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 judge appointed to the Supreme Court, was appointed to his/her government position by Barack Obama? 
Knowledge Triplets: Barack Obama, government.political_appointer.appointees, m.0wzl8x_
Barack Obama, common.image.appears_in_topic_gallery, bobbi4freedom
Barack Obama, people.person.education, m.02nqgmw
Barack Obama, Sr., people.person.profession, Politician
United States Attorney General, base.obamabase.cabinet_position.potential_cabinet_members, Janet Napolitano
Law professor, people.person.profession, Elena Kagan
Barack Obama in His Own Words, book.book_edition.isbn, 9780786720576
Barack Obama, government.political_appointer.appointees, m.010g2c43
m.0q4ng3y, government.government_position_held.appointed_by, Barack Obama
m.05gmrc3, base.firsts.first_achievement.first, Barack Obama
Barack Obama, government.political_appointer.appointees, m.04_5lb8
Barack Obama, Sr., people.person.children, Bernard Obama
Barack Obama, government.political_appointer.appointees, m.0tm2t1f
Law clerk, Justice William O. Douglas, United States Supreme Court, business.job_title.people_with_this_title, m.0g7mqhp
m.0hn35k1, people.appointment.appointed_role, Chief Justice of the United States
Barack Obama, people.person.employment_history, m.02nqgy7
m.05bhv8k, government.government_position_held.appointed_by, Barack Obama
Gender, freebase.valuenotation.is_reviewed, Elena Kagan
Barack Obama, government.politician.government_positions_held, m.04s_2dh
Barack Obama, government.political_appointer.appointees, m.05gh7qx
Barack Obama, people.person.education, m.02nqgpk
Barack Obama, people.person.profession, Writer
m.05ftbw9, government.government_position_held.appointed_by, Barack Obama
Chief Justice of the United States, people.appointed_role.appointment, m.0hmtft1
m.05bj120, government.government_position_held.appointed_by, Barack Obama
m.0j34rt6, government.government_position_held.appointed_by, Barack Obama
Barack Obama, people.person.profession, Politician
m.010hc1p6, government.government_position_held.appointed_by, Barack Obama
Barack Obama, people.person.sibling_s, m.0n4sqkk
m.0jtlxf_, government.government_position_held.appointed_by, Barack Obama
Barack Obama, people.person.nationality, United States of America
Supreme Court of California, law.court.judges, m.05kdtmj
Massachusetts Supreme Judicial Court, government.governmental_body.offices_positions, Associate Justice of the Massachusetts Supreme Judicial Court
m.05bj0_8, government.government_position_held.appointed_by, Barack Obama
m.010qyt8y, government.government_position_held.appointed_by, Barack Obama
Hillary Rodham Clinton, base.obamabase.cabinet_member.cabinet_position, United States Secretary of State
Barack Obama, government.political_appointer.appointees, m.0q4lvc7
Barack Obama in His Own Words, common.topic.notable_for, g.1258yx_5g
m.0458fpt, government.government_position_held.office_position_or_title, Associate Justice of the Massachusetts Supreme Judicial Court
Barack Obama, government.political_appointer.appointees, m.05bhv8k
m.0458fn4, government.government_position_held.governmental_body, Massachusetts Supreme Judicial Court
Barack Obama, government.political_appointer.appointees, m.05ctx2h
Barack Obama, government.political_appointer.appointees, m.05bj120
m.010p3jbd, government.government_position_held.appointed_by, Barack Obama
m.09qggj9, award.ranking.item, Barack Obama
m.05lmlyn, government.government_position_held.appointed_by, Barack Obama
m.063wq6k, base.popstra.legal_dispute.defendant, Barack Obama
Supreme Court of the United States, common.topic.image, US Supreme Court Building
Barack Obama, government.political_appointer.appointees, m.052lwd3
Barack Obama, government.political_appointer.appointees, m.010g2xdb
m.010g2c43, government.government_position_held.appointed_by, Barack Obama
Barack Obama, people.person.education, m.012m9zwm
Barack Obama, people.person.sibling_s, m.0kv53fr
Barack Obama, government.political_appointer.appointees, m.0j35vth
United States of America, people.person.nationality, Elena Kagan
Barack Obama, people.person.sibling_s, m.0n4sql0
Joe Biden, government.us_vice_president.to_president, Barack Obama
m.0nd7wz9, government.government_position_held.appointed_by, Barack Obama
Chief Justice of the United States, people.appointed_role.appointment, m.0hn34jr
m.0458fn4, government.government_position_held.office_position_or_title, Associate Justice of the Massachusetts Supreme Judicial Court
m.0hmtgdx, people.appointment.appointed_role, Chief Justice of the United States
David Ndesandjo, people.person.parents, Barack Obama, Sr.
