Remembered: 50 Years Later, film.film.personal_appearances, m.0wrtwf8
John F. Kennedy, people.person.sibling_s, m.03lfq3_
April 4, 1968: Martin Luther King, Jr.'s Death and How it Changed America, book.book.editions, April 4, 1968: Martin Luther King, Jr.'s Death and How it Changed America
John F. Kennedy Speech, music.recording.tracks, John F. Kennedy Speech
John F. Kennedy, event.public_speaker.speeches_or_presentations, m.05rrkys
Martin Luther King Jr NYWTS, common.image.appears_in_topic_gallery, Assassination of Martin Luther King, Jr.
JFK wants to know, common.topic.notable_for, g.1254_81q8
Writer, people.person.profession, Robert F. Kennedy
John F. Kennedy, people.person.sibling_s, m.03lfqsd
World War II, military.military_person.participated_in_conflicts, Robert F. Kennedy
Martin Luther King, Jr., people.deceased_person.place_of_death, Memphis
Kennedy family, people.family.members, John F. Kennedy Jr.
The Wisdom of W.E.B. Du Bois, book.literary_series.works_in_this_series, The wisdom of JFK
Martin Luther King, Jr., freebase.valuenotation.is_reviewed, Parents
m.05rr6k_, event.speech_or_presentation.presented_work, Robert F. Kennedy's speech on the assassination of Martin Luther King, Jr.
John F. Kennedy, book.author.works_written, The uncommon wisdom of JFK
Martin Luther King, Jr., common.topic.image, Martin Luther King Jr NYWTS
Martin Luther King III, freebase.valuenotation.is_reviewed, Date of birth
Joseph P. Kennedy, Sr., people.person.children, Ted Kennedy
m.05rr6k_, event.speech_or_presentation.speech_topic, Assassination of Martin Luther King, Jr.
John F. Kennedy, people.person.education, m.0123x2k3
John F. Kennedy, people.person.sibling_s, m.03lfptc
The JFK assassination, book.written_work.subjects, Assassination of John F. Kennedy
April 4, 1968: Martin Luther King, Jr.'s Death and How it Changed America, book.book.editions, April 4, 1968
Assassination of Martin Luther King, Jr., event.speech_topic.speeches_or_presentations_on_this_topic, m.05rr6k_
Assassination of Martin Luther King, Jr., common.topic.notable_types, Event
The killing of a president : the complete photographic record of the JFK Assassination, the conspiracy and the cover-up, book.written_work.subjects, United States of America
Assassination of John F. Kennedy, base.crime.crime.victim_s, John F. Kennedy
John F. Kennedy, base.activism.activist.area_of_activism, Anti-communism
m.03lfq4h, people.sibling_relationship.sibling, John F. Kennedy
Martin Luther King, Jr., freebase.valuenotation.is_reviewed, Date of death
John F. Kennedy, people.person.education, m.0n0y0g0
lee harvey oswald allegedly assassinated john fitzgerald kennedy, base.kwebbase.kwconnection.subject, Lee Harvey Oswald
Assassination of Martin Luther King, Jr., book.book_subject.works, April 4, 1968: Martin Luther King, Jr.'s Death and How it Changed America
John F. Kennedy, people.person.education, m.0125n7tg
The wisdom of JFK, common.topic.notable_for, g.12582gg48
United States of America, people.person.nationality, Robert F. Kennedy
Martin Luther King, Jr., influence.influence_node.influenced, Felix Dodds
April 4, 1968: Martin Luther King, Jr.'s Death and How it Changed America, book.written_work.author, Michael Eric Dyson
John F. Kennedy, common.topic.image, JFK portrait
The uncommon wisdom of JFK, common.topic.notable_for, g.125bwr5_m
John F. Kennedy Speech, common.topic.notable_types, Musical Recording
JFK and LBJ, common.topic.notable_types, Book
Assassination of John F. Kennedy, book.book_subject.works, Live by the sword
John F. Kennedy, base.crime.crime_victim.crime, Assassination of John F. Kennedy
JFK: BREAKING THE NEWS, film.film.language, English Language
John F. Kennedy, people.person.parents, Joseph P. Kennedy, Sr.
m.0_t8tdg, film.personal_film_appearance.film, JFK: BREAKING THE NEWS
JFK wants to know, freebase.valuenotation.is_reviewed, Date of first publication
Martin Luther King III, people.person.ethnicity, African American
Joseph P. Kennedy, Jr., people.person.gender, Male
m.02_wjwf, people.sibling_relationship.sibling, John F. Kennedy
John F. Kennedy, base.crime.crime_victim.crime_type, Assassination
m.0wrtwf8, film.personal_film_appearance.film, JFK Remembered: 50 Years Later
JFK, film.film.country, United States of America
Memphis, location.location.events, Assassination of Martin Luther King, Jr.
