user: You are a structured reasoning expert tasked with solving problems step by step. 
You first think about the reasoning process in the mind and then provide the answer. The reasoning process and answer should be enclosed within <think> </think> and <answer> </answer> tags, respectively, i.e., <think> reasoning process here </think> <answer> answer here </answer>. 
Given a question and the associated knowledge graph triplets (entity, relation, entity), you are asked to answer the question with these triplets and your own knowledge. 
You can break down the original question into several sub-questions and explore the given knowledge graph to solve them step-by-step. If there are multiple possible answers, choose one as the final answer. 
After thinking, when you finally reach a conclusion, clearly state the answer within <answer> </answer> tags, i.e., <answer> answer here </answer>. 
Question: what was alexander graham bell known for? 
Knowledge Triplets: Alexander Graham Bell, book.author.works_written, Memoir upon the formation of a deaf variety of the human race
m.0x2g8hr, award.award_honor.award_winner, Alexander Graham Bell
Elsie Bell, people.person.children, Mabel H. Grosvenor
Bell System, organization.organization.child, m.04kjx92
Bell Labs, business.employer.employees, m.04_6dbj
Alexander Melville Bell, base.kwebbase.kwtopic.has_sentences, In 1881 Bell moved to Washington DC to be near his son, who had settled there.
Alexander Graham Bell, organization.organization_founder.organizations_founded, AT&T Corporation
Robert Bell, freebase.valuenotation.has_value, Place of birth
Bell Labs, business.employer.employees, m.0wz20tc
m.0gwgl5b, award.award_honor.award_winner, Alexander Graham Bell
Alexander Graham Bell, people.person.sibling_s, m.0w17rt4
Bell Labs, business.employer.employees, m.0gydvww
Alexander Melville Bell, people.deceased_person.cause_of_death, Pneumonia
Bell Labs, business.employer.employees, m.0g69c2m
Alexander Graham Bell, common.topic.notable_types, Inventor
Alexander Graham Bell, people.person.parents, Alexander Melville Bell
Bell Labs, business.employer.employees, m.09tg1pf
Alexander Graham Bell, book.author.works_written, Teaching the deaf and dumb
The Bell telephone, common.topic.notable_for, g.12551kx_9
Bell Labs, organization.organization.founders, Alexander Graham Bell
m.010lc2hm, education.honorary_degree.recipient, Alexander Graham Bell
m.0w17rt4, people.sibling_relationship.sibling, Edward Charles Bell
Bell Labs, organization.organization.parent, m.0y4t9tm
Alexander Graham Bell, law.inventor.inventions, Telephone
Robert Bell, people.person.sibling_s, m.0w1c1f4
m.0w1c1f4, people.sibling_relationship.sibling, Robert Bell
Bell Labs, business.employer.employees, m.0g7p2x2
National Geographic Society, organization.organization.founders, Alexander Graham Bell
Bell, common.topic.article, m.049ygj
Alexander Melville Bell, people.person.nationality, United Kingdom
m.0j4l4vr, people.marriage.spouse, Alexander Graham Bell
Bell Labs, business.employer.employees, m.02_b2g2
Bell Labs, business.employer.employees, m.0n9xmql
Alexander Graham Bell, common.topic.image, Alexander Graham Bell in colors
Bell Labs, common.topic.article, m.017b6
Alexander Graham Bell, people.person.nationality, United States of America
Alexander Graham Bell, base.argumentmaps.innovator.original_ideas, Telephone
Bell Labs, common.topic.notable_types, Award Winner
Alexander Melville Bell, people.person.nationality, United States of America
Alexander Graham Bell, book.author.works_written, Upon the electrical experiments to determine the location of the bullet in the body of the late President Garfield
Melville James Bell, people.person.gender, Male
Bell System, organization.organization.founders, Gardiner Greene Hubbard
The Bell telephone, common.topic.notable_types, Book
Alexander Graham Bell, book.written_work.subjects, Telecommunications
Melville James Bell, people.person.parents, Eliza Grace Symonds
m.06mfp5b, book.written_work.author, Alexander Graham Bell
Bell Labs, business.employer.employees, m.0g8mrc3
Alexander Graham Bell, organization.organization_founder.organizations_founded, Bell System
Bell Labs, business.employer.employees, m.0g8mtgs
Bell Labs, business.employer.employees, m.0ydgrc0
Eliza Grace Symonds, people.person.children, Melville James Bell
Bell Labs, business.employer.employees, m.03k0clh
Robert Bell, freebase.valuenotation.has_value, Place of death
Alexander Melville Bell, base.kwebbase.kwtopic.has_sentences, At the age of fifteen, after his parents divorced, Bell accompanied his father to London.
