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 college did the public speaker who spoke about education reform graduate from? 
Knowledge Triplets: m.0wkdssr, education.education.institution, Columbia College of Columbia University in the City of New York
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.09j06xp
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svxgnq
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw11bx
m.05yzm_8, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0w5gtkp
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0zt21xx
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw0wx6
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw2zf7
m.02wpft3, education.education.institution, Columbia University
m.0svzf31, education.education.institution, Columbia College of Columbia University in the City of New York
m.0svymvw, education.education.institution, Columbia College of Columbia University in the City of New York
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0h41znq
m.0svz2_p, education.education.institution, Columbia College of Columbia University in the City of New York
m.06wh0l_, education.education.institution, Columbia College of Columbia University in the City of New York
Education reform, common.topic.notable_for, g.1257qk2wd
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.02wnwkx
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svw11k
m.02wmry3, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svykds
m.0gxsdd7, education.education.institution, Columbia University
Columbia University Mailman School of Public Health, education.university.departments, Columbia University Department of Sociomedical Sciences
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0w7z83r
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.099r32g
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svw3wn
Education reform, book.book_subject.works, Left Back: A Century of Failed School Reforms
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0z_rnym
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svyk1n
m.05y_4h3, education.education.institution, Columbia University
g.11bv5stnf_, education.education.institution, Columbia College of Columbia University in the City of New York
Columbia University Mailman School of Public Health, education.university.departments, Columbia University Department of Epidemiology
Education reform, film.film_subject.films, Tom Brown's School Days
m.0gmjksz, education.education.institution, Columbia University
m.0mzmh14, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0jx6xf1
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw25bs
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svz2_p
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw2yqg
Columbia University Mailman School of Public Health, education.university.departments, Columbia University Department of Biostatistics
m.04hqch7, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svz5zk
m.04hbfm6, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0123wtt9
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0n157qx
m.02wpfd5, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.04fvcgy
m.0sw0wx6, education.education.institution, Columbia College of Columbia University in the City of New York
m.0b6wm_v, education.education.institution, Columbia University
m.02wmyd4, education.education.institution, Columbia University
m.0n118_y, education.education.institution, Columbia College of Columbia University in the City of New York
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0wkvqn1
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw2kgk
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svv6sz
m.05yyy73, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svx5mz
Columbia University Mailman School of Public Health, education.educational_institution.parent_institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0n0xkvq
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0fq7x9c
Columbia University Mailman School of Public Health, education.educational_institution.students_graduates, m.0svxgxl
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0n0ljrm
m.02wp1_3, education.education.institution, Columbia University
m.0svw_08, education.education.institution, Columbia College of Columbia University in the City of New York
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.05pvs9w
m.04hllds, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw0gds
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.04m0z4v
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0n1hxbn
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svxwxl
m.04fmll_, education.education.institution, Columbia University
m.0n0rt_6, education.education.institution, Columbia University
Education reform, common.topic.notable_types, Literature Subject
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0pcmhr3
m.05y_4m2, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svzvw9
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0k3gpvv
m.0svzhy2, education.education.institution, Columbia University
m.0pcmhr3, education.education.institution, Columbia College of Columbia University in the City of New York
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svx20m
Columbia University Mailman School of Public Health, education.university.departments, Columbia University Department of Health Policy and Management
m.09dx683, education.education.institution, Columbia University
m.0n1ltm3, education.education.institution, Columbia College of Columbia University in the City of New York
m.0gh9_z4, education.education.institution, Columbia College of Columbia University in the City of New York
m.04hbdn_, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svywg1
m.05yyzl9, education.education.institution, Columbia University
m.04mk299, education.education.institution, Columbia College of Columbia University in the City of New York
m.02kypw4, education.education.institution, Columbia College of Columbia University in the City of New York
m.03p72_v, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0h7ttth