April 4, 1968: Martin Luther King, Jr.'s Death and How it Changed America, common.topic.notable_for, g.125595chd
Date of death, freebase.valuenotation.is_reviewed, Robert F. Kennedy
Assassination of Martin Luther King, Jr., common.topic.article, m.03hm37x
Assassination of John F. Kennedy, common.topic.notable_types, Event
The faith of JFK, common.topic.notable_for, g.1259536by
John F. Kennedy, common.topic.webpage, m.09y460p
lee harvey oswald allegedly assassinated john fitzgerald kennedy, base.kwebbase.kwconnection.other, John F. Kennedy
John F. Kennedy, common.topic.webpage, m.09y6s4p
JFK and LBJ, book.written_work.subjects, History of the United States
[JFK], common.topic.notable_types, Musical Recording
John F. Kennedy, film.film_subject.films, JFK
Martin Luther King, Sr., common.topic.notable_types, Deceased Person
Henry David Thoreau, influence.influence_node.influenced, Martin Luther King, Jr.
Martin Luther King, Jr., symbols.name_source.namesakes, Martin Luther King III
Felix Dodds, influence.influence_node.influenced_by, Martin Luther King, Jr.
Martin Luther King, Jr., people.person.profession, Humanitarian
John F. Kennedy, people.person.nationality, United States of America
John F. Kennedy, freebase.valuenotation.is_reviewed, Parents
Martin Luther King, Jr., people.person.ethnicity, African American
Assassination of John F. Kennedy, book.book_subject.works, The Kennedy Assassination Tapes
Frame 313: The JFK Assassination Theories, film.film.personal_appearances, m.0yl7g7g
John F. Kennedy, people.person.education, m.0s94p0_
Joseph P. Kennedy, Sr., people.person.children, John F. Kennedy
m.0yl7g7g, film.personal_film_appearance.film, Frame 313: The JFK Assassination Theories
Assassination of John F. Kennedy, film.film_subject.films, Films from the Sixth Floor
JFK in Ireland, book.written_work.original_language, English Language
The killing of a president : the complete photographic record of the JFK Assassination, the conspiracy and the cover-up, book.written_work.subjects, Late 20th Century
JFK in Ireland, common.topic.article, m.0fphb9v
John F. Kennedy, book.author.works_written, The faith of JFK
John F. Kennedy, military.military_person.participated_in_conflicts, World War II
The humor of JFK, book.written_work.author, John F. Kennedy
April 4, 1968: Martin Luther King, Jr.'s Death and How it Changed America, book.written_work.subjects, Assassination of Martin Luther King, Jr.
john fitzgerald kennedy allegedly assassinated by lee harvey oswald, base.kwebbase.kwconnection.other, Lee Harvey Oswald
Martin Luther King, Sr., people.person.gender, Male
Joseph P. Kennedy, Jr., people.family_member.family, Kennedy family
Martin Luther King, Jr., base.activism.activist.area_of_activism, Anti-Apartheid
JFK, film.film.subjects, Assassination of John F. Kennedy
Martin Luther King, Jr., base.activism.activist.area_of_activism, Civil and political rights
John F. Kennedy, people.person.profession, Writer
Anti-communism, base.activism.activist.area_of_activism, Robert F. Kennedy
Robert F. Kennedy, people.person.parents, Joseph P. Kennedy, Sr.