Alexander Melville Bell, people.person.profession, Teacher
Alexander Graham Bell Association for the Deaf and Hard of Hearing, common.topic.notable_types, Nonprofit organization
Pernicious anemia, people.cause_of_death.people, Alexander Graham Bell
Elsie Bell, people.person.sibling_s, m.0w17p51
AEA Silver Dart, aviation.aircraft_model.designed_by, Alexander Graham Bell
m.010lc2fp, education.honorary_degree.recipient, Alexander Graham Bell
Alexander Melville Bell, base.kwebbase.kwtopic.connections_to, henry sweet work related to alexander melville bell
Bell System, common.topic.notable_for, g.1259t_mkj
Bell Labs, business.employer.employees, m.0gyh9m7
Alexander Melville Bell, base.kwebbase.kwtopic.has_sentences, On his return to London he joined his father's practice.
Alexander Graham Bell, book.author.works_written, Upon the production of sound by radiant energy
m.02wnswc, education.education.student, Alexander Graham Bell
Edward Charles Bell, people.person.parents, Alexander Melville Bell
m.010lc2nt, education.honorary_degree.recipient, Alexander Graham Bell
Alexander Graham Bell, people.person.sibling_s, m.0k257qs
Alexander Melville Bell, base.kwebbase.kwtopic.has_sentences, In 1897 he became an American citizen.
Bell House, architecture.structure.architectural_style, Stick style
Edward Charles Bell, freebase.valuenotation.has_value, Place of death
Marian Hubbard Bell, people.person.parents, Mabel Gardiner Hubbard
Bell Labs, business.employer.employees, m.02_9n5v
Melville Bell Grosvenor, people.person.parents, Elsie Bell
m.06zx73n, protected_sites.natural_or_cultural_site_listing.listed_site, Bell House
Bell Labs, business.employer.employees, m.02_1_pq
Bell Labs, computer.software_developer.software, Inferno
Telephone, book.book_subject.works, Alexander Graham Bell
Alexander Graham Bell, book.author.works_written, The duration of life and conditions associated with longevity
Alexander Graham Bell Association for the Deaf and Hard of Hearing, organization.organization.sectors, Hearing loss
Sex-determination in sheep, book.written_work.author, Alexander Graham Bell
Alexander Graham Bell, freebase.valuenotation.is_reviewed, Date of death
Bell Labs, organization.organization.headquarters, m.0wz3lnl
Bell Labs, business.employer.employees, m.0tl9085
Bell, common.topic.notable_for, g.125brlz98
Alexander Graham Bell, book.author.works_written, Graphical studies of marriages of the deaf
Bell Telephone Memorial, common.topic.notable_for, g.1255csz55
Alexander Graham Bell, people.person.profession, Physicist
Alexander Melville Bell, book.author.works_written, Popular shorthand or steno-phonography
m.04hr0y4, people.place_lived.person, Alexander Melville Bell
Alexander Graham Bell, book.written_work.subjects, Telephone
Bell Labs, business.employer.employees, m.02_b2b6
Robert Bell, freebase.valuenotation.has_no_value, Profession
Bell Labs, business.employer.employees, m.0h2mqjd
Alexander Graham Bell in colors, common.image.appears_in_topic_gallery, Alexander Graham Bell
Robert Bell, people.person.parents, Mabel Gardiner Hubbard
Melville James Bell, people.person.sibling_s, m.0k257qs
Marian Hubbard Bell, people.person.sibling_s, m.0w1c1f4
Unix, computer.software.developer, Bell Labs
Alexander Graham Bell School, organization.organization.headquarters, m.0664c92
Alexander Graham Bell in colors, common.image.size, m.0bcbcft
Bell House, base.usnris.nris_listing.significance_level, State
Bell House, protected_sites.listed_site.designation_as_natural_or_cultural_site, m.06zx73n
Bell Labs, business.employer.employees, m.0j5tcgw
Alexander Melville Bell, people.person.children, Edward Charles Bell
Alexander Graham Bell School, education.school.school_district, Chicago Public Schools
