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 countries in Sahel does the Niger River flow into and export to the US? 
Knowledge Triplets: Presidential system, government.form_of_government.countries, Nigeria
Niger River, common.topic.notable_for, g.1256x4th6
Niger, base.aareas.schema.administrative_area.administrative_parent, Earth
Skagit River, geography.river.basin_countries, United States of America
m.04bfg3x, location.imports_and_exports.exported_to, United States of America
m.0493748, location.imports_and_exports.imported_from, United States of America
m.0cqfbfm, location.imports_and_exports.exported_to, United States of America
Sahel, location.location.partially_containedby, Ethiopia
Niger River, location.location.partially_contained_by, m.0wg9h4x
Saint Lawrence River, geography.river.basin_countries, United States of America
m.049373t, location.imports_and_exports.exported_to, United States of America
Niger River, geography.river.basin_countries, Niger
United States of America, location.location.partially_contains, Red River of the North
United States of America, location.statistical_region.major_imports, m.04g4sb5
m.0493788, location.imports_and_exports.currency, United States Dollar
Niger, location.location.partially_contains, Sahel
m.0wg8_92, location.partial_containment_relationship.partially_contains, Sahel
m.049377t, location.imports_and_exports.currency, United States Dollar
Saurashtra language, language.human_language.countries_spoken_in, United States of America
m.049376h, location.imports_and_exports.currency, United States Dollar
Niger River, geography.river.basin_countries, Benin
m.049376n, location.imports_and_exports.exported_to, United States of America
m.0wg8_dk, location.partial_containment_relationship.partially_contains, Sahel
United States of America, location.location.partially_contains, Pembina River
m.049377n, location.imports_and_exports.currency, United States Dollar
Country, common.topic.notable_types, Nigeria
m.049377b, location.imports_and_exports.exported_to, United States of America
m.049375p, location.imports_and_exports.imported_from, United States of America
m.0wg8zq2, location.partial_containment_relationship.partially_contains, Niger River
United States of America, location.statistical_region.places_imported_from, m.04fxlft
United States of America, location.statistical_region.places_exported_to, m.04bccr9
m.04c6sht, location.imports_and_exports.exported_to, United States of America
Alsek River, geography.river.basin_countries, United States of America
Tijuana River, geography.river.basin_countries, United States of America
Niger River, geography.river.cities, Onitsha
m.049373z, location.imports_and_exports.imported_from, United States of America
Niger, base.locations.countries.continent, Africa
Sahel, location.location.partially_contained_by, m.0wg8_7d
Map of the Niger River basin and part of the Guinea highlands towards the southwest, common.image.appears_in_topic_gallery, Niger Basin Authority
United States of America, location.statistical_region.foreign_direct_investment_net_inflows, g.1hhc534c2
Sahel, location.location.partially_contained_by, m.0wg8zpq
United States of America, location.statistical_region.places_imported_from, m.0dm4wc4
United States of America, location.location.partially_contains, Yukon River
Niger, location.location.time_zones, West Africa Time Zone
m.0wg8_g7, location.partial_containment_relationship.partially_contains, Sahel
m.0493774, location.imports_and_exports.exported_to, United States of America
Niger River, location.location.partially_containedby, Nigeria
United States of America, location.statistical_region.places_imported_from, m.049373t
Sahel, common.topic.notable_types, Region
United States of America, location.statistical_region.places_imported_from, m.049378y
United States of America, location.location.partially_contains, Richelieu River
United States of America, location.statistical_region.places_imported_from, m.049377h
Aroostook River, geography.river.basin_countries, United States of America
Operation Barkhane, time.event.locations, Sahel
m.07nffdb, base.ontologies.ontology_instance_mapping.freebase_topic, Niger River
United States of America, base.locations.countries.planet, Earth
m.0hz7hby, location.adjoining_relationship.adjoins, Sahel
United States of America, location.statistical_region.major_exports, m.04g4s8q
Sahel, location.location.partially_containedby, Mauritania
Sahel, location.location.partially_contained_by, m.0wg8_dk