m.0sw1w_b, education.education.institution, Columbia College of Columbia University in the City of New York
Diane Ravitch, education.education.student, m.02wng19
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0n0vkzb
m.0j31vdq, event.speech_or_presentation.speech_topic, Education reform
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw0ytq
m.0sw3mw3, education.education.institution, Columbia College of Columbia University in the City of New York
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svwrd2
m.04lt3y7, education.education.institution, Columbia University
m.05yy_j7, education.education.institution, Columbia University
m.07yy3y5, education.education.institution, Columbia University
m.05yyzp8, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.06wh0l_
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0n0f9mr
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0n1mz7g
m.0czvwb8, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0dw9l7y
m.04q12_3, education.education.institution, Columbia University
m.0gggky5, education.education.institution, Columbia University
Columbia University Mailman School of Public Health, education.educational_institution.students_graduates, m.0ggh8ns
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0wj11mr
m.0wlh8t5, education.education.institution, Columbia College of Columbia University in the City of New York
m.03mk_43, education.education.institution, Columbia University
m.0svvg58, education.education.institution, Columbia College of Columbia University in the City of New York
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0cpkxr8
m.0n0ylh8, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0b78myb
m.0w5b8bc, education.education.institution, Columbia University
m.07zqq_8, education.education.institution, Columbia University
m.0sw28d6, education.education.institution, Columbia College of Columbia University in the City of New York
Columbia University Mailman School of Public Health, education.educational_institution.students_graduates, m.0h9fhf2
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.09vmjtg
m.02_6r81, education.education.institution, Columbia University
m.0n1mdb7, education.education.institution, Columbia University
m.05y_7d3, education.education.institution, Columbia University
m.0sw1_ly, education.education.institution, Columbia College of Columbia University in the City of New York
m.04ynvhj, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw33ng
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw2swz
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0wlxq5t
Tom Brown's School Days, film.film.subjects, Education reform
m.0svxq7_, education.education.institution, Columbia College of Columbia University in the City of New York
m.0bdvk24, education.education.institution, Columbia University
m.04hqsn7, education.education.institution, Columbia University
m.02wm_p8, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svynk8
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw290r
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.04m10jn
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0pcmfzz
m.0jzrkd_, education.education.institution, Columbia University
m.0jzrld8, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0wk0w6h
m.0wkg_9f, education.education.institution, Columbia College of Columbia University in the City of New York
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0wkb8tn
m.02wmyy3, education.education.institution, Columbia University
m.0czz0f7, education.education.institution, Columbia University Mailman School of Public Health
m.0w579_r, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0w572dj
m.0jzrjk8, education.education.institution, Columbia University
m.0svxgxl, education.education.institution, Columbia University Mailman School of Public Health
m.05yyy89, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.062ypcy
m.02wn48x, education.educational_institution.students_graduates, Columbia University
m.0ybjnk4, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0wkg_9f
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svvlhl
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svwdfn
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0n0lbnz
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0wk_3bm
m.0w7z5bh, education.education.institution, Columbia University Mailman School of Public Health
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svz69d
m.02wng19, education.educational_institution.students_graduates, Columbia University
m.04hkqt8, education.education.institution, Columbia University
m.04dnxdg, education.education.institution, Columbia University
m.04hxbw8, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0zddghj
m.0gtzf_v, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0w59y99
m.05yyq_c, education.education.institution, Columbia University
m.04hwz_3, education.education.institution, Columbia University
m.0n13mh8, education.education.institution, Columbia College of Columbia University in the City of New York
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0k3gnsm
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.04mk299
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0n0zcnn
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.02wn19k
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svvr_h
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svxjn6
m.0svynk8, education.education.institution, Columbia College of Columbia University in the City of New York
m.05y_3l5, education.education.institution, Columbia University
m.0ggggd_, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svtgy9
m.0667h_v, education.education.institution, Columbia University
m.05y_p_1, education.education.institution, Columbia University
Columbia University Mailman School of Public Health, education.educational_institution.students_graduates, m.0czz0f7
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.04yvssw
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svy6ys
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0n15kyd
