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 language is spoken by the ethnic group which includes the Sihasapa Indians? 
Knowledge Triplets: Hunkpapa, people.ethnicity.included_in_group, Lakota people
Oglala Lakota, people.ethnicity.included_in_group, Plains Indians
Two Kettles, common.topic.notable_types, Ethnicity
Ethnicity, type.type.properties, Languages spoken
m.0b7945l, military.military_combatant_group.combatants, Lakota people
Lakota people, people.ethnicity.people, Leonard Crow Dog
Plains Indians, people.ethnicity.includes_groups, Lakota people
Ethnicity, type.type.expected_by, Related ethnic groups
Lakota people, common.topic.notable_for, g.125dz2w38
Lakota people, military.military_combatant.military_conflicts, m.0b78vfj
m.0g5vgw8, military.military_combatant_group.combatants, Lakota people
Lakota people, military.military_combatant.military_conflicts, m.0b78ws_
Oglala Lakota, people.ethnicity.included_in_group, Sioux
Leonard Peltier, people.person.ethnicity, Lakota people
Ethnicity, freebase.type_profile.strict_included_types, Non-Agent
Sioux, common.topic.notable_types, Ethnicity
Ethnicity, type.type.expected_by, Ethnic population
Sihasapa, people.ethnicity.includes_groups, Lakota people
m.0b78vfj, military.military_combatant_group.combatants, Lakota people
Lakota people, military.military_combatant.military_commanders, m.010h8rf_
m.0b78pm7, military.military_combatant_group.combatants, Lakota people
Lakota people, people.ethnicity.included_in_group, Sioux
m.0b78zd0, military.military_combatant_group.combatants, Lakota people
Lakota people, people.ethnicity.people, Leonard Peltier
Ethnicity, type.type.expected_by, Includes group(s)
Lakota people, military.military_combatant.military_conflicts, m.0b795mn
m.0b795mn, military.military_combatant_group.combatants, Lakota people
m.0b78klg, military.military_combatant_group.combatants, Lakota people
Ethnicity, common.topic.article, m.03bqnc0
m.0b788wp, military.military_combatant_group.combatants, Lakota people
Ethnicity, freebase.type_profile.equivalent_topic, Ethnic group
Eddie Plenty Holes, a Sioux Indian photographed about 1899, common.image.appears_in_topic_gallery, Lakota people
Sioux, people.ethnicity.includes_groups, Oglala Lakota
m.010h8rl3, military.casualties.combatant, Lakota people
Sihasapa, people.ethnicity.included_in_group, Lakota people
Lakota people, military.military_combatant.military_conflicts, m.0b7939t
Lakota people, military.military_combatant.military_conflicts, m.0b7945l
Ethnicity, type.type.expected_by, Race/Ethnicity
Ethnicity, type.type.expected_by, Race
Topic, freebase.type_profile.published, Published
Ethnicity, type.property.expected_type, Ethnicity
Lakota people, military.military_combatant.military_conflicts, m.0b78klg
Plains Indians, common.topic.notable_types, Ethnicity
Lakota people, military.military_combatant.casualties, m.010h8rl3
Oglala Lakota, people.ethnicity.languages_spoken, English Language
Ethnicity, type.type.expected_by, Included in group(s)
m.0b78ws_, military.military_combatant_group.combatants, Lakota people
Miniconjou, people.ethnicity.included_in_group, Sioux
Mary Brave Bird, people.person.ethnicity, Sioux
m.010h8rnn, military.casualties.combatant, Lakota people
m.0b78lmt, military.military_combatant_group.combatants, Lakota people
Sioux, people.ethnicity.includes_groups, Miniconjou
m.0b78klm, military.military_combatant_group.combatants, Lakota people
Ethnicity, type.type.expected_by, Ethnicity
Ethnicity, freebase.type_profile.strict_included_types, Abstract
Rosebud Indian Reservation, location.location.people_born_here, Mary Brave Bird
Lakota people, military.military_combatant.force_deployments, m.010h8r82
m.0b7939t, military.military_combatant_group.combatants, Lakota people
Miniconjou, people.ethnicity.included_in_group, Lakota people
Lakota people, people.ethnicity.languages_spoken, English Language
Sioux, military.military_combatant.belongs_to_combatant_group, Lakota people
Ethnicity, type.property.master_property, People of this ethnicity
m.0hhyjgh, military.military_combatant_group.combatants, Lakota people
Lakota people, common.topic.image, Eddie Plenty Holes, a Sioux Indian photographed about 1899
Rosebud Indian Reservation, location.location.people_born_here, Leonard Crow Dog
Lakota people, people.ethnicity.languages_spoken, Lakota Language
Lakota people, people.ethnicity.languages_spoken, English Language
Sihasapa, common.topic.notable_for, g.125h4qvqm
Lakota people, military.military_combatant.military_conflicts, m.0b788wp
Rosebud Indian Reservation, location.us_indian_reservation.tribes, Lakota people
m.0b78bh_, military.military_combatant_group.combatants, Lakota people
Oglala Lakota, common.topic.notable_types, Ethnicity
m.0b799nm, military.military_combatant_group.combatants, Lakota people
Ethnicity, freebase.type_hints.included_types, Topic
Miniconjou, common.topic.notable_types, Ethnicity