“American Adulterer” Author Jed Mercurio on JFK’s Personal Life, Sexual Affairs, common.resource.annotations, m.0b48xzc
John-F.-Kennedy-Platz, common.topic.image, Plaque commemorating Kennedy's speech next to the front entrance of Rathaus Schöneberg
The JFK assassination, book.written_work.subjects, History of the United States
Thirteen Days, film.film_subject.films, Robert F. Kennedy
John F. Kennedy Jr., people.family_member.family, Kennedy family
Martin Luther King, Jr., freebase.valuenotation.is_reviewed, Country of nationality
Martin Luther King, Jr., people.person.gender, Male
John F. Kennedy, people.person.gender, Male
John F. Kennedy, people.deceased_person.cause_of_death, Assassination
John F. Kennedy, book.author.works_written, The humor of JFK
JFK Remembered: 50 Years Later, film.film.country, United States of America
Martin Luther King III, people.person.nationality, United States of America
Zapruder film, film.film.subjects, Assassination of John F. Kennedy
m.07ydn0q, people.sibling_relationship.sibling, John F. Kennedy Jr.
John F. Kennedy, book.book_subject.works, The killing of a president : the complete photographic record of the JFK Assassination, the conspiracy and the cover-up
The killing of a president : the complete photographic record of the JFK Assassination, the conspiracy and the cover-up, book.written_work.subjects, Assassination of John F. Kennedy
The JFK assassination, book.written_work.subjects, United States of America
John F. Kennedy, people.person.parents, Rose Kennedy
Martin Luther King Jr NYWTS, common.image.appears_in_topic_gallery, Martin Luther King, Jr.
John F. Kennedy, people.family.members, Kennedy family
Assassination of John F. Kennedy, book.book_subject.works, The JFK assassination
John F. Kennedy, people.person.education, m.04kr2n0
John F. Kennedy, common.topic.webpage, m.0b46sw8
John F. Kennedy, book.author.works_written, JFK wants to know
JFK portrait, common.image.appears_in_topic_gallery, John F. Kennedy
Assassination of John F. Kennedy, base.newsevents.videotaped_event.footage, Zapruder film
John F. Kennedy, people.person.place_of_birth, Brookline
Assassination of Martin Luther King, Jr., common.topic.notable_for, g.125fnc1ss
The uncommon wisdom of JFK, book.written_work.author, John F. Kennedy
Martin Luther King, Jr., base.crime.crime_victim.crime_type, Assassination
john fitzgerald kennedy allegedly assassinated by lee harvey oswald, base.kwebbase.kwconnection.sentence, Lee Harvey Oswald, a young ex-Marine with links to the Soviet Union, was arrested.
John F. Kennedy, people.person.education, m.04yzw40
Assassination of Martin Luther King, Jr., base.culturalevent.event.entity_involved, James Earl Ray
National Civil Rights Museum, location.location.events, Assassination of Martin Luther King, Jr.
Assassination of John F. Kennedy, common.topic.subject_of, Text and Meaning in Robert Frost's \"Dedication: For John F. Kennedy\"
JFK, media_common.netflix_title.netflix_genres, Biography
The JFK assassination, book.written_work.subjects, Late 20th Century
John F. Kennedy, symbols.name_source.namesakes, Assassination of John F. Kennedy
Martin Luther King Jr NYWTS, common.image.size, m.03qvlk8
Martin Luther King, Jr., people.deceased_person.place_of_burial, Martin Luther King, Jr. National Historic Site
Martin Luther King, Jr., freebase.valuenotation.is_reviewed, Date of birth
JFK portrait, common.image.size, m.0kl96j
April 4, 1968: Martin Luther King, Jr.'s Death and How it Changed America, common.topic.notable_types, Book
The humor of JFK, common.topic.notable_types, Book
John F. Kennedy Jr., people.person.place_of_birth, Washington, D.C.
Martin Luther King, Jr., book.author.works_written, The Papers of Martin Luther King, Jr., Volume VI: Advocate of the Social Gospel, September 1948 – March 1963
Assassination of Martin Luther King, Jr., event.speech_topic.speeches_or_presentations_on_this_topic, m.05rr6k_
John F. Kennedy, people.person.parents, Joseph P. Kennedy, Sr.
m.03hs9fc, people.sibling_relationship.sibling, Robert F. Kennedy
April 4, 1968: Martin Luther King, Jr.'s Death and How it Changed America, common.topic.article, m.065nkxq
JFK and LBJ, book.written_work.subjects, John F. Kennedy
The killing of a president : the complete photographic record of the JFK Assassination, the conspiracy and the cover-up, book.written_work.subjects, John F. Kennedy
JFK in Ireland, book.written_work.subjects, John F. Kennedy
John F. Kennedy, people.sibling_relationship.sibling, m.03hs9fc
John F. Kennedy, people.person.sibling_s, m.02_wjwf
John F. Kennedy, people.person.education, m.0125jfhh
John F. Kennedy Jr., people.person.sibling_s, m.07ydn0q
Martin Luther King, Jr., people.person.parents, Martin Luther King, Sr.