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0n1ltm3
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0n0g5yk
m.0svtgy9, education.education.institution, Columbia College of Columbia University in the City of New York
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0fq7wvk
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.09hxxsx
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw22jp
m.0667y_9, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svsg8q
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.011z0gy3
m.011z0gy3, education.education.institution, Columbia College of Columbia University in the City of New York
m.05yyy24, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svx15n
m.02wnm_1, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw3nj4
m.0svy7n_, education.education.institution, Columbia College of Columbia University in the City of New York
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svy7n_
m.0hnjbx8, education.education.institution, Columbia University
m.02wpq_6, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svxwy1
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw0dkg
Columbia University Mailman School of Public Health, education.educational_institution.students_graduates, m.0w7z5bh
m.04m6010, education.education.degree, Master of Public Administration
m.02wpy6m, education.education.institution, Columbia College of Columbia University in the City of New York
m.0dw0s6y, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svymgn
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0w7ztml
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0n0ssdz
m.04hfhnt, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw2xss
m.0zddghj, education.education.institution, Columbia College of Columbia University in the City of New York
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svstj1
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0dw78mh
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0n9yljl
Bachelor of Arts, education.education.degree, m.02wn48x
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svz3wp
m.0n1k28_, education.education.institution, Columbia College of Columbia University in the City of New York
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0k3gpgp
Education reform, event.speech_topic.speeches_or_presentations_on_this_topic, m.0j31vdq
m.010vsw_v, education.education.institution, Columbia University
m.02wmyh1, education.education.institution, Columbia University
m.04d0_xv, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0n0vfch
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw1blw
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0pcmh1j
m.0gggktm, education.education.institution, Columbia University
Left Back: A Century of Failed School Reforms, book.author.works_written, Diane Ravitch
m.0hzhjkd, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw2zj8
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw3mw3
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw3myp
m.0znmjkd, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svzhqm
m.09vvzbc, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svyp3h
m.02wm_r1, education.education.institution, Columbia University
Education reform, common.topic.article, m.02mdn
m.0sw0mv9, education.education.institution, Columbia College of Columbia University in the City of New York
m.0zrjkbl, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0n19zw4
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0w5h7pl
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw0mv9
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0hzvtpt
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svwprh
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw28d6
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0pcmggk
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.02kypw4
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0whwjp2
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw23sk
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0wkdssr
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.09hzwtv
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw11vh
m.09hzwtv, education.education.institution, Columbia College of Columbia University in the City of New York
m.0w5kt_h, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw1w_b
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.02wpy6m
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw3254
m.0svxjn6, education.education.institution, Columbia College of Columbia University in the City of New York
m.09vjlg8, education.education.institution, Columbia University
Columbia University Mailman School of Public Health, education.university.departments, Columbia University Department of Policy and Family Health
m.04mjy4c, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw3s8q
m.0sw3r8_, education.education.institution, Columbia College of Columbia University in the City of New York
m.07727_9, education.education.institution, Columbia College of Columbia University in the City of New York
m.05yyzf3, education.education.institution, Columbia University
m.02wnq_8, education.education.institution, Columbia University
m.0svvr_h, education.education.institution, Columbia College of Columbia University in the City of New York
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw3r8_
m.0h9fhf2, education.education.institution, Columbia University Mailman School of Public Health
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw2sb4
m.0ggh8ns, education.education.institution, Columbia University Mailman School of Public Health
m.04lp7y8, education.education.institution, Columbia University
m.02wnwm9, education.education.institution, Columbia University
m.0zffgd4, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0svymvw
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.01112hhh
m.05y_jx8, education.education.institution, Columbia University
Columbia College of Columbia University in the City of New York, education.educational_institution.students_graduates, m.0sw2cy2

Answer: Columbia University