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 scientist died on the date 1875-06-14 and was known for discovering Neptune? 
Knowledge Triplets: m.09y61q7, common.webpage.topic, Sun
Poseidon, base.grecoromanmythology.greek_deity.roman_equivalent, Neptune
Johann Gottfried Galle, people.person.places_lived, m.0jvsn_f
Astronomy, education.field_of_study.academics_in_this_field, Johann Gottfried Galle
Urbain Le Verrier, people.person.education, m.02wp3g8
On the revolutions, common.topic.notable_types, Book
Neptune, visual_art.art_subject.artwork_on_the_subject, Neptune
Planet, common.topic.image, Planetart
Saturn, book.written_work.subjects, Science
Solar System, book.book_subject.works, Exploring Mars
Johann Gottfried Galle, common.topic.image, JohannGalle
Laomedeia, common.topic.notable_for, g.1259dwqpb
Saturn, book.written_work.subjects, Astronomy
John Couch Adams, common.topic.image, John Couch Adams
Great Dark Spot, common.topic.image, Neptune darkspot
John Couch Adams, people.person.employment_history, m.0jwhybs
Johann Gottfried Galle, people.person.children, g.12340lk8
Uranus, book.written_work.author, Seymour Simon
Astronomy, education.field_of_study.academics_in_this_field, John Couch Adams
Our solar system, book.written_work.author, Seymour Simon
Mercury, book.written_work.author, Seymour Simon
Sun, base.satelites.orbited_body.natural_satellite_s, Neptune
The Birth and Death of the Sun, book.written_work.subjects, Astronomy
Thalassa, common.topic.notable_for, g.125dq46z1
m.0jvsp4h, people.marriage.spouse, Johann Gottfried Galle
Planet, astronomy.celestial_object_category.objects, Neptune
Heinrich Louis d'Arrest, people.person.place_of_birth, Berlin
Laomedeia, astronomy.orbital_relationship.orbits, Neptune
Direct imaging, astronomy.astronomical_discovery_technique.astronomical_discoveries_by_this_method, Neptune
m.04m0gp2, education.education.student, Johann Gottfried Galle
Sidereus Nuncius, book.written_work.subjects, Science
m.0b47268, common.webpage.topic, Sun
Johann Gottfried Galle, common.topic.notable_types, Astronomer
Direct imaging, astronomy.astronomical_discovery_technique.astronomical_discoveries_by_this_method, Arietids
Neptune, common.image.appears_in_topic_gallery, Neptune
Sao, astronomy.orbital_relationship.orbits, Neptune
Joseph Louis Gay-Lussac, influence.influence_node.influenced, Urbain Le Verrier
Johann Gottfried Galle, people.person.parents, Marie Henriette
Stargazers and Gravediggers, book.written_work.subjects, Solar System
Sao, common.topic.notable_for, g.125fpl36v
Neptunium, chemistry.chemical_element.isotopes, Neptunium-231
Astronomer, freebase.equivalent_topic.equivalent_type, Astronomer
Neptunium, common.topic.image, Neptunium2
Planet, common.topic.notable_for, g.125dd39s3
Sun, astronomy.star.planet_s, Neptune
Astronomer, people.profession.part_of_professional_field, Astronomy
Neptune, base.ontologies.ontology_instance.equivalent_instances, m.07ng7dz
Neptune, common.topic.notable_for, g.125bnl7lm
Exploring the Earth and the Cosmos, book.written_work.subjects, Astronomy
The Mars mystery, book.written_work.subjects, Solar System
Despina, astronomy.orbital_relationship.orbits, Neptune
Mercury, book.written_work.subjects, Mercury
Mercury, book.written_work.subjects, Astronomy
Galatea, astronomy.orbital_relationship.orbits, Neptune
Neptunium, chemistry.chemical_element.isotopes, Neptunium-236
De revolutionibus orbium coelestium, book.written_work.subjects, Solar System
Johann Gottfried Galle, common.topic.image, Johann Gottfried Galle
Halimede, astronomy.orbital_relationship.orbits, Neptune
Heinrich Louis d'Arrest, astronomy.astronomer.astronomical_objects_discovered, Neptune
Joseph Louis Gay-Lussac, people.deceased_person.place_of_death, Paris
Direct imaging, astronomy.astronomical_discovery_technique.astronomical_discoveries_by_this_method, SCR 1845 b
m.09x084c, common.webpage.topic, Sun
Heinrich Louis d'Arrest, people.deceased_person.place_of_death, Copenhagen