United States of America, location.country.administrative_divisions, 19012
United States of America, location.statistical_region.places_imported_from, m.049374r
Sahel, location.location.partially_containedby, Sudan
Federal republic, location.country.form_of_government, Nigeria
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1hhc4006c
m.049375p, location.imports_and_exports.currency, United States Dollar
United States of America, location.statistical_region.places_exported_to, m.0493756
Nigeria, location.location.partially_contains, Sahel
Niamey, location.location.containedby, Niger
Sudan, location.location.partially_contains, Sahel
m.0wg8zpq, location.partial_containment_relationship.partially_contained_by, Niger
United States of America, base.locations.countries.planet, Earth
United States of America, language.human_language.main_country, English Language
Niger, location.location.events, Insurgency in the Maghreb
United States of America, location.statistical_region.major_imports, m.04g4sbn
Niger River, geography.river.basin_countries, Mali
Nigeria, location.location.partially_contains, Niger River
United States of America, location.statistical_region.places_imported_from, m.0493788
Niger River, location.location.partially_contained_by, m.0wg8zq2
United States of America, location.country.internet_tld, gov
m.049377h, location.imports_and_exports.exported_to, United States of America
Niger river at Koulikoro, common.image.appears_in_topic_gallery, Niger River
United States of America, location.statistical_region.places_imported_from, m.049377b
Sahel, common.topic.image, Map sahel
Niger River, location.location.partially_containedby, Nigeria
m.0wg8zpq, location.partial_containment_relationship.partially_contains, Sahel
m.0cl9ldp, location.imports_and_exports.exported_to, United States of America
Sahel, location.location.partially_containedby, Niger
Niger River, geography.river.cities, Timbuktu
m.049376_, location.imports_and_exports.exported_to, United States of America
m.0wg8_cg, location.partial_containment_relationship.partially_contains, Sahel
Stikine River, geography.river.basin_countries, United States of America
United States of America, location.country.languages_spoken, Saurashtra language
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1hhc48hy6
Map of the Niger River basin and part of the Guinea highlands towards the southwest, common.image.size, m.0291hmd
m.049375c, location.imports_and_exports.imported_from, United States of America
Niamey, base.biblioness.bibs_location.country, Niger
United States of America, location.statistical_region.places_imported_from, m.049376v
United States of America, location.country.internet_tld, edu
m.049378y, location.imports_and_exports.exported_to, United States of America
Ethiopia, location.location.partially_contains, Sahel
m.049375j, location.imports_and_exports.currency, United States Dollar
m.04938pv, location.imports_and_exports.imported_from, United States of America
United States of America, location.location.partially_contains, Kettle River
m.0wg8_9w, location.partial_containment_relationship.partially_contains, Sahel
United States of America, location.statistical_region.places_exported_to, m.0493792
United States of America, location.statistical_region.places_exported_to, m.04fl3np
United States of America, location.country.internet_tld, us
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1hhc3j2pk
m.04bccr9, location.imports_and_exports.imported_from, United States of America
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1hhc42f58
m.049377n, location.imports_and_exports.imported_from, United States of America
Fortymile River, geography.river.basin_countries, United States of America
United States of America, location.location.partially_contains, Meduxnekeag River
m.049376v, location.imports_and_exports.imported_from, Nigeria
Niger, location.country.capital, Niamey
Sahel, common.topic.image, Sahel Map-Africa rough
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1hhc4wt74
m.049374f, location.imports_and_exports.currency, United States Dollar
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1hhc4tk14
m.04bc95w, location.imports_and_exports.exported_to, United States of America
Niger River, base.schemastaging.context_name.pronunciation, g.125_r2vgq
Sahel, location.location.partially_contained_by, m.0wg8_2c
United States of America, location.statistical_region.places_exported_to, m.049375v
m.0493756, location.imports_and_exports.imported_from, United States of America