Marian Hubbard Bell, common.topic.notable_types, Deceased Person
m.010lc2s1, education.honorary_degree.recipient, Alexander Graham Bell
AT&T, organization.organization.founders, Alexander Graham Bell
Alexander Graham Bell, people.deceased_person.cause_of_death, Diabetes mellitus
Upon the production of sound by radiant energy, book.written_work.author, Alexander Graham Bell
AT&T Corporation, organization.organization.founders, Alexander Graham Bell
Alexander Graham Bell, common.image.size, m.028zln5
Melville James Bell, freebase.valuenotation.has_value, Place of birth
Bell Labs, business.employer.employees, m.07nx050
Bell Labs, business.employer.employees, m.0g69w5m
Bell Labs, computer.operating_system_developer.operating_systems_developed, Unix
m.0j6fxtd, people.marriage.spouse, Alexander Melville Bell
Bell Labs, computer.software_developer.software, Multics
Alexander Graham Bell, book.author.works_written, The mechanism of speech
Alexander Graham Bell, book.author.works_written, Upon the formation of a deaf variety of the human race
Alexander Graham Bell, people.person.education, m.02wn17s
Bell Labs, business.employer.employees, m.09tg1nd
Bell Labs, business.employer.employees, m.04g7b75
Alexander Graham Bell School, common.topic.notable_types, School
Bell Telephone Memorial, architecture.building.building_function, Monument
Alexander Melville Bell, people.person.education, m.0w5fcjt
Bell House, common.topic.article, m.05p28yd
Alexander Melville Bell, people.person.gender, Male
Alexander Melville Bell, people.person.profession, Researcher
Upon the formation of a deaf variety of the human race, book.written_work.author, Alexander Graham Bell
Alexander Graham Bell, education.honorary_degree_recipient.honorary_degrees, m.010lc2nt
Alexander Graham Bell, education.honorary_degree_recipient.honorary_degrees, m.010lc2fp
Alexander Melville Bell, book.author.works_written, University lectures on phonetics
Alexander Graham Bell, symbols.name_source.namesakes, Bell System
Bell Labs, computer.operating_system_developer.operating_systems_developed, Multics
Bell Labs, computer.software_developer.software, Sam
Alexander Graham Bell School, common.topic.notable_for, g.125bwxct9
Robert Bell, people.person.parents, Alexander Graham Bell
Bell Labs, business.employer.employees, m.0g8mtg3
Bell Labs, business.employer.employees, m.02_78mh
Elsie Bell, people.person.sibling_s, m.0w17pb4
Alexander Graham Bell, organization.organization_founder.organizations_founded, AT&T
Bell Labs, business.employer.employees, m.0j5gbvf
Alexander Graham Bell, symbols.name_source.namesakes, Bell House
Elsie Bell, freebase.valuenotation.has_value, Country of nationality
Bell Labs, business.employer.employees, m.04_69rc
Bell Labs, business.employer.employees, m.0yb9_1b
Elsie Bell, people.person.spouse_s, m.0bfrfv1
Bell Labs, business.employer.employees, m.04zgz1w
Telephone, law.invention.inventor, Alexander Graham Bell
m.0w17rt4, people.sibling_relationship.sibling, Alexander Graham Bell
Bell Labs, business.employer.employees, m.02_9y6f
Alexander Graham Bell School, education.school.lowest_grade_taught, Pre-kindergarten
Alexander Graham Bell Association for the Deaf and Hard of Hearing, organization.non_profit_organization.registered_with, m.0pqkcc9
Bell Labs, law.inventor.inventions, Voder
Alexander Graham Bell, award.award_winner.awards_won, m.0x2g8hr
Melville James Bell, freebase.valuenotation.has_value, Country of nationality
Edward Bell, freebase.valuenotation.has_value, Country of nationality
Edward Bell, freebase.valuenotation.has_no_value, Profession
Theodore Newton Vail, organization.organization_founder.organizations_founded, Bell System
Melville James Bell, freebase.valuenotation.has_value, Place of death
Alexander Graham Bell School, common.topic.webpage, m.045ylwz