Ethnicity, base.descriptive_names.names.descriptive_name, m.011vfn5d
Lakota people, common.topic.notable_types, Ethnicity
Lakota people, people.ethnicity.includes_groups, Sans Arc
Leonard Crow Dog, people.person.place_of_birth, Rosebud Indian Reservation
Geographic distribution, type.property.schema, Ethnicity
Lakota people, military.military_combatant.military_conflicts, m.0b78klm
m.0b79bsy, military.military_combatant_group.combatants, Lakota people
Lakota people, military.military_combatant.military_conflicts, m.0b78bh_
Sioux, people.ethnicity.includes_groups, Sans Arc
Lakota people, military.military_combatant.military_conflicts, m.0hhyjgh
Hunkpapa, common.topic.notable_types, Ethnicity
Lakota people, people.ethnicity.people, Mary Brave Bird
Ethnicity, type.type.domain, People
Mary Brave Bird, people.person.place_of_birth, Rosebud Indian Reservation
Oglala Lakota, people.ethnicity.languages_spoken, Lakota Language
Lakota people, people.ethnicity.includes_groups, Hunkpapa
m.0bd4zyf, military.military_combatant_group.combatants, Lakota people
m.0bgdsj_, military.military_command.military_combatant, Lakota people
Lakota people, people.ethnicity.includes_groups, Sihasapa
Lakota people, people.ethnicity.included_in_group, Plains Indians
Sans Arc, people.ethnicity.included_in_group, Lakota people
m.010h8rf_, military.military_command.military_combatant, Lakota people
Plains Indians, people.ethnicity.includes_groups, Sioux
Sioux, people.ethnicity.included_in_group, Plains Indians
Sans Arc, people.ethnicity.included_in_group, Sioux
Ethnicity, type.type.properties, People of this ethnicity
Lakota people, military.military_combatant.military_conflicts, m.0b799nm
Lakota people, people.ethnicity.languages_spoken, Lakota Language
Ethnicity, type.type.expected_by, Applies to
Oglala Lakota, people.ethnicity.included_in_group, Lakota people
Plains Indians, people.ethnicity.includes_groups, Oglala Lakota
m.010h8r25, military.military_command.military_combatant, Lakota people
Lakota people, military.military_combatant.military_conflicts, m.0b78zd0
Hunkpapa, people.ethnicity.included_in_group, Plains Indians
Ethnicity, type.type.properties, Population
Ethnicity, type.type.properties, Geographic distribution
Plains Indians, people.ethnicity.includes_groups, Hunkpapa
Lakota people, military.military_combatant.military_conflicts, m.0b78lmt
Sans Arc, common.topic.notable_types, Ethnicity
Lakota people, military.military_combatant.military_conflicts, m.0g5vgw8
Lakota people, common.topic.image, Lakota portraits
Two Kettles, people.ethnicity.included_in_group, Lakota people
Lakota people, military.military_combatant.casualties, m.010h8rnn
Sioux, people.ethnicity.includes_groups, Lakota people
Ethnicity, type.type.properties, Includes group(s)
m.010h8rdh, military.military_command.military_combatant, Lakota people
Geographic distribution, rdf-schema#domain, Ethnicity
Lakota people, common.topic.article, m.0fk3l
Ethnicity, rdf-schema#range, Ethnicity
Ethnicity, freebase.type_profile.published, Published
Sioux, people.ethnicity.languages_spoken, English Language
Leonard Crow Dog, people.person.ethnicity, Lakota people
m.010h8r82, military.force_strength.combatant, Lakota people
Lakota people, military.military_combatant.military_conflicts, m.0b6y43q
Lakota people, military.military_combatant.military_commanders, m.010h8r25
Lakota people, military.military_combatant.military_conflicts, m.0bd4zyf
Sioux, people.ethnicity.people, Mary Brave Bird
Lakota people, military.military_combatant.includes_allies, Sioux
Hunkpapa, people.ethnicity.included_in_group, Sioux
Lakota people, people.ethnicity.includes_groups, Oglala Lakota
Lakota people, military.military_combatant.military_conflicts, m.0b78jqb
Lakota people, military.military_combatant.military_conflicts, m.0b79bsy
Lakota portraits, common.image.appears_in_topic_gallery, Lakota people
Sihasapa, common.topic.notable_types, Ethnicity
Lakota people, people.ethnicity.includes_groups, Two Kettles
Ethnicity, type.type.expected_by, Member of indigenous group
Ethnicity, type.type.properties, Included in group(s)
Lakota people, military.military_combatant.military_commanders, m.0bgdsj_
Sioux, people.ethnicity.includes_groups, Hunkpapa
Ethnicity, freebase.type_profile.kind, Classification
Lakota people, military.military_combatant.military_commanders, m.010h8rdh
Lakota people, military.military_combatant.military_conflicts, m.0b78pm7
Lakota people, people.ethnicity.includes_groups, Miniconjou
Lakota people, people.american_indian_group.us_indian_reservations, Rosebud Indian Reservation
Mary Brave Bird, people.person.ethnicity, Lakota people
Ethnicity, freebase.type_profile.strict_included_types, Topic
m.0b6y43q, military.military_combatant_group.combatants, Lakota people
Sihasapa, common.topic.article, m.020687
m.0b78jqb, military.military_combatant_group.combatants, Lakota people

Answer: English Language
Lakota Language