Barack Obama, government.political_appointer.appointees, m.0jtl_wm
m.05gh7qx, government.government_position_held.appointed_by, Barack Obama
m.052mbx6, government.government_position_held.appointed_by, Barack Obama
m.0wh2twv, government.government_position_held.governmental_body, Massachusetts Supreme Judicial Court
m.0w2cph_, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.politician.party, m.03gjhww
m.052lwd3, government.government_position_held.appointed_by, Barack Obama
Reinhold Niebuhr, influence.influence_node.influenced, Barack Obama
m.03gjhww, government.political_party_tenure.politician, Barack Obama
Barack Obama, government.political_appointer.appointees, m.0bvbn3r
Barack Obama, government.political_appointer.appointees, m.05bh_yd
Barack Obama, government.political_appointer.appointees, m.0bvbn3r
BarackObama, internet.blog.blogger, Barack Obama
m.05ctx2h, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.political_appointer.appointees, m.09w3qtm
m.04wrwjv, base.firsts.first_achievement.first, Barack Obama
Barack Obama, people.person.education, m.012m11bj
Barack Obama, government.political_appointer.appointees, m.05bh_ms
Barack Obama, internet.blogger.blog, BarackObama
m.010g2xdb, government.government_position_held.appointed_by, Barack Obama
Barack Obama, people.person.children, Malia Ann Obama
Barack Obama, people.person.places_lived, m.03xdtyc
Supreme Court of the United States, law.court.courthouse, m.064gmmw
Barack Obama, Sr., people.person.children, Abo Obama
Barack Obama, government.political_appointer.appointees, m.010qp4_t
m.04s_2dh, government.government_position_held.office_holder, Barack Obama
m.064d51m, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.political_appointer.appointees, m.0w25ghz
m.05g438r, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.political_appointer.appointees, m.0k9_6d4
Barack Obama, government.political_appointer.appointees, m.010g2x8g
Barack Obama, government.political_appointer.appointees, m.05kcjbj
Barack Obama, common.topic.article, m.09s453y
Supreme Court of the United States, common.topic.webpage, m.042249_
m.0tlzpxk, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.political_appointer.appointees, m.0zrhnnr
Barack Obama, people.person.profession, Lawyer
Barack Obama, government.political_appointer.appointees, m.05g438r
Barack Obama, common.topic.notable_for, g.125920_xt
Supreme Court of the United States, common.topic.article, m.07szc
m.0v4q6n5, government.government_position_held.appointed_by, Barack Obama
m.05bh_kg, government.government_position_held.appointed_by, Barack Obama
m.0q4mpmt, government.government_position_held.appointed_by, Barack Obama
Supreme Court of the United States, law.court.jurisdiction, United States of America
m.010g2x8g, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.political_appointer.appointees, m.09rg1bz
Barack Obama, people.person.places_lived, m.04s_x47
m.0458fpl, government.government_position_held.office_position_or_title, Associate Justice of the Massachusetts Supreme Judicial Court
Barack Obama, government.political_appointer.appointees, m.05pv1bq
m.0j35vth, government.government_position_held.appointed_by, Barack Obama
Chief Justice of the United States, people.appointed_role.appointment, m.0hn35sw
m.05bj04r, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.political_appointer.appointees, m.0jtlxf_