m.085pdyp, award.ranking.item, Bell System
Alexander Graham Bell, organization.organization_founder.organizations_founded, AT&T Laboratories
Bell Labs, business.employer.employees, m.0sgm_xy
Bell Labs, symbols.namesake.named_after, Alexander Graham Bell
Alexander Melville Bell, people.person.places_lived, m.04hr0y4
Alexander Graham Bell, book.author.works_written, The telephone
Bell Labs, business.employer.employees, m.0cr2v3b
Bell Labs, business.employer.employees, m.012mhz26
Bell Labs, business.employer.employees, m.0g8kytr
m.0pqkcc9, organization.non_profit_registration.non_profit_organization, Alexander Graham Bell Association for the Deaf and Hard of Hearing
Alexander Graham Bell Association for the Deaf and Hard of Hearing, organization.organization.headquarters, m.0pqpxw7
Alexander Graham Bell, symbols.name_source.namesakes, Alexander Graham Bell School
Graphophone, law.invention.inventor, Alexander Graham Bell
Bell Labs, business.employer.employees, m.0y865zf
m.0_vmqrb, education.education.student, Alexander Graham Bell
Alexander Graham Bell, aviation.aircraft_designer.aircraft_models_designed, AEA Cygnet
Alexander Graham Bell, freebase.valuenotation.is_reviewed, Country of nationality
John Alexander Douglas McCurdy, people.person.profession, Engineer
Alexander Melville Bell, book.author.works_written, Principles of speech and dictionary of sounds
Alexander Graham Bell, freebase.valuenotation.is_reviewed, Place of death
Alexander Graham Bell, law.inventor.inventions, Twisted pair
AT&T Laboratories, organization.organization.founders, Alexander Graham Bell
Alexander Graham Bell, people.person.ethnicity, Scottish people
Bell Telephone Memorial, common.topic.article, m.0fphk65
Alexander Melville Bell, book.author.works_written, Elocutionary manual
m.0w17pb4, people.sibling_relationship.sibling, Edward Bell
Robert Bell, freebase.valuenotation.has_value, Country of nationality
DJ Alexander, organization.organization.geographic_scope, Scotland
Alexander Graham Bell, freebase.valuenotation.is_reviewed, Children
Alexander Melville Bell, common.topic.notable_for, g.1256ncd58
Alexander Graham Bell, people.person.children, Elsie Bell
m.02wn17s, education.education.student, Alexander Graham Bell
Alexander Melville Bell, book.author.works_written, Sounds and their relations
Bell Labs, business.employer.employees, m.0p0dpd0
Edward Charles Bell, people.person.sibling_s, m.0w17rt4
Bell Labs, business.employer.employees, m.0h9rt8h
Alexander Graham Bell, book.written_work.subjects, United States of America
Alexander Graham Bell, common.image.appears_in_topic_gallery, Canadian Parliamentary Motion on Alexander Graham Bell
Alexander Melville Bell, common.topic.article, m.084g6f
Melville James Bell, people.person.parents, Alexander Melville Bell
m.03pvr15, people.place_lived.person, Alexander Graham Bell
Hearing loss, organization.organization_sector.organizations_in_this_sector, Alexander Graham Bell Association for the Deaf and Hard of Hearing
Decibel, symbols.namesake.named_after, Alexander Graham Bell
Bell Labs, computer.software_developer.software, Unix
m.0k257qs, people.sibling_relationship.sibling, Alexander Graham Bell
Alexander Graham Bell School, common.topic.article, m.09mdcp
Bell Labs, projects.project_participant.projects, m.0h2mql7
Bell House, location.location.containedby, Colonial Beach
Inventor, common.topic.notable_for, g.1258bjttw
Melville James Bell, common.topic.notable_types, Deceased Person
Edward Charles Bell, people.person.parents, Eliza Grace Symonds
Discovery and invention, book.written_work.author, Alexander Graham Bell
Alexander Graham Bell, book.author.works_written, Preparedness for aerial defense
Alexander Graham Bell, organization.organization_founder.organizations_founded, Oriental Telephone Company