Neptune, book.written_work.subjects, Astronomy
John Couch Adams, people.person.sibling_s, m.0jw5m15
Heinrich Louis d'Arrest, common.topic.notable_for, g.1259zl2c5
Uranus, book.written_work.subjects, Technology
Small Dark Spot, common.topic.image, Cyclones on Neptune
Solar System, book.book_subject.works, Neptune
Neptune, symbols.name_source.namesakes, Neptune's Grotto
Neptune, film.film_character.portrayed_in_films, m.0h7j2z0
Astronomer, freebase.type_hints.included_types, Topic
John Hymers, people.person.profession, Mathematician
De revolutionibus orbium coelestium, book.book.genre, Mathematics
Neptune, book.written_work.subjects, Science
Urbain Le Verrier, common.topic.notable_for, g.1258t5r6_
Johann Gottfried Galle, symbols.name_source.namesakes, 2097 Galle
Direct imaging, astronomy.astronomical_discovery_technique.astronomical_discoveries_by_this_method, CT Cha b
Heinrich Louis d'Arrest, people.deceased_person.place_of_burial, Berlin
Astronomer, type.type.domain, Astronomy
Solar System, book.book_subject.works, Uranus
Neptune, common.topic.notable_types, Book
Johann Gottfried Galle, people.person.spouse_s, m.0jvsp4h
Uranus, book.written_work.subjects, Solar System
Neptune, astronomy.orbital_relationship.orbited_by, Halimede
Heinrich Louis d'Arrest, people.person.gender, Male
Neptune, common.image.size, m.02bmbyr
m.09yx3gz, common.webpage.topic, Sun
Despina, common.topic.article, m.02rfhr
Pisces, common.topic.article, m.07b6d5
Mercury, book.written_work.subjects, Solar System
Moon Hunters, book.written_work.subjects, Astronomy
m.0h7j2z0, film.performance.character, Neptune
Saturn, book.written_work.author, Seymour Simon
Triton, astronomy.astronomical_discovery.discoverer, William Lassell
Heinrich Louis d'Arrest, symbols.name_source.namesakes, 9133 d'Arrest
Sidereus Nuncius, book.written_work.subjects, Astronomy
m.09xylc8, common.webpage.topic, Sun
The Relativity of Wrong, book.book.genre, Science
m.09w1wmz, common.webpage.topic, Sun
The Mars mystery, book.written_work.subjects, Science
m.02wp2sm, education.education.student, John Couch Adams
Solar System, common.topic.notable_for, g.12575mnkr
Neptune, visual_art.art_subject.artwork_on_the_subject, Neptune Calming the Waves
Neptune, base.schemastaging.context_name.pronunciation, g.125_pcdtb
Neptunium, common.topic.image, Np-TableImage
m.09ypz7b, common.webpage.topic, Sun
Neptune, astronomy.celestial_object.locations, Great Dark Spot
Heinrich Louis d'Arrest, common.topic.image, Heinrich Louis d'Arrest
Sun, common.topic.article, m.06m__
John Couch Adams, people.person.nationality, England
Urbain Le Verrier, people.person.places_lived, m.03psn80
Urbain Le Verrier, common.topic.image, Urbain Le Verrier
Urbain Le Verrier, common.image.size, m.02c29y3
Poseidon, common.topic.notable_types, Deity
Neptune, astronomy.orbital_relationship.orbited_by, Despina
Neptune, common.topic.article, m.0c31t
De revolutionibus orbium coelestium, book.book.genre, Science
Neptune, astronomy.astronomical_discovery.discovery_technique, Direct imaging
Nereid, common.topic.article, m.05f24
Solar System, astronomy.star_system.planets, Uranus
Pisces, base.wastrology.zodiacsign.astrologicalrulership, Neptune
Heliocentric orbit, astronomy.orbit_type.orbiting_bodies, Neptune
John Couch Adams, common.topic.notable_for, g.125b9klh8
Halimede, common.topic.notable_for, g.1255c50d6
Neptune, astronomy.astronomer.astronomical_objects_discovered, Heinrich Louis d'Arrest
Neptune, common.topic.notable_for, g.1257b0_jm
Patrick Moore on Mars., book.book.genre, Science
m.09w2r8n, common.webpage.topic, Sun
Heinrich Louis d'Arrest, people.person.employment_history, m.0jw9xj8
Direct imaging, astronomy.astronomical_discovery_technique.astronomical_discoveries_by_this_method, HR 8799 d
Neptune, astronomy.astronomical_discovery.discoverer, Heinrich Louis d'Arrest
Solar System, book.book_subject.works, Sidereus Nuncius
Saturn, book.book.genre, Science