Barack Obama, people.person.religion, Christianity
Barack Obama, government.political_appointer.appointees, m.05bj04r
Barack Obama, government.political_appointer.appointees, m.05gwyg2
m.0r5y214, government.government_position_held.appointed_by, Barack Obama
Eric Holder, base.obamabase.cabinet_member.cabinet_position, United States Attorney General
United States presidential election, 2008, government.election.winner, Barack Obama
m.03xdtyk, people.place_lived.person, Barack Obama
Barack Obama, government.politician.election_campaigns, Barack Obama presidential primary campaign, 2008
Barack Obama, people.person.profession, Law professor
m.0458fq5, government.government_position_held.governmental_body, Massachusetts Supreme Judicial Court
Supreme Court of the United States, common.topic.webpage, m.02h6wqn
Barack Obama, people.person.parents, Ann Dunham
m.05g2cp1, government.government_position_held.appointed_by, Barack Obama
Chief Justice of the United States, people.appointed_role.appointment, m.0hn354s
Barack Obama, government.political_appointer.appointees, m.0wkxqyy
Barack Obama, base.crime.lawyer.lawyer_type, Constitutional law
Eric Holder, base.obamabase.possible_cabinet_member.cabinet_position, United States Attorney General
Barack Obama, government.political_appointer.appointees, m.0nd7wz9
m.0tm2t1f, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.political_appointer.appointees, m.05bh_kg
Barack Obama, government.us_president.vice_president, Joe Biden
Chief Justice of the United States, people.appointed_role.appointment, m.0hn35mm
m.0hn34gb, law.judicial_tenure.judge, William Rehnquist
m.0458fp6, government.government_position_held.office_position_or_title, Associate Justice of the Massachusetts Supreme Judicial Court
m.0k9_6d4, government.government_position_held.appointed_by, Barack Obama
m.0q4lvc7, government.government_position_held.appointed_by, Barack Obama
m.0k9_4xg, government.government_position_held.appointed_by, Barack Obama
Barack Obama, people.person.places_lived, m.03xdty5
Massachusetts Supreme Judicial Court, government.governmental_body.offices_positions, Chief Justice of the Massachusetts Supreme Judicial Court
Barack Obama, government.political_appointer.appointees, m.05lmlyn
Barack Obama, government.political_appointer.appointees, m.0wzl8h_
m.05gwyg2, government.government_position_held.appointed_by, Barack Obama
Barack Obama, common.image.appears_in_topic_gallery, Barack Obama
Supreme Court of California, law.court.judges, m.05kdtmy
m.05f_33k, government.government_position_held.appointed_by, Barack Obama
Barack Obama, Sr., people.person.children, Auma Obama
m.05bh_5w, government.government_position_held.appointed_by, Barack Obama
m.04s_x47, people.place_lived.person, Barack Obama
Chief Justice of the United States, people.appointed_role.appointment, m.0hmtld3
m.0k9_61x, government.government_position_held.appointed_by, Barack Obama
m.03h9hnh, government.legislative_committee_membership.member, Barack Obama
Barack Obama, freebase.valuenotation.is_reviewed, Place of birth
Barack Obama, people.person.profession, Law professor
m.05bp2yr, government.government_position_held.appointed_by, Barack Obama
Chief Justice of the United States, people.appointed_role.appointment, m.0hn358_
Barack Obama, people.person.quotations, Yes we can!