AT&T, common.topic.image, ATT-Bell-1969-logo.png
Marian Hubbard Bell, freebase.valuenotation.has_value, Place of death
Edward Bell, freebase.valuenotation.has_value, Place of death
Bell Labs, business.employer.employees, m.07nx075
John Alexander Douglas McCurdy, people.person.nationality, Canada
Alexander Graham Bell, people.person.education, m.0n0w5b6
Bell Labs, business.employer.employees, m.03lr1f1
National Geographic Society, organization.organization.founders, Charles J. Bell
m.0pyy_zj, award.award_honor.award_winner, Alexander Graham Bell
Elsie Bell, people.person.parents, Mabel Gardiner Hubbard
Alexander Graham Bell School, education.educational_institution.school_type, Elementary school
Aerial Experiment Association, organization.organization.founders, Alexander Graham Bell
Bell Labs, computer.software_developer.software, Datablitz
Alexander Melville Bell, book.author.works_written, Sermon reading and memoriter delivery
Edward Charles Bell, common.topic.notable_types, Deceased Person
Edward Bell, freebase.valuenotation.has_value, Place of birth
m.0h8bwvp, award.hall_of_fame_induction.inductee, Alexander Graham Bell
Edward Bell, people.person.sibling_s, m.0w1c1b0
Alexander Graham Bell, education.honorary_degree_recipient.honorary_degrees, m.010lc2qf
Bell, common.topic.notable_types, Extraterrestrial location
Edward Bell, common.topic.notable_for, g.12h2yk3f0
Alexander Graham Bell, people.person.spouse_s, m.0j4l4vr
Alexander Melville Bell, base.kwebbase.kwtopic.has_sentences, \"Visible Speech\" became a vital tool in the education of the deaf and the mute.
Alexander Graham Bell, award.award_winner.awards_won, m.0h8c8fv
Alexander Graham Bell, freebase.valuenotation.is_reviewed, Place of birth
Alexander Graham Bell, people.person.education, m.02wnswc
m.0w1c1b0, people.sibling_relationship.sibling, Robert Bell
Bell Labs, business.employer.employees, m.0h6kbrq
Alexander Graham Bell, award.award_winner.awards_won, m.0gwgl5b
m.0k257qs, people.sibling_relationship.sibling, Melville James Bell
m.0h8c8fv, award.award_honor.award_winner, Alexander Graham Bell
Alexander Graham Bell, common.topic.notable_for, g.1255gdcyv
Alexander Graham Bell, people.person.children, Robert Bell
Alexander Melville Bell, people.person.parents, Alexander Bell
Bell House, symbols.namesake.named_after, Alexander Graham Bell
Bell House, location.location.containedby, Virginia
Alexander Graham Bell, award.hall_of_fame_inductee.hall_of_fame_inductions, m.0h8bwvp
Edward Bell, people.person.gender, Male
m.07ndk4y, base.ontologies.ontology_instance_mapping.freebase_topic, Alexander Graham Bell
Alexander Graham Bell, people.person.parents, Eliza Grace Symonds
m.0bfrfv1, people.marriage.spouse, Elsie Bell
The mechanism of speech, book.written_work.author, Alexander Graham Bell
Alexander Melville Bell, people.person.spouse_s, m.0j6fxtd
Bell Telephone Memorial, common.topic.notable_types, Tourist attraction
Alexander Melville Bell, people.person.place_of_birth, Edinburgh
The Sanders reader, book.written_work.author, Alexander Graham Bell
Bell Labs, business.employer.employees, m.0z4gp93
Alexander Graham Bell, common.topic.image, Alexander Graham Bell
Telephone, law.us_patent.inventor, Alexander Graham Bell
Alexander Graham Bell School, symbols.namesake.named_after, Alexander Graham Bell
Alexander Graham Bell, freebase.valuenotation.has_value, Weight
Alexander Graham Bell, people.person.nationality, Canada
Alexander Melville Bell, common.topic.image, Alexander Melville Bell
Alexander Graham Bell, aviation.aircraft_designer.aircraft_models_designed, AEA Silver Dart
Alexander Graham Bell, people.person.profession, Scientist
Bell System, common.topic.article, m.02sx6y
