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: Where did the public speaker, who spoke about energy development, attend college? 
Knowledge Triplets: m.02wn39z, education.education.institution, Columbia University
m.0hgtdjn, education.education.institution, Columbia University
m.02wns4d, education.education.institution, Columbia University
m.02wpqnm, education.education.institution, Columbia University
m.02wmydf, education.education.institution, Columbia University
m.02wps66, education.education.institution, Columbia University
m.02wmxrm, education.education.institution, Columbia University
Unirac, business.business_operation.industry, Energy development
Energy development, business.industry.child_industry, Solar energy
m.0znmjkd, education.education.institution, Columbia University
m.02wmt68, education.education.institution, Columbia University
m.02wnsly, education.education.institution, Columbia University
m.02nqgmw, education.education.institution, Columbia University
m.04fntnq, education.education.institution, Columbia University
m.04hgv4w, education.education.institution, Columbia University
m.02wprnl, education.education.institution, Columbia University
m.02kdrrf, education.education.institution, Columbia University
m.02wpdng, education.education.institution, Columbia University
m.04hrymn, education.education.institution, Columbia University
m.02wnhdd, education.education.institution, Columbia University
m.02wpvjy, education.education.institution, Columbia University
m.02nqgp6, education.education.institution, Punahou School
m.02wmyy3, education.education.institution, Columbia University
Energy development, business.industry.child_industry, Geothermal energy
m.02wn9fm, education.education.institution, Columbia University
m.02wnfk7, education.education.institution, Columbia University
David Wechsler, people.person.education, m.02wpg20
Energy development, base.descriptive_names.names.descriptive_name, m.010lbg7q
m.02wmrzj, education.education.institution, Columbia University
m.02wmt4s, education.education.institution, Columbia University
m.02wnbmy, education.education.institution, Columbia University
Energy development, common.topic.image, Shell Refueller
Energy industry, business.industry.child_industry, Solar energy
m.02wprs7, education.education.institution, Columbia University
m.04hry17, education.education.institution, Columbia University
m.07y4dmr, education.education.institution, Columbia University
John R. Dunning, people.person.education, m.04hcvd8
m.02wmy4y, education.education.institution, Columbia University
m.03ltmny, education.education.institution, Columbia University
Energy development, event.speech_topic.speeches_or_presentations_on_this_topic, m.0j31vdq
m.07skgzf, education.education.institution, Columbia University
m.02wnhrn, education.education.institution, Columbia University
m.05yzhtt, education.education.institution, Columbia University
Energy development, business.industry.child_industry, Nuclear power debate
m.02wnbdt, education.education.institution, Columbia University
m.04hgkq7, education.education.institution, Columbia University
m.02wpsrn, education.education.institution, Columbia University
m.01010qvz, education.education.institution, Columbia University
m.02wn8qy, education.education.institution, Columbia University
m.04fmll_, education.education.institution, Columbia University
Energy development, business.industry.companies, Unirac
California, location.location.contains, Occidental College
m.07sklh0, education.education.institution, Columbia University
m.04hg4zm, education.education.institution, Columbia University
m.03p72ld, education.education.institution, Columbia University
m.09vjkw2, education.education.institution, Columbia University
m.02wnbfn, education.education.institution, Columbia University
m.02wnqvd, education.education.degree, PhD
m.02wpttw, education.education.institution, Columbia University
Carolyn Goodman, people.person.education, m.03p72wy
Energy development, business.industry.child_industry, Solar thermal energy
Barack Obama, people.person.education, m.0nbyhqc
Energy development, business.industry.child_industry, Space-based solar power
m.07y4fnd, education.education.institution, Columbia University
Harvesting lightning energy, business.industry.parent_industry, Energy development
m.02wpqyq, education.education.institution, Columbia University
m.02wnwtd, education.education.institution, Columbia University
Alternative energy, common.topic.notable_for, g.1yl5r3783