Barack Obama, government.political_appointer.appointees, m.0k06hnf
Chief Justice of the United States, people.appointed_role.appointment, m.0hmsrqy
Barack Obama, freebase.valuenotation.is_reviewed, Spouse (or domestic partner)
m.0glx1wx, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.politician.government_positions_held, m.03h9hn4
m.0wzl8h_, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.political_appointer.appointees, m.04_2vlm
Supreme Court of California, law.court.judges, m.05kdtlz
Barack Obama, people.person.sibling_s, m.0kv53ff
m.07nt04k, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.political_appointer.appointees, m.052mbx6
m.05bp1tv, government.government_position_held.appointed_by, Barack Obama
m.0jb89c0, government.government_position_held.appointed_by, Barack Obama
m.0jtmkth, government.government_position_held.appointed_by, Barack Obama
m.0hmtld3, people.appointment.appointed_role, Chief Justice of the United States
Barack Obama, government.politician.election_campaigns, Barack Obama presidential campaign, 2012
Barack Obama, government.politician.election_campaigns, Barack Obama 2004 US Senate Campaign
m.0znj0g4, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.political_appointer.appointees, m.010g2w70
Barack Obama, government.political_appointer.appointees, m.0r5y214
m.0458fnv, government.government_position_held.governmental_body, Massachusetts Supreme Judicial Court
Barack Obama, common.topic.article, m.02wh0cm
m.0hn34jr, people.appointment.appointed_role, Chief Justice of the United States
Chief Justice of the United States, people.appointed_role.appointment, m.0hn34b5
Barack Obama, people.person.education, m.012m4x3m
Barack Obama, government.political_appointer.appointees, m.0115sj6s
Barack Obama, people.person.nationality, United States of America
Supreme Court of the United States, common.topic.webpage, m.0bhg2cz
m.09vkg_2, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.political_appointer.appointees, m.05nd5t7
m.05pv1bq, government.government_position_held.appointed_by, Barack Obama
Barack Obama, people.person.sibling_s, m.0n4sqk2
Barack Obama, people.person.employment_history, m.02nqgsc
m.05bht4v, government.government_position_held.appointed_by, Barack Obama
m.0hn34dz, people.appointment.appointed_role, Chief Justice of the United States
Barack Obama, government.political_appointer.appointees, m.0k9_61x
Barack Obama, government.politician.election_campaigns, Barack Obama 1996 Illinois Senate Campaign
Barack Obama, common.topic.article, m.02mjn1
Barack Obama, government.political_appointer.appointees, m.0tlzpxk
Barack Obama, government.political_appointer.appointees, m.0jb8k42
m.09knk78, government.government_position_held.appointed_by, Barack Obama
William Rehnquist, law.judge.courts, m.0hn34gb
Barack Obama, people.person.ethnicity, Multiracial American
Barack Obama, government.political_appointer.appointees, m.05bp2yr
m.0zrhnnr, government.government_position_held.appointed_by, Barack Obama
m.0527js1, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.political_appointer.appointees, m.09vkg_2
m.0wzl8x_, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.political_appointer.appointees, m.05ftbw9
Barack Obama, government.political_appointer.appointees, m.052m8b1
Barack Obama, government.political_appointer.appointees, m.05bj0_8
Barack Obama, government.political_appointer.appointees, m.05bh__x
Barack Obama, government.political_appointer.appointees, m.0k9_4xg
Barack Obama, common.image.size, m.0klz8m
Barack Obama, government.political_appointer.appointees, m.05v3kv0
Barack Obama, people.person.education, m.02nqgn2
Barack Obama, people.person.profession, Lawyer
Barack Obama, government.politician.legislative_committees_served_on, m.03h9hnh
Place of birth, freebase.valuenotation.is_reviewed, Elena Kagan
m.0w25ghz, government.government_position_held.appointed_by, Barack Obama
Barack Obama, people.person.education, m.0nbyhy_
Chief Justice of the United States, people.appointed_role.appointment, m.063dqnv
Barack Obama, government.political_appointer.appointees, m.0r60ybv