Sovereign state, base.aareas.schema.administrative_area.administrative_area_type, Nigeria
United States of America, common.topic.notable_for, g.1255r20f5
United States of America, location.statistical_region.places_exported_to, m.049379x
m.0493792, location.imports_and_exports.currency, United States Dollar
Niger river at Koulikoro, common.image.size, m.0kjks2
Map of the Niger River basin and part of the Guinea highlands towards the southwest, common.image.appears_in_topic_gallery, Azawagh
m.049376n, location.imports_and_exports.currency, United States Dollar
Niger, location.country.administrative_divisions, Niamey
Sahara, location.location.partially_containedby, Niger
Saint John River, geography.river.basin_countries, United States of America
Sahel, location.location.partially_contained_by, m.0wg8_92
m.04fxlft, location.imports_and_exports.exported_to, United States of America
m.0493774, location.imports_and_exports.currency, United States Dollar
m.0wg8_4b, location.partial_containment_relationship.partially_contains, Sahel
m.049377z, location.imports_and_exports.exported_to, United States of America
m.0wg9h4x, location.partial_containment_relationship.partially_contains, Niger River
Guinea, location.location.partially_contains, Niger River
Sahel, location.location.partially_contained_by, m.0wg8_4b
m.049373t, location.imports_and_exports.currency, United States Dollar
World Trade Organization, organization.organization.founders, Nigeria
United States of America, location.statistical_region.places_exported_to, m.049374x
m.0493797, location.imports_and_exports.currency, United States Dollar
Niger River, geography.river.cities, Lokoja
Sahel, location.location.partially_contained_by, m.0wg8_cg
m.0493756, location.imports_and_exports.currency, United States Dollar
Water Music, book.written_work.subjects, Niger River
United States of America, location.statistical_region.places_exported_to, m.0493748
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1hhc53pms
United States of America, location.location.partially_contains, Alsek River
Sahel, location.location.partially_containedby, Chad
Sahel, location.location.partially_containedby, Eritrea
United States of America, location.statistical_region.places_imported_from, m.04bfg3x
Map of the Niger River basin and part of the Guinea highlands towards the southwest, common.image.appears_in_topic_gallery, Guinea Highlands
Niger River, geography.river.cities, Bamako
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1hhc4xffs
Richard and John Lander Niger Expeditition 1830, time.event.locations, Niger River
Sahel, book.book_subject.works, Angry Wind: Through Muslim Black Africa by Truck, Bus, Boat, and Camel
United States of America, location.location.partially_contains, Similkameen River
Niger River, geography.river.origin, Guinea Highlands
Niger river at Koulikoro, common.image.appears_in_topic_gallery, Koulikoro Cercle
Niger, location.location.partially_contains, Niger River
m.049376v, location.imports_and_exports.imported_from, Nigeria
United States of America, location.location.partially_contains, Missisquoi River
Sahel, location.location.adjoin_s, m.0hz7hby
m.0wg8_d7, location.partial_containment_relationship.partially_contains, Niger River
m.0493783, location.imports_and_exports.exported_to, United States of America
Sahel Map-Africa rough, common.image.size, m.05tx4z5
United States of America, location.location.partially_contains, Okanogan River
UNESCO, organization.organization.founders, United States of America
m.049375c, location.imports_and_exports.currency, United States Dollar
Map of the Niger River basin and part of the Guinea highlands towards the southwest, common.image.appears_in_topic_gallery, African Association
m.049379x, location.imports_and_exports.imported_from, United States of America
Niger River, base.ontologies.ontology_instance.equivalent_instances, m.07nffdb
New River, location.location.partially_containedby, United States of America
m.049377z, location.imports_and_exports.currency, United States Dollar
m.049376v, location.imports_and_exports.exported_to, United States of America
United States of America, location.statistical_region.places_exported_to, m.049376h
United States of America, location.country.administrative_divisions, Borinquen
Mali, location.location.partially_contains, Sahel
m.049374r, location.imports_and_exports.exported_to, United States of America
m.049374l, location.imports_and_exports.imported_from, United States of America
United States of America, location.statistical_region.places_imported_from, m.0493774