m.02wmyht, education.education.institution, Columbia University
Shell Refueller, common.image.appears_in_topic_gallery, Energy development
m.062ywds, education.education.institution, Columbia University
m.09j5kwn, education.education.institution, Columbia University
m.04lp7y8, education.education.institution, Columbia University
m.09sd24y, education.education.institution, Columbia University
Distributed generation, business.industry.parent_industry, Energy development
m.02wmqyf, education.education.institution, Columbia University
m.04lnh8w, education.education.institution, Columbia University
m.04lntgg, education.education.institution, Columbia University
Energy development, business.industry.child_industry, Distributed generation
Renewable energy industry, business.industry.companies, EDP Renewables North America
m.02wpgyh, education.education.institution, Columbia University
Joseph Leon Blau, people.person.education, m.02wn2vd
m.04dnxdg, education.education.institution, Columbia University
m.02wp0ll, education.education.institution, Columbia University
m.02wnlwt, education.education.institution, Columbia University
John Gassner, people.person.education, m.0109tsnf
m.02wpmhk, education.education.institution, Columbia University
m.02wnztd, education.education.institution, Columbia University
m.02wpvdb, education.education.institution, Columbia University
m.02wmqnx, education.education.institution, Columbia University
m.02wnrnk, education.education.institution, Columbia University
m.02wnmhd, education.education.institution, Columbia University
m.02wn24c, education.education.institution, Columbia University
m.064zvqy, education.education.institution, Columbia University
m.02wncrn, education.education.institution, Columbia University
m.04lnrwj, education.education.institution, Columbia University
m.02wnqvd, education.education.institution, Columbia University
m.02wpnkh, education.education.institution, Columbia University
m.02wn7y8, education.education.institution, Columbia University
m.02wmzny, education.education.institution, Columbia University
m.02wmr1y, education.education.institution, Columbia University
m.07sk8st, education.education.institution, Columbia University
m.02wnqgh, education.education.institution, Columbia University
Renewable energy industry, business.industry.companies, National Wind
m.02wp9zh, education.education.institution, Columbia University
m.062yqsq, education.education.institution, Columbia University
m.02wp2qy, education.education.institution, Columbia University
m.02wptqh, education.education.institution, Columbia University
m.02wpk4y, education.education.institution, Columbia University
m.02wpmly, education.education.institution, Columbia University
m.04hn4qr, education.education.institution, Columbia University
m.02wn28z, education.education.institution, Columbia University
m.02wnnxw, education.education.institution, Columbia University
m.02wncdz, education.education.institution, Columbia University
m.02wmqxp, education.education.institution, Columbia University
m.02wns0y, education.education.institution, Columbia University
m.02wn2vd, education.education.institution, Columbia University
m.07y4fzh, education.education.institution, Columbia University
m.04hcvd8, education.education.institution, Columbia University
m.02wnlkw, education.education.institution, Columbia University
m.0101bvtn, education.education.institution, Columbia University
m.02wpfhk, education.education.institution, Columbia University
m.0667yyy, education.education.institution, Columbia University
m.02kq26y, education.education.institution, Columbia University
Barack Obama, people.person.education, m.02nqgpk
m.02wn4yj, education.education.institution, Columbia University
Ariel Schrag, people.person.education, m.02wmvd1
Occidental College, location.location.containedby, United States of America
m.06zzrmk, education.education.institution, Columbia University
m.05yywqd, education.education.institution, Columbia University
m.07y4fmh, education.education.institution, Columbia University
m.02wnnqh, education.education.institution, Columbia University
m.02wmqnb, education.education.institution, Columbia University
Geothermal energy, business.industry.parent_industry, Energy development
m.02wpvd1, education.education.institution, Columbia University
Energy development, common.topic.image, Moss Landing Power Plant p1270026
Energy industry, business.industry.child_industry, Wind power