Neptune, book.book.genre, Children's literature
William Lassell, common.topic.notable_types, Astronomer
Planet, common.topic.article, m.03ywtv2
Mercury, book.written_work.subjects, Science
Johann Gottfried Galle, people.person.ethnicity, Germans
Neptune, symbols.name_source.namesakes, Fountain of Neptune, Florence
Exploring the Earth and the Cosmos, book.book.genre, Science
Small Dark Spot, astronomy.extraterrestrial_location.on_celestial_object, Neptune
John Couch Adams, people.person.sibling_s, m.0jw5m1h
The planets, book.written_work.subjects, Astronomy
Direct imaging, astronomy.astronomical_discovery_technique.astronomical_discoveries_by_this_method, Fomalhaut b
m.0jvsn_8, people.place_lived.person, Johann Gottfried Galle
Universe, book.written_work.subjects, Science
Neptune, common.image.appears_in_topic_gallery, Discovery of Neptune
Johann Gottfried Galle, symbols.name_source.namesakes, Galle
Neptune, astronomy.orbital_relationship.orbited_by, Nereid
Larissa, astronomy.orbital_relationship.orbits, Neptune
The Birth and Death of the Sun, book.written_work.subjects, Sun
Solar System, book.book_subject.works, The Planets
John Couch Adams, people.person.education, m.03l6v4j
m.03pf1l7, people.place_lived.person, Heinrich Louis d'Arrest
John Couch Adams, people.person.employment_history, m.03q4f9m
m.0b46w0c, common.webpage.topic, Sun
Johann Gottfried Galle, people.deceased_person.place_of_death, Potsdam
The planets, book.written_work.subjects, Solar System
Johann Gottfried Galle, common.topic.article, m.01d9_x
Gerard P. Kuiper, people.person.gender, Male
Astronomer, freebase.type_profile.equivalent_topic, Astronomer
m.02wn3z3, education.education.student, Urbain Le Verrier
Topic, freebase.type_profile.published, Published
Neptune, astronomy.celestial_object.celestial_age, m.0j5jn4d
John Couch Adams, people.deceased_person.place_of_death, Cambridge
Urbain Le Verrier, common.topic.notable_types, Astronomer
Neptunium, chemistry.chemical_element.isotopes, Neptunium-243
Comets, book.written_work.subjects, Astronomy
Psamathe, common.topic.notable_for, g.1257545rt
Neptune, astronomy.orbital_relationship.orbited_by, Sao
Johann Gottfried Galle, astronomy.astronomer.astronomical_objects_discovered, Neptune
Neptune (Planet), base.skosbase.skos_concept.in_scheme, Geographic Names Concept Scheme
John Hymers, people.person.gender, Male
On the revolutions, book.written_work.subjects, Solar System
John Couch Adams, people.person.employment_history, m.0jwhyc0
Neptune, common.image.appears_in_topic_gallery, Exploration of Neptune
Urbain Le Verrier, common.topic.article, m.017xw7
Solar System, book.book_subject.works, The Relativity of Wrong
William Lassell, people.person.profession, Astronomer
m.0jw9xj8, business.employment_tenure.person, Heinrich Louis d'Arrest
Urbain Le Verrier, people.person.education, m.02wn3z3
Triton, astronomy.orbital_relationship.orbits, Neptune
Neptune, base.exoplanetology.exoplanet.parent_star, Sun
Astronomy, education.field_of_study.academics_in_this_field, William Lassell
Venus, book.written_work.subjects, Science
Neptune, symbols.name_source.namesakes, Neptune
Psamathe, astronomy.astronomical_discovery.discoverer, Scott S. Sheppard
Neptune, base.skosbase.vocabulary_equivalent_topic.equivalent_concept, Neptune (Planet)
Neptune, base.wastrology.astrologicalplanet.astrologicalrulership, Pisces
Stargazers and Gravediggers, book.written_work.subjects, Astronomy
Psamathe, common.topic.image, Zdjęcie Tetydy wykonane przez sondę Cassini
Sidereus Nuncius, common.topic.notable_types, Book
Stargazers and Gravediggers, book.written_work.subjects, Science
Mathematical prediction, astronomy.astronomical_discovery_technique.astronomical_discoveries_by_this_method, Neptune
William Lassell, education.academic.research_areas, Astronomy
Mercury, Venus, Neptune…Maude?, common.resource.annotations, m.09xf_t3
m.09xf_s1, common.webpage.resource, Mercury, Venus, Neptune…Maude?