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1hhc47k9y
Yukon River, geography.river.basin_countries, United States of America
Richard and John Lander Niger Expeditition 1830, common.topic.notable_for, g.125h43zwm
Meduxnekeag River, geography.river.basin_countries, United States of America
United States of America, location.statistical_region.places_exported_to, m.049377n
m.049374x, location.imports_and_exports.imported_from, United States of America
United States of America, government.form_of_government.countries, Federal republic
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1hhc4wpjk
United States of America, location.location.partially_contains, Porcupine River
New River, geography.river.basin_countries, United States of America
m.049373z, location.imports_and_exports.currency, United States Dollar
Burkina Faso, location.location.partially_contains, Sahel
Niger River, location.location.partially_contained_by, m.0wg9jq9
United States of America, location.location.partially_contains, Frenchman River
United States of America, location.location.partially_contains, Milk River
m.04fl3np, location.imports_and_exports.imported_from, United States of America
Algeria, location.location.partially_contains, Sahel
m.04fhpj6, location.imports_and_exports.exported_to, Algeria
m.0493751, location.imports_and_exports.currency, United States Dollar
United States of America, location.statistical_region.places_exported_to, m.04938pv
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1hhc4my4j
Niger River, book.book_subject.works, Water Music
m.0wg8zq2, location.partial_containment_relationship.partially_contained_by, Niger
m.049375v, location.imports_and_exports.imported_from, United States of America
United States of America, location.statistical_region.places_exported_to, m.049377t
m.0493788, location.imports_and_exports.exported_to, United States of America
Red River of the North, geography.river.basin_countries, United States of America
Koulikoro Cercle, common.topic.image, Niger river at Koulikoro
Sahel Map-Africa rough, common.image.appears_in_topic_gallery, Sahel
Sahel, location.location.partially_containedby, Algeria
Niger River, location.location.partially_containedby, Mali
United States of America, location.statistical_region.places_imported_from, m.04939hm
Niger River, geography.river.cities, Tembakounda
m.04939hm, location.imports_and_exports.exported_to, United States of America
United States of America, location.statistical_region.places_imported_from, m.0493783
Niger, base.aareas.schema.administrative_area.administrative_area_type, Sovereign state
m.0wg8zmb, location.partial_containment_relationship.partially_contains, Sahel
Sahel, common.topic.article, m.0l5_w
Colorado River, geography.river.basin_countries, United States of America
United States of America, location.statistical_region.places_imported_from, m.04fl3qp
United States of America, location.statistical_region.places_exported_to, m.049374l
m.049374x, location.imports_and_exports.exported_to, Mexico
m.0493783, location.imports_and_exports.currency, United States Dollar
United States of America, location.statistical_region.places_imported_from, m.049376_
United States of America, location.location.partially_contains, Fortymile River
United States of America, olympics.olympic_participating_country.olympics_participated_in, 1952 Summer Olympics
United States of America, base.locations.countries.continent, North America
United States of America, location.statistical_region.major_exports, m.04g4s8k
Earth, base.aareas.schema.administrative_area.administrative_parent, Nigeria
Niger, olympics.olympic_participating_country.olympics_participated_in, 2008 Summer Olympics
United States of America, location.country.languages_spoken, Lojban
Sahel, location.location.partially_containedby, Nigeria
Map sahel, common.image.appears_in_topic_gallery, Sahel
m.0493797, location.imports_and_exports.imported_from, United States of America
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1hhc3j5s8
m.0wg8_7d, location.partial_containment_relationship.partially_contains, Sahel
United States of America, location.statistical_region.places_exported_to, m.0493797
Senegal, location.location.partially_contains, Sahel
United States of America, government.form_of_government.countries, Presidential system
United States of America, location.statistical_region.major_imports, m.04g4sbz
Richard and John Lander Niger Expeditition 1830, common.topic.notable_types, Event
Niger, location.location.partiallycontains, m.0wg8zq2