m.05bhs1w, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.political_appointer.appointees, m.05f_33k
m.0wkxqyy, government.government_position_held.appointed_by, Barack Obama
Supreme Court of the United States, government.governmental_body.body_this_is_a_component_of, Federal judiciary of the United States
m.05g5040, government.government_position_held.appointed_by, Barack Obama
m.05kcjbj, government.government_position_held.appointed_by, Barack Obama
Barack Obama, people.person.sibling_s, m.0n4sqh8
m.0hmsrqy, people.appointment.appointed_role, Chief Justice of the United States
Date of birth, freebase.valuenotation.is_reviewed, Elena Kagan
Supreme Court of the United States, government.governmental_body.offices_positions, Chief Justice of the United States
Barack Obama, people.person.employment_history, m.02nqgq1
Ann Dunham, people.person.children, Barack Obama
Supreme Court of California, law.court.judges, m.05kdtmb
Barack H. Obama: The Unauthorized Biography, common.topic.notable_for, g.125f8s1ny
Barack Obama, freebase.valuenotation.is_reviewed, Gender
m.0458fpt, government.government_position_held.governmental_body, Massachusetts Supreme Judicial Court
m.09w3qtm, government.government_position_held.appointed_by, Barack Obama
Barack Obama, people.person.education, m.012l94sv
Barack Obama, Sr., people.person.spouse_s, m.040fvqp
Barack Obama, government.political_appointer.appointees, m.05bh_5w
m.010qp4_t, government.government_position_held.appointed_by, Barack Obama
Barack Obama, common.topic.notable_for, g.1258j10lr
Barack Obama, Sr., people.person.children, David Ndesandjo
Barack Obama, people.person.ethnicity, Irish American
Barack Obama, freebase.valuenotation.is_reviewed, Children
Barack Obama, government.political_appointer.appointees, m.05bp1tv
Supreme Court of the United States, common.topic.webpage, m.0b6rm1f
m.0115sj6s, government.government_position_held.appointed_by, Barack Obama
Barack Obama, people.person.ethnicity, English American
Barack Obama, people.person.profession, Author
Barack Obama, government.political_appointer.appointees, m.0v4q6n5
Chief Justice of the United States, people.appointed_role.appointment, m.0hn34dz
m.0w8v5d0, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.political_appointer.appointees, m.010p3jbd
m.0jtl_wm, government.government_position_held.appointed_by, Barack Obama
Chief Justice of the United States, people.appointed_role.appointment, m.0hmtbtg
Barack Obama, government.political_appointer.appointees, m.09knk78
Chief Justice of the United States, government.government_office_or_title.governmental_body_if_any, Supreme Court of the United States
m.03xdty5, people.place_lived.person, Barack Obama
Barack Obama, government.political_appointer.appointees, m.0w8v5d0
Barack Obama, government.political_appointer.appointees, m.064d51m
Barack Obama, government.political_appointer.appointees, m.010qyt8y
Barack Obama, government.political_appointer.appointees, m.0j34rt6
Supreme Court of the United States, common.resource.annotations, m.02h6wqn
Barack Obama, government.political_appointer.appointees, m.04_5kfv
m.0bvbn3r, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.political_appointer.appointees, m.0118nrhq
Barack Obama, government.political_appointer.appointees, m.0znj0g4
Barack Obama, people.person.sibling_s, m.0n4sqkd
President of the United States, common.topic.image, Official portrait of Barack Obama
Barack Obama, people.person.employment_history, m.02nqgqh
m.052m8b1, government.government_position_held.appointed_by, Barack Obama
Lawyer, people.person.profession, Elena Kagan
Barack Obama, government.political_appointer.appointees, m.05bj130
Barack Obama, people.person.children, Natasha Obama
Barack Obama, government.political_appointer.appointees, m.0w2cph_
m.05bh_20, government.government_position_held.appointed_by, Barack Obama
Barack Obama, freebase.valuenotation.is_reviewed, Date of birth
Janet Napolitano, base.obamabase.possible_cabinet_member.cabinet_position, United States Attorney General
m.05gmrjl, people.place_lived.person, Barack Obama
m.046x3bs, law.judicial_tenure.judge, John Roberts