The Relativity of Wrong, book.written_work.subjects, Astronomy
Neptune, book.written_work.subjects, Neptune
Nereid, common.topic.notable_for, g.1255jhqsq
Universe, book.book.genre, Science
Book, freebase.type_profile.kind, Definition
Sun, astronomy.star.planet_s, Uranus
The Case for Mars, book.written_work.subjects, Science
Universe, book.written_work.subjects, Solar System
The Planets, book.book.genre, Mathematics
Mars, book.written_work.subjects, Astronomy
Planet, common.topic.article, m.05qd9
m.0b48mm_, common.webpage.topic, Sun
Astronomy, education.field_of_study.academics_in_this_field, Heinrich Louis d'Arrest
Larissa, astronomy.astronomical_discovery.discoverer, David J. Tholen
Direct imaging, astronomy.astronomical_discovery_technique.astronomical_discoveries_by_this_method, GQ Lup b
Neptune, astronomy.astronomical_discovery.discoverer, Urbain Le Verrier
Neso, common.topic.article, m.0393bf
Neptune, common.topic.image, Neptune
Mathematical prediction, astronomy.astronomical_discovery_technique.astronomical_discoveries_by_this_method, Pluto
Neptune, common.topic.webpage, m.09xf_s1
The Case for Mars, book.book.genre, Mathematics
Heinrich Louis d'Arrest, education.academic.research_areas, Astronomy
Comets, book.book.genre, Science
Venus, book.written_work.subjects, Astronomy
Neptune, symbols.name_source.namesakes, Fountain of Neptune, Bologna
Saturn, book.written_work.subjects, Technology
The Case for Mars, book.written_work.subjects, Astronomy
Neptune, visual_art.art_subject.artwork_on_the_subject, Neptune and Triton
John Couch Adams, people.person.profession, Mathematician
William Lassell, astronomy.astronomer.astronomical_objects_discovered, Triton
m.09x0tnd, common.webpage.topic, Sun
m.09y48fw, common.webpage.topic, Sun
Neso, common.topic.notable_for, g.1256339w6
Urbain Le Verrier, astronomy.astronomer.astronomical_objects_discovered, Neptune
Solar System, book.book_subject.works, Mercury
Neptune (Planet), base.skosbase.skos_concept.in_scheme, Authorities Concept Scheme
Urbain Le Verrier, organization.organization_member.member_of, m.0jvrj6r
Urbain Le Verrier, people.person.profession, Astronomer
Fountain of Neptune, Bologna, symbols.namesake.named_after, Neptune
Naiad, common.topic.notable_for, g.1257q_wyn
Johann Gottfried Galle, common.topic.notable_for, g.125fl6m19
Johann Gottfried Galle, people.person.profession, Astronomer
Neptune, astronomy.astronomical_discovery.discoverer, Johann Gottfried Galle
Uranus, common.topic.notable_types, Book
Neptune, base.satelites.natural_satellite.orbited_body, Sun
Neptune, common.topic.notable_types, Deity
Our solar system, book.written_work.subjects, Technology
m.0jw9wrr, education.education.student, Heinrich Louis d'Arrest
Proteus, common.topic.notable_for, g.1259sb3wy
Neptune, astronomy.orbital_relationship.orbited_by, Psamathe
Solar System, book.book_subject.works, The Orrery
Solar System, astronomy.star_system.planets, Neptune
Neptunium, symbols.namesake.named_after, Neptune
Urbain Le Verrier, common.image.appears_in_topic_gallery, Urbain Le Verrier
Heinrich Louis d'Arrest, people.person.profession, Astronomer
Uranus, book.book.genre, Children's literature
Neptune, book.written_work.subjects, Solar System
Astronomer, freebase.type_profile.strict_included_types, Topic
Direct imaging, astronomy.astronomical_discovery_technique.astronomical_discoveries_by_this_method, AB Pic b
Proteus, astronomy.orbital_relationship.orbits, Neptune
m.09xg788, common.webpage.topic, Sun
Solar System, book.book_subject.works, The planets
Neptune, astronomy.orbital_relationship.orbited_by, Thalassa