Elsie Bell, common.topic.notable_types, Deceased Person
Bell Labs, business.employer.employees, m.0g8mtgj
Alexander Graham Bell, organization.organization_founder.organizations_founded, Aerial Experiment Association
Bell Labs, projects.project_participant.projects, m.0h2mqfv
Bell System, organization.organization.founders, Theodore Newton Vail
Alexander Graham Bell, book.author.works_written, The Sanders reader
m.04hdfrx, people.place_lived.person, Alexander Graham Bell
Alexander Melville Bell, people.person.children, Melville James Bell
Bell Labs, business.employer.employees, m.03yy0b7
Robert Bell, people.person.sibling_s, m.0w1c1b0
Alexander Graham Bell, people.person.gender, Male
Alexander Graham Bell, organization.organization_founder.organizations_founded, National Geographic Society
Alexander Graham Bell, symbols.name_source.namesakes, Bell Telephone Memorial
Alexander Graham Bell Association for the Deaf and Hard of Hearing, common.topic.notable_for, g.1255b31qn
m.010lc2l3, education.honorary_degree.recipient, Alexander Graham Bell
m.0w1c1b0, people.sibling_relationship.sibling, Edward Bell
Bell Labs, business.employer.employees, m.0y867s1
Robert Bell, common.topic.notable_for, g.12h2w5vzt
m.0w17pc1, people.sibling_relationship.sibling, Robert Bell
Bell Labs, business.employer.employees, m.02_2s9n
Alexander Graham Bell, people.person.ethnicity, Scottish American
Alexander Graham Bell, people.person.places_lived, m.04hdfrx
Alexander Graham Bell, book.author.works_written, The Bell telephone
m.0w5fcjt, education.education.student, Alexander Melville Bell
Bell Labs, business.employer.employees, m.0g6cr18
DJ Alexander, organization.organization.place_founded, Edinburgh
Bell Labs, business.employer.employees, m.04_j268
Bell Labs, common.topic.notable_for, g.12551775b
Bell Labs, business.employer.employees, m.04hzy1z
Alexander Graham Bell, base.ontologies.ontology_instance.equivalent_instances, m.07ndk4y
m.0w1c1f4, people.sibling_relationship.sibling, Marian Hubbard Bell
Memoir upon the formation of a deaf variety of the human race, book.written_work.author, Alexander Graham Bell
Alexander Graham Bell, people.deceased_person.place_of_death, Beinn Bhreagh, Nova Scotia
Alexander Graham Bell, people.person.profession, Entrepreneur
The Bell telephone, book.written_work.author, Alexander Graham Bell
Alexander Melville Bell, common.topic.notable_types, Author
Marian Hubbard Bell, people.person.gender, Female
Alexander Melville Bell, people.person.profession, Author
Alexander Graham Bell, people.person.children, Edward Bell
Discovery and invention, common.topic.notable_for, g.1257cwk61
Alexander Melville Bell, book.author.works_written, The science of speech
Alexander Graham Bell, people.person.education, m.0_vmqrb
Alexander Melville Bell, people.person.profession, Inventor
Bell Labs, business.business_operation.industry, Information technology
Bell Labs, business.employer.employees, m.0g9bdpj
Marian Hubbard Bell, people.person.parents, Alexander Graham Bell
Alexander Graham Bell, freebase.valuenotation.has_value, Height
Bell Labs, business.employer.employees, m.0gyfz2_
Bell Telephone Memorial, symbols.namesake.named_after, Alexander Graham Bell
Alexander Graham Bell, law.inventor.inventions, Graphophone
Alexander Graham Bell, people.person.profession, Businessperson
Alexander Graham Bell, freebase.valuenotation.is_reviewed, Gender
Bell House, common.topic.notable_for, g.125d7nt5f
Alexander Graham Bell, symbols.name_source.namesakes, Bell Labs
Elsie Bell, people.person.sibling_s, m.0w17pc1
m.010lc2qf, education.honorary_degree.recipient, Alexander Graham Bell
Alexander Melville Bell, people.deceased_person.place_of_burial, Rock Creek Cemetery
Elsie Bell, people.person.gender, Female