m.062yylp, education.education.institution, Columbia University
m.0667hny, education.education.institution, Columbia University
m.02wns49, education.education.institution, Columbia University
Barack Obama, people.person.education, m.0nbyj44
m.04mdln4, education.education.institution, Columbia University
m.02wpthk, education.education.institution, Columbia University
m.03p72wy, education.education.institution, Columbia University
m.02wmrmy, education.education.institution, Columbia University
HDI & Electricity per capita, common.image.appears_in_topic_gallery, Energy development
m.02wpf13, education.education.institution, Columbia University
m.02wn3dp, education.education.institution, Columbia University
m.02wprbr, education.education.institution, Columbia University
m.02wn4qh, education.education.institution, Columbia University
m.0102zhrg, education.education.institution, Columbia University
m.02wpjkj, education.education.institution, Columbia University
m.02nqgmw, education.education.institution, Columbia University
m.062yqgt, education.education.institution, Columbia University
m.02wpqth, education.education.institution, Columbia University
m.02wmt3r, education.education.institution, Columbia University
Energy industry, business.industry.child_industry, Geothermal energy
m.02wpf40, education.education.institution, Columbia University
Moss Landing Power Plant p1270026, common.image.appears_in_topic_gallery, Energy development
m.02wn3d9, education.education.institution, Columbia University
m.04q18zn, education.education.institution, Columbia University
m.02wnc2y, education.education.institution, Columbia University
m.0667yfz, education.education.institution, Columbia University
Energy development, base.descriptive_names.names.descriptive_name, m.010lbgnv
m.04fntny, education.education.institution, Columbia University
m.02wns4z, education.education.institution, Columbia University
John Corigliano, people.person.education, m.02wpgxg
David Ginsburg, people.person.education, m.0dw0svd
m.08d7wln, education.education.institution, Columbia University
m.02wns54, education.education.institution, Columbia University
Energy development, event.speech_topic.speeches_or_presentations_on_this_topic, m.0j31vdq
m.062yqtx, education.education.institution, Columbia University
m.02wnstz, education.education.institution, Columbia University
m.05yykqz, education.education.institution, Columbia University
Wind power, business.industry.parent_industry, Energy development
Hydrogen economy, business.industry.parent_industry, Energy development
m.0ztl4gr, education.education.specialization, High Energy Physics
m.02wmz41, education.education.institution, Columbia University
m.02wnnb6, education.education.institution, Columbia University
m.03p72yn, education.education.institution, Columbia University
Energy development, common.topic.image, HDI & Electricity per capita
m.07sk85d, education.education.institution, Columbia University
Alternative energy, common.topic.article, m.03bwzg0
m.09j57zh, education.education.institution, Columbia University
m.02wppzh, education.education.institution, Columbia University
m.02wnq8z, education.education.institution, Columbia University
m.02wpfd5, education.education.institution, Columbia University
m.02wnvdp, education.education.institution, Columbia University
Energy development, common.topic.article, m.02mg6q
m.02wpfl2, education.education.institution, Columbia University
m.04lnzzl, education.education.institution, Columbia University
m.02wn9yb, education.education.institution, Columbia University
m.0n1l1vd, education.education.institution, Columbia University
Alternative energy, business.industry.companies, AFC Energy
m.02wmtkj, education.education.institution, Columbia University
m.07y4glw, education.education.institution, Columbia University
Energy development, business.industry.child_industry, Alternative energy
David Nasaw, people.person.education, m.062yxyg
Lviv Insulator Company, business.business_operation.industry, Energy development
m.02wpfrb, education.education.institution, Columbia University
m.062yzjw, education.education.institution, Columbia University
m.0101mwvz, education.education.institution, Columbia University
m.02wmvdb, education.education.institution, Columbia University
m.062yw9y, education.education.institution, Columbia University
m.062yvzs, education.education.institution, Columbia University
m.0svsndt, education.education.institution, Columbia University
m.02wpkkd, education.education.institution, Columbia University