Book, freebase.type_profile.published, Published
m.09xhgd6, common.webpage.topic, Sun
Sidereus Nuncius, book.written_work.subjects, Solar System
Neso, astronomy.orbital_relationship.orbits, Neptune
Heinrich Louis d'Arrest, award.award_winner.awards_won, m.0b_m24p
John Hymers, education.academic.advisees, John Couch Adams
m.0b48_jz, common.webpage.topic, Sun
Neptune, astronomy.orbital_relationship.orbits, Sun
m.03psn80, people.place_lived.person, Urbain Le Verrier
Neptunium, chemistry.chemical_element.isotopes, Neptunium-244
m.09w2zy5, common.webpage.topic, Sun
John Couch Adams, people.person.employment_history, m.03q4f9w
Urbain Le Verrier, education.academic.research_areas, Mathematics
Johann Gottfried Galle, people.person.gender, Male
Planet Earth, inside out, book.written_work.subjects, Science
Neptune, common.image.appears_in_topic_gallery, Transit of Mars from Neptune
The Birth and Death of the Sun, book.book.genre, Mathematics
John Couch Adams, astronomy.astronomer.astronomical_objects_discovered, Neptune
Neptune, common.topic.image, Urbain Le Verrier
Venus, book.written_work.author, Seymour Simon
Great Dark Spot, astronomy.extraterrestrial_location.on_celestial_object, Neptune
Solar System, book.book_subject.works, Venus
Neptune, astronomy.orbital_relationship.orbited_by, Naiad
Patrick Moore on Mars., book.book.genre, Mathematics
Direct imaging, astronomy.astronomical_discovery_technique.astronomical_discoveries_by_this_method, Kerberos
Neptunium, chemistry.chemical_element.atomic_mass, m.05_fcxz
William Lassell, people.person.gender, Male
The planets, book.written_work.subjects, Technology
Uranus, book.written_work.subjects, Science
Johann Gottfried Galle, people.person.nationality, Germany
Planet Earth, inside out, book.written_work.subjects, Astronomy
Heinrich Louis d'Arrest, common.topic.article, m.02bw94
John Couch Adams, people.person.parents, Tabitha Knill Grylls
De revolutionibus orbium coelestium, book.written_work.subjects, Astronomy
Solar System, book.book_subject.works, On the revolutions
Direct imaging, astronomy.astronomical_discovery_technique.astronomical_discoveries_by_this_method, HR 8799 c
Mars, book.written_work.subjects, Science
Neptune, astronomy.orbital_relationship.orbited_by, Galatea
John Couch Adams, people.person.education, m.02wp2sm
The Mars mystery, common.topic.notable_types, Book
Patrick Moore on Mars., book.written_work.subjects, Solar System
Neptune, astronomy.celestial_object.category, Planet
Neptunium, common.topic.article, m.05bhr
On the revolutions, book.written_work.subjects, Science
Venus, book.written_work.subjects, Solar System
Neptune, astronomy.orbital_relationship.orbited_by, Larissa
Mademoiselle Moon, book.written_work.subjects, Sun
Astronomy, freebase.equivalent_topic.equivalent_domain, Astronomy
Neptune, common.topic.article, m.025rvxh
Stargazing, book.book.genre, Science
Mercury, Venus, Neptune…Maude?, common.resource.annotations, m.09xf_s1
m.09y0_fn, common.webpage.topic, Sun
Moon Hunters, book.written_work.subjects, Solar System
Heinrich Louis d'Arrest, people.person.nationality, Germany
Patrick Moore on Mars., book.written_work.subjects, Astronomy
Direct imaging, astronomy.astronomical_discovery_technique.astronomical_discoveries_by_this_method, HR 8799 b
Psamathe, astronomy.orbital_relationship.orbits, Neptune
John Couch Adams, people.person.employment_history, m.03q4f9d
Sidereus Nuncius, book.book.genre, Science
Neptune, astronomy.astronomical_discovery.discovery_technique, Mathematical prediction
m.09wjfwj, common.webpage.topic, Sun