Bell Labs, business.employer.employees, m.02_8m2q
Bell Labs, business.employer.employees, m.09vx402
DJ Alexander, organization.organization.geographic_scope, Edinburgh
Alexander Graham Bell, education.honorary_degree_recipient.honorary_degrees, m.010lc2hm
Alexander Graham Bell, award.award_winner.awards_won, m.0pyy_zj
Melville Bell Grosvenor, people.person.gender, Male
Alexander Graham Bell, education.honorary_degree_recipient.honorary_degrees, m.010lc2s1
Bell Labs, base.ontologies.ontology_instance.equivalent_instances, m.07ndn43
The duration of life and conditions associated with longevity, book.written_work.author, Alexander Graham Bell
Elsie Bell, common.topic.notable_for, g.1258bk99y
Marian Hubbard Bell, people.person.sibling_s, m.0w17p51
Alexander Graham Bell, common.topic.article, m.0k7b
Edward Bell, common.topic.notable_types, Deceased Person
Edward Charles Bell, freebase.valuenotation.has_value, Place of birth
Bell Labs, business.employer.employees, m.0wz0cr3
Preparedness for aerial defense, book.written_work.author, Alexander Graham Bell
Bell Labs, business.employer.employees, m.0hf3z_7
Bell System, common.topic.notable_types, Business Operation
Upon the electrical experiments to determine the location of the bullet in the body of the late President Garfield, book.written_work.author, Alexander Graham Bell
Bell System, symbols.namesake.named_after, Alexander Graham Bell
Alexander Graham Bell, people.person.profession, Engineer
Alexander Graham Bell Association for the Deaf and Hard of Hearing, base.schemastaging.non_profit_extra.classification, Human Services Professional Societies & Associations
Bell Labs, organization.organization.parent, m.0wz3mqx
Twisted pair, law.invention.inventor, Alexander Graham Bell
Bell System, organization.organization.founders, Alexander Graham Bell
Eliza Grace Symonds, people.person.children, Alexander Graham Bell
Alexander Melville Bell, base.kwebbase.kwtopic.connections_to, george bernard shaw used material of alexander melville bell
Gardiner Greene Hubbard, organization.organization_founder.organizations_founded, Bell System
Bell House, architecture.structure.architectural_style, Queen Anne Style architecture (Great Britain & Australia)
Alexander Graham Bell, people.person.places_lived, m.03pvr15
Alexander Graham Bell Association for the Deaf and Hard of Hearing, common.topic.image, Volta Bureau Washington DC
Alexander Melville Bell, book.author.works_written, The sounds of R
Elsie Bell, people.person.children, Melville Bell Grosvenor
Alexander Graham Bell, book.author.works_written, Sex-determination in sheep
Marian Hubbard Bell, freebase.valuenotation.has_value, Country of nationality
Marian Hubbard Bell, common.topic.notable_for, g.12blr8gv2
Telephone, base.argumentmaps.original_idea.innovator, Alexander Graham Bell
Alexander Graham Bell Association for the Deaf and Hard of Hearing, symbols.namesake.named_after, Alexander Graham Bell
Alexander Graham Bell, book.author.works_written, m.06mfp5b
Bell, astronomy.extraterrestrial_location.on_celestial_object, Moon
Alexander Graham Bell, law.inventor.inventions, Telephone
Edward Bell, people.person.sibling_s, m.0w17pb4
Alexander Graham Bell, people.person.nationality, Scotland
Alexander Graham Bell, organization.organization_founder.organizations_founded, Bell Labs
Alexander Graham Bell, education.honorary_degree_recipient.honorary_degrees, m.010lc2l3
Alexander Graham Bell, symbols.name_source.namesakes, Bell
Teaching the deaf and dumb, book.written_work.author, Alexander Graham Bell
Mabel Gardiner Hubbard, people.person.children, Edward Bell
Bell Labs, business.employer.employees, m.0y8c53k
Alexander Graham Bell, people.person.profession, Inventor
Robert Bell, common.topic.notable_types, Deceased Person