m.0nbyhqc, education.education.institution, Noelani Elementary School
m.02wmznn, education.education.institution, Columbia University
m.02wmqhr, education.education.institution, Columbia University
m.02nqgpk, education.education.institution, Occidental College
m.02wn7ry, education.education.institution, Columbia University
m.02wnbyd, education.education.institution, Columbia University
m.02wnnpy, education.education.institution, Columbia University
m.062yny1, education.education.institution, Columbia University
m.03p722y, education.education.institution, Columbia University
Herbert Hutner, people.person.education, m.0_kwnl2
Ernest Nagel, people.person.education, m.02wmvdb
m.02wnczh, education.education.institution, Columbia University
m.05yzdgd, education.education.institution, Columbia University
m.0n0vd4w, education.education.institution, Columbia University
m.02wnjkj, education.education.institution, Columbia University
m.02wnsd8, education.education.institution, Columbia University
m.09vjksb, education.education.institution, Columbia University
m.02wnywp, education.education.institution, Columbia University
m.012gkyhd, education.education.institution, Columbia University
m.0770kjk, education.education.institution, Columbia University
m.02wpxsk, education.education.institution, Columbia University
Energy development, base.schemastaging.context_name.pronunciation, m.013154yd
m.05yzhxm, education.education.institution, Columbia University
Barack Obama, event.public_speaker.speeches_or_presentations, m.0j31vdq
m.062yqlf, education.education.institution, Columbia University
m.02wpwnk, education.education.institution, Columbia University
Energy development, business.industry.child_industry, Hydrogen economy
m.0j31vdq, event.public_speaker.speeches_or_presentations, Barack Obama
m.02wpfmz, education.education.institution, Columbia University
Energy industry, business.industry.child_industry, g.122dlgkc
Energy development, business.industry.child_industry, Harvesting lightning energy
m.02kq1sz, education.education.institution, Columbia University
m.02wncd9, education.education.institution, Columbia University
m.02wnfzh, education.education.institution, Columbia University
m.06wgjkk, education.education.institution, Columbia University
m.04lnwqh, education.education.institution, Columbia University
m.062yxky, education.education.institution, Columbia University
m.03p72yz, education.education.institution, Columbia University
m.09vmtgq, education.education.institution, Columbia University
m.02wpncd, education.education.institution, Columbia University
m.05t6nkz, education.education.institution, Columbia University
m.02wnnnm, education.education.institution, Columbia University
m.03p72fk, education.education.institution, Columbia University
m.04hllds, education.education.institution, Columbia University
Energy development, base.descriptive_names.names.descriptive_name, m.010lbgbm
m.04lnlbh, education.education.institution, Columbia University
m.03p72qy, education.education.institution, Columbia University
m.02wnnlr, education.education.institution, Columbia University
m.03p72ky, education.education.institution, Columbia University
m.0nbyj44, education.education.institution, State Elementary School Menteng 01
John Ashbery, people.person.education, m.02wp408
m.02wncdp, education.education.institution, Columbia University
m.02wnhd9, education.education.institution, Columbia University
m.0hzhjkd, education.education.institution, Columbia University
m.02wpy56, education.education.institution, Columbia University
Barack Obama, education.education.student, m.02nqgn2
m.02wpt7d, education.education.institution, Columbia University
Barack Obama, people.person.education, m.02nqgmw
m.02wmvd_, education.education.institution, Columbia University
m.04yw1yk, education.education.institution, Columbia University
Albert Hofstadter, people.person.education, m.010ccdcy
m.0667vky, education.education.institution, Columbia University
m.02wmvd1, education.education.institution, Columbia University
m.0770qyh, education.education.institution, Columbia University
m.02wp9yg, education.education.institution, Columbia University
2012 State of the Union Address, event.public_speaking_event.speech_presentation_discussion, m.0j31vdq
m.02wpnr6, education.education.institution, Columbia University
Barack Obama, education.education.student, m.02nqgp6
m.02wph8y, education.education.institution, Columbia University