Nereid, astronomy.orbital_relationship.orbits, Neptune
m.09wjd30, common.webpage.topic, Sun
Urbain Le Verrier, people.person.employment_history, m.03q0tpf
Uranus, book.written_work.subjects, Uranus
Astronomy, people.professional_field.professions_in_this_field, Astronomer
Exploring the Earth and the Cosmos, book.written_work.subjects, Science
Patrick Moore on Mars., common.topic.notable_types, Book
Neptune, astronomy.orbital_relationship.orbit_type, Heliocentric orbit
Heinrich Louis d'Arrest, astronomy.astronomer.astronomical_objects_discovered, 76 Freia
Urbain Le Verrier, people.person.profession, Mathematician
Laomedeia, common.topic.article, m.03939n
Uranus, book.written_work.subjects, Astronomy
m.09y6xcs, common.webpage.topic, Sun
On the revolutions, book.written_work.subjects, Astronomy
Naiad, common.topic.article, m.05hxs
Neptune, astronomy.orbital_relationship.orbited_by, Proteus
Direct imaging, astronomy.astronomical_discovery_technique.astronomical_discoveries_by_this_method, 2M1207 b
John Couch Adams, people.person.profession, Astronomer
Urbain Le Verrier, organization.organization_member.member_of, m.0jvrj56
Neptune, astronomy.orbital_relationship.orbited_by, Triton
John Couch Adams, people.person.sibling_s, m.0jw5m1n
Thalassa, common.topic.article, m.02rfgv
Our solar system, book.written_work.subjects, Science
Neptune, common.topic.image, Neptune is usually depicted with a trident, as seen here in this statue by Jean de Boulogne in Bologna, Italy
The Planets, book.written_work.subjects, Astronomy
Uranus, book.book.genre, Science
Sao, common.topic.article, m.039385
Johann Gottfried Galle, people.deceased_person.place_of_burial, Berlin
Thalassa, astronomy.orbital_relationship.orbits, Neptune
Solar System, book.book_subject.works, Stargazers and Gravediggers
Planet, type.type.domain, Astronomy
Comets, book.written_work.subjects, Science
Urbain Le Verrier, common.image.appears_in_topic_gallery, Neptune
Neptune, astronomy.orbital_relationship.orbited_by, Laomedeia
Halimede, common.topic.article, m.039368
m.09xss5b, common.webpage.topic, Sun
John Couch Adams, education.academic.advisors, John Hymers
The planets, book.book.genre, Science
Neptune, common.topic.notable_for, g.1255pjq1f
Heinrich Louis d'Arrest, symbols.name_source.namesakes, 6P/d'Arrest
Neptune, common.topic.image, Poseidón, dios del mar
John Couch Adams, common.topic.notable_types, Astronomer
Mars, book.book.genre, Science
The Birth and Death of the Sun, common.topic.notable_types, Book
The Birth and Death of the Sun, book.book.genre, Science
John Couch Adams, common.topic.article, m.017xwq
Gerard P. Kuiper, people.person.profession, Astronomer
The planets, book.written_work.subjects, Science
m.0b48vmd, common.webpage.topic, Sun
Venus, book.written_work.subjects, Technology
The Birth and Death of the Sun, book.written_work.subjects, Science
Solar System, book.book_subject.works, Martian Enigmas
Neptune, astronomy.star_system_body.star_system, Solar System
Sidereus Nuncius, book.book.genre, Mathematics
Patrick Moore on Mars., book.written_work.subjects, Mars
Neptunium, common.topic.notable_for, g.1254z5mts
Johann Gottfried Galle, people.person.places_lived, m.0jvsn_8
Deity, freebase.type_profile.published, Published
Neptunium, chemistry.chemical_element.isotopes, Neptunium-226
Neptune (Planet), base.skosbase.skos_concept.equivalent_topic, Neptune
Planet, freebase.type_profile.published, Published
m.09ybmyq, common.webpage.topic, Sun
Astronomer, freebase.type_profile.published, Published
John Couch Adams, book.author.works_written, On Newton's solution of Kepler's problem