United States of America, location.location.partially_contains, Skagit River
Niger River, geography.river.mouth, Gulf of Guinea
m.049376v, location.imports_and_exports.currency, United States Dollar
Sahel, location.location.partially_containedby, Burkina Faso
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1hhc38vb7
United States of America, location.statistical_region.foreign_direct_investment_net_inflows, g.12tb6gb1z
Sahel Map-Africa rough, common.image.appears_in_topic_gallery, Sahelian kingdoms
United States of America, location.location.partially_contains, New River
Sahel Map-Africa rough, common.image.appears_in_topic_gallery, 2010 Sahel famine
m.04fhph1, location.imports_and_exports.exported_to, United States of America
Niger River, location.location.partially_containedby, Benin
Niger River, geography.river.basin_countries, Nigeria
Niger, common.topic.notable_types, Country
United States of America, location.statistical_region.major_exports, m.04g4s8w
United States of America, location.statistical_region.places_exported_to, m.04fxlgq
United States of America, base.aareas.schema.administrative_area.administrative_area_type, Sovereign state
United States of America, location.statistical_region.places_imported_from, m.04bc95w
m.04xd0mv, location.imports_and_exports.imported_from, United States of America
United States of America, location.location.partially_contains, Tijuana River
Niger River, geography.river.basin_countries, Guinea
Niger River, location.location.containedby, Africa
United States of America, location.location.partially_contains, Souris River
United States of America, location.statistical_region.places_exported_to, m.049375j
United States of America, location.statistical_region.places_imported_from, m.0cl9ldp
Chad, location.location.partially_contains, Sahel
Niger River, common.topic.article, m.05ct6
Angry Wind: Through Muslim Black Africa by Truck, Bus, Boat, and Camel, book.written_work.subjects, Sahel
United States of America, location.country.internet_tld, mil
m.0493792, location.imports_and_exports.imported_from, United States of America
m.0493743, location.imports_and_exports.exported_to, United States of America
Guinea Highlands, common.topic.image, Map of the Niger River basin and part of the Guinea highlands towards the southwest
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1hhc3szn9
Niger River, location.location.events, Richard and John Lander Niger Expeditition 1830
m.049375j, location.imports_and_exports.imported_from, United States of America
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1hhc4b1w3
Mauritania, location.location.partially_contains, Sahel
Niger River, common.topic.notable_types, River
m.0wg8_2c, location.partial_containment_relationship.partially_contains, Sahel
Niger River, common.topic.image, Niger river at Koulikoro
m.04fhpj6, location.imports_and_exports.imported_from, United States of America
United States of America, location.statistical_region.major_imports, m.04g4sbt
United States of America, location.statistical_region.places_imported_from, m.04c6sht
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1s05zsygf
United States of America, common.topic.article, m.09c7wb
m.049376_, location.imports_and_exports.currency, United States Dollar
Sahel, location.location.containedby, Africa
United States of America, location.statistical_region.foreign_direct_investment_net_inflows, g.1hhc4mhp2
m.0493748, location.imports_and_exports.currency, United States Dollar
English Language, location.country.languages_spoken, Nigeria
United States of America, location.location.partially_contains, Stikine River
United States of America, location.statistical_region.places_imported_from, m.049377z
United States of America, location.statistical_region.places_imported_from, m.049376v
United States of America, location.location.partially_contains, White River
Niger, location.location.containedby, Africa
Sahel, location.location.partially_containedby, Nigeria
m.0wg8_56, location.partial_containment_relationship.partially_contains, Niger River
United States of America, organization.organization_founder.organizations_founded, World Trade Organization
m.0wg8znm, location.partial_containment_relationship.partially_contains, Sahel
Niger, freebase.valuenotation.is_reviewed, Time zone(s)
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.12cp_jm9v
Niger River, location.location.partially_contained_by, m.0wg8_56
Niger, location.location.partiallycontains, m.0wg8zpq
United States of America, location.statistical_region.places_exported_to, m.049373z