Occidental College, location.location.containedby, Los Angeles
m.02sjh53, education.education.institution, Columbia University
m.02wnmrg, education.education.institution, Columbia University
m.02wnsg7, education.education.institution, Columbia University
m.09hzn8d, education.education.institution, Columbia University
m.02wnw4z, education.education.institution, Columbia University
m.02wnk43, education.education.institution, Columbia University
m.05nvdrk, education.education.institution, Columbia University
m.02wnndk, education.education.institution, Columbia University
m.02wnqy9, education.education.institution, Columbia University
m.02wn4zn, education.education.institution, Columbia University
m.02wpm21, education.education.institution, Columbia University
m.02wmqjd, education.education.institution, Columbia University
Alternative energy, business.industry.companies, Energy Conversion Devices
m.02wpfqh, education.education.institution, Columbia University
m.02wpfq0, education.education.institution, Columbia University
m.01012yys, education.education.institution, Columbia University
m.04hghns, education.education.institution, Columbia University
m.062yyft, education.education.institution, Columbia University
Energy development, common.topic.notable_for, g.125734_1_
Energy development, business.industry.companies, Lviv Insulator Company
m.04m57mb, education.education.institution, Columbia University
m.05yyy24, education.education.institution, Columbia University
m.02wnsfz, education.education.institution, Columbia University
Space-based solar power, business.industry.parent_industry, Energy development
m.09vjjkz, education.education.institution, Columbia University
m.02nqgn2, education.education.institution, Harvard Law School
m.02wpkrl, education.education.institution, Columbia University
m.02wpmmh, education.education.institution, Columbia University
m.04q1bzm, education.education.institution, Columbia University
m.04mbkkd, education.education.institution, Columbia University
m.02wmt4d, education.education.institution, Columbia University
m.04lnlzb, education.education.institution, Columbia University
Stephen J. Solarz, people.person.education, m.02wns24
m.02wprfy, education.education.institution, Columbia University
David Eisenbach, people.person.education, m.02wpnkh
m.03p72yh, education.education.institution, Columbia University
Education reform, event.speech_topic.speeches_or_presentations_on_this_topic, m.0j31vdq
Solar energy, business.industry.companies, Enfinity America
m.03p71yy, education.education.institution, Columbia University
m.02wprdq, education.education.institution, Columbia University
Barack Obama, education.education.student, m.0nbyhy_
m.02wnwk4, education.education.institution, Columbia University
m.07sk6nl, education.education.institution, Columbia University
Energy industry, common.topic.notable_types, Industry
m.02wmt4z, education.education.institution, Columbia University
m.0101hyzg, education.education.institution, Columbia University
m.02wnktd, education.education.institution, Columbia University
Leon Sullivan, people.person.education, m.0n1l1vd
m.02wnfkm, education.education.institution, Columbia University
m.07y4grx, education.education.institution, Columbia University
Energy development, base.descriptive_names.names.descriptive_name, m.010lbgn2
m.02whhyd, education.education.institution, Columbia University
m.02wnsnt, education.education.institution, Columbia University
m.06wgnkd, education.education.institution, Columbia University
m.02wppsp, education.education.institution, Columbia University
m.02wmzhp, education.education.institution, Columbia University
m.02wndtj, education.education.institution, Columbia University
m.05yyqdc, education.education.institution, Columbia University
m.02wpclt, education.education.institution, Columbia University
m.07skjzz, education.education.institution, Columbia University
m.02wmqzk, education.education.institution, Columbia University
m.02wns24, education.education.institution, Columbia University
Renewable energy industry, business.industry.companies, Catch the Wind
m.04m21zw, education.education.institution, Columbia University
m.04hldfh, education.education.institution, Columbia University
m.012n2tzq, education.education.institution, Columbia University
m.04lp8bz, education.education.institution, Columbia University
m.02wnkym, education.education.institution, Columbia University
m.02wnhn5, education.education.institution, Columbia University