Proteus, common.topic.article, m.016wd3
Naiad, astronomy.orbital_relationship.orbits, Neptune
Neptune, book.book_subject.works, Neptune
Universe, book.written_work.subjects, Astronomy
Despina, common.topic.notable_for, g.125b667j4
Solar System, book.book_subject.works, Universe
Heinrich Louis d'Arrest, astronomy.astronomer.astronomical_objects_discovered, 6P/d'Arrest
Patrick Moore on Mars., book.written_work.subjects, Science
Heinrich Louis d'Arrest, people.person.ethnicity, Germans
Solar System, book.book_subject.works, Saturn
Neptune, book.written_work.author, Seymour Simon
Neptune (Planet), base.skosbase.skos_concept.broader, Outer planets
Neptune, common.topic.notable_types, Planet
Heinrich Louis d'Arrest, symbols.name_source.namesakes, D'Arrest
Triton, common.topic.article, m.0c2yp
Solar System, book.book_subject.works, De revolutionibus orbium coelestium
Neptune, symbols.name_source.namesakes, Neptunium
Our solar system, book.written_work.subjects, Astronomy
Nereid, astronomy.astronomical_discovery.discoverer, Gerard P. Kuiper
Johann Gottfried Galle, people.person.education, m.04m0gp2
Planet, astronomy.celestial_object_category.objects, Uranus
Psamathe, common.topic.article, m.0393bx
Johann Gottfried Galle, people.person.place_of_birth, Radis
m.03l6v4j, education.education.student, John Couch Adams
Gerard P. Kuiper, common.topic.notable_types, Astronomer
m.02wp3g8, education.education.student, Urbain Le Verrier
Saturn, book.written_work.subjects, Solar System
m.0b48sgp, common.webpage.topic, Sun
The Relativity of Wrong, book.written_work.subjects, Science
Moon Hunters, book.book.genre, Science
Neptune, symbols.name_source.namesakes, Neptunalia
Heinrich Louis d'Arrest, people.person.education, m.0jw9wrr
Triton, common.topic.notable_for, g.1255l1m9t
Heinrich Louis d'Arrest, common.topic.notable_types, Astronomer
Astronomer, people.profession.corresponding_type, Astronomer
Neptune, astronomy.astronomical_discovery.discoverer, John Couch Adams
Neptune, base.grecoromanmythology.roman_deity.greek_equivalent, Poseidon
Johann Gottfried Galle, education.academic.research_areas, Astronomy
Heinrich Louis d'Arrest, people.person.places_lived, m.03pf1l7
Neptune, astronomy.orbital_relationship.orbited_by, Neso
The Relativity of Wrong, book.written_work.subjects, Solar System
m.09xf_s1, common.webpage.topic, Neptune
Neptune, common.topic.image, Pl-gdansk-neptun2004
The Case for Mars, book.book.genre, Science
m.0jvsn_f, people.place_lived.person, Johann Gottfried Galle
The Mars mystery, book.written_work.subjects, Astronomy
The Planets, book.written_work.subjects, Solar System
Johann Gottfried Galle, people.person.parents, J. Gottfried Galle
m.09wcr2g, common.webpage.topic, Sun
m.09xf_t3, common.webpage.resource, Mercury, Venus, Neptune…Maude?
Great Dark Spot, common.topic.image, Neptune's Great Dark Spot
m.0b47285, common.webpage.topic, Sun
m.07ng7dz, base.ontologies.ontology_instance_mapping.freebase_topic, Neptune
Despina, common.topic.image, Despina
Neptune, symbols.namesake.named_after, Neptune
Neptune, book.written_work.subjects, Technology
Neptune (Planet), base.skosbase.skos_concept.narrower, Neptune (Planet)--Ring system
De revolutionibus orbium coelestium, common.topic.notable_types, Book
Neptunium, chemistry.chemical_element.isotopes, Neptunium-229
Neptune, astronomy.celestial_object.locations, Small Dark Spot
John Couch Adams, education.academic.research_areas, Astronomy
Saturn, book.written_work.subjects, Saturn
Gerard P. Kuiper, astronomy.astronomer.astronomical_objects_discovered, Nereid

Answer: Heinrich Louis d'Arrest