The killing of a president : the complete photographic record of the JFK Assassination, the conspiracy and the cover-up, book.written_work.subjects, History of the United States
John F. Kennedy, book.author.works_written, Four speeches
John F. Kennedy, base.kwebbase.kwtopic.has_sentences, On November 22, 1963, Kennedy was assassinated as he and his wife drove through Dallas, Texas.
JFK: BREAKING THE NEWS, film.film.country, United States of America
Joseph P. Kennedy, Jr., people.person.parents, Rose Kennedy
Forty ways to look at JFK, common.topic.notable_types, Book
The Papers of Martin Luther King, Jr., Volume VI: Advocate of the Social Gospel, September 1948 – March 1963, common.topic.notable_types, Book
John-F.-Kennedy-Platz, common.topic.notable_for, g.1256fvdhn
Assassination of John F. Kennedy, film.film_subject.films, JFK
Assassination of Martin Luther King, Jr., time.event.locations, Memphis
John F. Kennedy, common.topic.article, m.0230ccb
Humanitarian, people.profession.people_with_this_profession, Martin Luther King, Jr.
Kennedy family, people.family.members, Joseph P. Kennedy, Jr.
JFK Remembered: 50 Years Later, film.film.language, English Language
John F. Kennedy, book.book_subject.works, The JFK assassination
Martin Luther King Jr NYWTS, common.image.appears_in_topic_gallery, Martin Luther King Middle School
JFK, film.film.language, English Language
Assassination of John F. Kennedy, time.event.locations, Dallas
Assassination of John F. Kennedy, symbols.namesake.named_after, John F. Kennedy
John F. Kennedy, common.topic.webpage, m.0b48tfl
john fitzgerald kennedy allegedly assassinated by lee harvey oswald, base.kwebbase.kwconnection.relation, allegedly assassinated by
Martin Luther King, Jr., people.person.profession, Writer
Martin Luther King III, people.person.parents, Martin Luther King, Jr.
Assassination of John F. Kennedy, film.film_subject.films, Zapruder film
The uncommon wisdom of JFK, common.topic.notable_types, Book
John F. Kennedy, music.artist.track, John F. Kennedy Speech
John F. Kennedy, people.person.education, m.0127vzjh
John F. Kennedy, people.person.religion, Catholicism
Martin Luther King III, people.person.gender, Male
April 4, 1968: Martin Luther King, Jr.'s Death and How it Changed America, book.book.genre, Non-fiction
m.03lfqsd, people.sibling_relationship.sibling, John F. Kennedy
The wisdom of JFK, book.written_work.author, John F. Kennedy
The wisdom of JFK, common.topic.notable_types, Book
Countdown of 10 Amazing Moments from the Year 2011: No. 9 Belafonte's New Song, base.reviews.review.mentions, Robert F. Kennedy
Martin Luther King, Jr., common.topic.subject_of, Text and Meaning Series
m.0ypz1mv, event.speech_or_presentation.speaker_s, John F. Kennedy
John F. Kennedy, people.person.sibling_s, m.03lfpfx
Martin Luther King, Jr., base.activism.activist.area_of_activism, Anti-racism
Assassination of John F. Kennedy, base.culturalevent.event.entity_involved, John F. Kennedy
JFK: BREAKING THE NEWS, film.film.personal_appearances, m.0_t8tdg
Assassination of Martin Luther King, Jr., base.culturalevent.event.entity_involved, Martin Luther King, Jr.
Politician, people.person.profession, Robert F. Kennedy
Joseph P. Kennedy, Sr., people.person.children, Robert F. Kennedy
John F. Kennedy, people.person.education, m.04t5mdc
Joseph P. Kennedy, Jr., people.person.place_of_birth, Brookline
[JFK], music.recording.contributions, g.11c3k32nkf
Martin Luther King, Sr., people.person.ethnicity, African American
Martin Luther King, Jr., base.activism.activist.area_of_activism, Humanitarian
Martin Luther King, Jr., freebase.valuenotation.is_reviewed, Children

Answer: Robert F. Kennedy