United States of America, location.statistical_region.places_exported_to, m.049375c
United States of America, location.statistical_region.places_imported_from, m.04fhph1
Sahel, location.location.partially_contained_by, m.0wg8_g7
United States of America, location.statistical_region.places_imported_from, m.049374f
m.0wg9jq9, location.partial_containment_relationship.partially_contains, Niger River
United States of America, common.topic.notable_types, Country
Africa, base.locations.continents.countries_within, Niger
m.049374r, location.imports_and_exports.currency, United States Dollar
United States of America, location.location.partially_contains, Aroostook River
Saint Francis River, geography.river.basin_countries, United States of America
Sahel, location.location.partially_contained_by, m.0wg8znm
United States of America, location.statistical_region.places_exported_to, m.04fhpj6
m.0493751, location.imports_and_exports.exported_to, United States of America
Niger, location.location.partially_contains, Sahara
Nigeria, location.statistical_region.places_exported_to, m.049376v
m.049377b, location.imports_and_exports.currency, United States Dollar
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1hhc4krtn
m.0dm4wc4, location.imports_and_exports.exported_to, United States of America
Sahel, location.location.partially_containedby, Mali
m.049375v, location.imports_and_exports.currency, United States Dollar
United States of America, location.statistical_region.places_exported_to, m.049375p
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1hhc54r1t
Mali, location.location.partially_contains, Niger River
m.04fl3qp, location.imports_and_exports.exported_to, United States of America
United States of America, location.location.partially_contains, Pend Oreille River
United States of America, location.statistical_region.places_imported_from, m.048_4q3
Niger River, location.location.partially_contained_by, m.0wg8_d7
Niger River, location.location.partially_containedby, Niger
Nigeria, base.locations.countries.continent, Africa
Sahel, location.location.events, Operation Barkhane
Niger, base.aareas.schema.administrative_area.administrative_children, Niamey
United States of America, location.statistical_region.major_imports, m.04g4sbb
m.049374f, location.imports_and_exports.exported_to, United States of America
Sahel, location.location.partially_contained_by, m.0wg8_9w
Sahel, common.topic.notable_for, g.1256sj16c
Niger River, common.topic.image, Map of the Niger River basin and part of the Guinea highlands towards the southwest
m.049378y, location.imports_and_exports.currency, United States Dollar
m.049376h, location.imports_and_exports.imported_from, United States of America
Map of the Niger River basin and part of the Guinea highlands towards the southwest, common.image.appears_in_topic_gallery, Niger River
United States of America, location.statistical_region.places_exported_to, m.04xd0mv
Niamey, location.administrative_division.country, Niger
Niger River, geography.river.cities, Niamey
m.049374x, location.imports_and_exports.currency, United States Dollar
m.04xd0mv, location.imports_and_exports.currency, United States Dollar
m.049374l, location.imports_and_exports.currency, United States Dollar
Saint Croix River, geography.river.basin_countries, United States of America
Sahel, location.location.partially_contained_by, m.0wg8zmb
m.0493743, location.imports_and_exports.currency, United States Dollar
1952 Summer Olympics, olympics.olympic_games.participating_countries, Nigeria
Sahel, location.location.geolocation, m.052p1_0
Map sahel, common.image.size, m.01x3vs0
Santa Cruz River, geography.river.basin_countries, United States of America
Benin, location.location.partially_contains, Niger River
Niger River, location.location.partially_containedby, Guinea
m.049377t, location.imports_and_exports.imported_from, United States of America
United States of America, location.statistical_region.major_exports, m.04g4s90
Eritrea, location.location.partially_contains, Sahel
Rio Grande, geography.river.basin_countries, United States of America
m.04fxlgq, location.imports_and_exports.imported_from, United States of America
United States of America, location.statistical_region.high_tech_as_percent_of_manufactured_exports, g.1hhc4p55t
m.048_4q3, location.imports_and_exports.exported_to, United States of America
United States of America, location.country.national_anthem, m.03k0799
Sahel, location.location.partially_containedby, Senegal

Answer: Nigeria