Barack Obama, Sr., people.person.religion, Islam
Barack Obama, government.political_appointer.appointees, m.05bhs1w
Barack Obama in His Own Words, common.topic.notable_for, g.125d3_x15
Chief Justice of the United States, people.appointed_role.appointment, m.0hn34q0
Chief Justice of the United States, people.appointed_role.appointment, m.0hmtgdx
President Barack Obama and the Message Beyond the Photograph, book.written_work.subjects, Government
m.05bj130, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.politician.legislative_committees_served_on, m.03h9hp_
m.04_2vlm, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.political_appointer.appointees, m.010hc1p6
United States Attorney General, base.obamabase.cabinet_position.potential_cabinet_members, Eric Holder
Barack Obama, people.person.places_lived, m.05gmrjl
Constitutional law, base.crime.lawyer_type.lawyers_of_this_type, Barack Obama
Barack Obama, government.political_appointer.appointees, m.0jb89c0
Barack Obama, people.person.education, m.0nbyhqc
Barack Obama, people.person.education, m.02nqgp6
Chief Justice of the United States, common.topic.image, Seal of the Supreme Court
m.0458fp6, government.government_position_held.governmental_body, Massachusetts Supreme Judicial Court
Barack Obama, government.political_appointer.appointees, m.07nt04k
m.04_5lb8, government.government_position_held.appointed_by, Barack Obama
Barack Obama, people.person.education, m.0nbyj44
m.0458fnv, government.government_position_held.office_position_or_title, Associate Justice of the Massachusetts Supreme Judicial Court
m.0k06hnf, government.government_position_held.appointed_by, Barack Obama
m.05bh__x, government.government_position_held.appointed_by, Barack Obama
m.03h9hp_, government.legislative_committee_membership.member, Barack Obama
m.0118nrhq, government.government_position_held.appointed_by, Barack Obama
Barack Obama, government.political_appointer.appointees, m.05bht4v
m.04_5kfv, government.government_position_held.appointed_by, Barack Obama
m.0bvbn3r, government.politician.government_positions_held, Elena Kagan
Barack Obama, government.political_appointer.appointees, m.0jtmkth
m.03xdtyc, people.place_lived.person, Barack Obama
m.09rg1bz, government.government_position_held.appointed_by, Barack Obama
m.0458fpl, government.government_position_held.governmental_body, Massachusetts Supreme Judicial Court
Supreme Court of the United States, government.governmental_body.jurisdiction, United States of America
Barack Obama, common.topic.image, Barack Obama
m.0jb8k42, government.government_position_held.appointed_by, Barack Obama
Chief Justice of the United States, people.appointed_role.appointment, m.0hn35k1
Barack Obama, government.political_appointer.appointees, m.0527js1
m.05bh_ms, government.government_position_held.appointed_by, Barack Obama
m.0458fq5, government.government_position_held.office_position_or_title, Associate Justice of the Massachusetts Supreme Judicial Court
Barack Obama, people.person.quotations, Just give it a try
m.010g2w70, government.government_position_held.appointed_by, Barack Obama
Spouse (or domestic partner), freebase.valuenotation.has_no_value, Elena Kagan
Barack Obama, people.person.places_lived, m.03xdtyk
m.03h96h6, government.government_position_held.office_holder, Barack Obama
Children, freebase.valuenotation.has_no_value, Elena Kagan
m.0dfzl4x, architecture.occupancy.occupant, Barack Obama
Barack Obama, government.politician.government_positions_held, m.03h96h6
m.05v3kv0, government.government_position_held.appointed_by, Barack Obama
m.0hn358_, people.appointment.appointed_role, Chief Justice of the United States
John Roberts, law.judge.courts, m.046x3bs
Barack Obama, government.political_appointer.appointees, m.0q4mpmt
Barack Obama, government.political_appointer.appointees, m.0glx1wx
m.05nd5t7, government.government_position_held.appointed_by, Barack Obama
Chief Justice of the United States, book.book_subject.works, Leaving the Bench: Supreme Court Justices at the End
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Answer: Elena Kagan