m.02wpktr, education.education.institution, Columbia University
m.04lnm1y, education.education.institution, Columbia University
m.09scc2y, education.education.institution, Columbia University
m.05yzvwn, education.education.institution, Columbia University
Energy development, base.descriptive_names.names.descriptive_name, m.010lbf5k
m.02wmylf, education.education.institution, Columbia University
m.07ltmvz, education.education.institution, Columbia University
m.07y4gwt, education.education.institution, Columbia University
m.04md9lt, education.education.institution, Columbia University
m.062yxyg, education.education.institution, Columbia University
m.04hrmt5, education.education.institution, Columbia University
m.04hldyr, education.education.institution, Columbia University
m.0n1j0vd, education.education.institution, Columbia University
Energy development, base.descriptive_names.names.descriptive_name, m.010lbfff
Nuclear power debate, business.industry.parent_industry, Energy development
m.02wp4dn, education.education.institution, Columbia University
m.0nbyhy_, education.education.institution, St. Francis of Assisi Catholic School
Paul S. Appelbaum, people.person.education, m.04hgkq7
m.02wnxfk, education.education.institution, Columbia University
m.02wpjth, education.education.institution, Columbia University
m.0666hnb, education.education.institution, Columbia University
Energy development, base.descriptive_names.names.descriptive_name, m.010lbgq2
m.02wpm54, education.education.institution, Columbia University
Energy development, common.topic.notable_types, Industry
m.02wpfkb, education.education.institution, Columbia University
Alternative energy, business.industry.companies, Ormat Industries
m.02wnqrw, education.education.institution, Columbia University
m.05yyxdy, education.education.institution, Columbia University
Occidental College, location.location.containedby, California
m.04yxrws, education.education.institution, Columbia University
Alternative energy, business.industry.companies, Apollo Energy Systems
m.02wnylh, education.education.institution, Columbia University
m.09vjktd, education.education.institution, Columbia University
m.02wnffw, education.education.institution, Columbia University
m.02wmtk4, education.education.institution, Columbia University
m.07ltd5y, education.education.institution, Columbia University
m.02wmt49, education.education.institution, Columbia University
m.02wpf49, education.education.institution, Columbia University
m.04hqylt, education.education.institution, Columbia University
m.02wnshy, education.education.institution, Columbia University
Energy development, base.descriptive_names.names.descriptive_name, m.010lbf4j
m.02wmtrj, education.education.institution, Columbia University
Solar thermal energy, business.industry.parent_industry, Energy development
m.0j31vdq, event.speech_or_presentation.speech_topic, Energy development
Solar energy, business.industry.parent_industry, Energy development
Energy development, business.industry.child_industry, Wind power
m.0667hfk, education.education.institution, Columbia University
m.02wnp4y, education.education.institution, Columbia University
m.02wnsrm, education.education.institution, Columbia University
m.02wp6yg, education.education.institution, Columbia University
m.02wmyd4, education.education.institution, Columbia University
m.02wn9lz, education.education.institution, Columbia University
ENEL S.p.A., business.business_operation.industry, Energy industry
m.02wmt0c, education.education.institution, Columbia University
m.02wnzdn, education.education.institution, Columbia University
m.04ystr2, education.education.institution, Columbia University
m.04lndc4, education.education.institution, Columbia University
m.02wmwnk, education.education.institution, Columbia University
m.02wmz66, education.education.institution, Columbia University
Alternative energy, business.industry.parent_industry, Energy development
m.02wpgdq, education.education.institution, Columbia University
m.02wpf4p, education.education.institution, Columbia University
m.04hgrtj, education.education.institution, Columbia University
m.07sk4y9, education.education.institution, Columbia University
m.02wmshz, education.education.institution, Columbia University
m.02wpfkx, education.education.institution, Columbia University

Answer: Harvard Law School
Columbia University
Noelani Elementary School
State Elementary School Menteng 01
Punahou School
Occidental College
St. Francis of Assisi Catholic School