Alexander Melville Bell, book.author.works_written, English visible speech in twelve lessons
Alexander Graham Bell, symbols.name_source.namesakes, Alexander Graham Bell Association for the Deaf and Hard of Hearing
Alexander Graham Bell Association for the Deaf and Hard of Hearing, common.topic.article, m.0bpbjt
Edward Bell, people.person.parents, Alexander Graham Bell
Alexander Graham Bell, freebase.valuenotation.is_reviewed, Date of birth
Marian Hubbard Bell, freebase.valuenotation.has_value, Place of birth
Graphical studies of marriages of the deaf, book.written_work.author, Alexander Graham Bell
Edward Charles Bell, freebase.valuenotation.has_value, Country of nationality
Aerial Experiment Association, organization.organization.founders, John Alexander Douglas McCurdy
m.0w17p51, people.sibling_relationship.sibling, Marian Hubbard Bell
Oriental Telephone Company, organization.organization.founders, Alexander Graham Bell
Alexander Graham Bell, common.image.appears_in_topic_gallery, Alexander Graham Bell
Edward Charles Bell, people.person.gender, Male
Alexander Melville Bell, base.kwebbase.kwtopic.has_sentences, [Bell would later have Henry Higgins use the system in his: “Pygmalion” (“My Fair Lady”)].
Bell Labs, computer.software_developer.software, rc
Alexander Graham Bell, common.topic.notable_types, Book
Alexander Melville Bell, book.author.works_written, Hand-book of world-English
m.0n0w5b6, education.education.student, Alexander Graham Bell
John Alexander Douglas McCurdy, people.person.gender, Male
Robert Bell, people.person.sibling_s, m.0w17pc1
Robert Bell, people.person.gender, Male
Alexander Graham Bell, freebase.valuenotation.is_reviewed, Spouse (or domestic partner)
Mabel Gardiner Hubbard, people.person.children, Marian Hubbard Bell
Alexander Graham Bell School, freebase.valuenotation.is_reviewed, Headquarters
Alexander Graham Bell, people.person.children, Marian Hubbard Bell
Alexander Melville Bell, freebase.valuenotation.has_value, Place of death
m.045ylwz, common.webpage.topic, Alexander Graham Bell School
Melville Bell Grosvenor, people.person.place_of_birth, Washington, D.C.
Alexander Melville Bell, book.author.works_written, Essays and postscripts on elocution
Elsie Bell, people.person.parents, Alexander Graham Bell
Alexander Graham Bell, people.deceased_person.cause_of_death, Pernicious anemia
Bell, symbols.namesake.named_after, Alexander Graham Bell
Bell Labs, business.employer.employees, m.0j5tchf
Alexander Graham Bell, book.author.works_written, Discovery and invention
Alexander Melville Bell, book.author.works_written, Note on syllabic consonants
Bell System, business.business_operation.net_profit, m.085pdz9
Edward Bell, people.person.parents, Mabel Gardiner Hubbard
Edinburgh, organization.organization_scope.organizations_with_this_scope, DJ Alexander
Bell House, location.location.geolocation, m.06zx73g
Alexander Graham Bell, symbols.name_source.namesakes, Decibel
AEA Cygnet, aviation.aircraft_model.designed_by, Alexander Graham Bell
Alexander Graham Bell, people.person.profession, Professor
Bell House, common.topic.notable_types, Building
Bell Labs, business.employer.employees, m.0y8666p
Eliza Grace Symonds, people.person.children, Edward Charles Bell
Bell, astronomy.extraterrestrial_location.type_of_planetographic_feature, Impact crater
The telephone, book.written_work.author, Alexander Graham Bell
DJ Alexander, common.topic.notable_types, Business Operation
Alexander Graham Bell, people.person.place_of_birth, Edinburgh
Alexander Melville Bell, people.person.children, Alexander Graham Bell
Alexander Graham Bell, law.inventor.us_patents, Telephone
Bell System, business.business_operation.revenue, m.085pdz0
Mabel Gardiner Hubbard, people.person.children, Robert Bell

Answer: Telephone