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 university did the public speaker who talked about Energy development attend? 
Knowledge Triplets: m.0_kwh4t, education.education.institution, Columbia University
Alternative energy, business.industry.parent_industry, Energy development
m.0jzrmsq, education.education.institution, Columbia University
m.02wptqh, education.education.institution, Columbia University
m.064zvqy, education.education.institution, Columbia University
Energy development, business.industry.child_industry, Space-based solar power
m.0fq7tnr, education.education.institution, Columbia University
m.03ltmny, education.education.institution, Columbia University
m.07sklh0, education.education.institution, Columbia University
m.05yyq_c, education.education.institution, Columbia University
m.02wp9zh, education.education.institution, Columbia University
m.02wndxb, education.education.institution, Columbia University
Energy development, business.industry.child_industry, Nuclear power debate
m.0hgtgcy, education.education.institution, Columbia University
m.02wmsqq, education.education.institution, Columbia University
m.0n0mnyy, education.education.institution, Columbia University
m.0znmjkd, education.education.institution, Columbia University
Energy development, business.industry.child_industry, Wind power
m.0_kwz17, education.education.institution, Columbia University
m.02wmqxp, education.education.institution, Columbia University
m.02wnfgq, education.education.institution, Columbia University
m.0770qyh, education.education.institution, Columbia University
m.0jzrjkf, education.education.institution, Columbia University
m.02wnnqh, education.education.institution, Columbia University
m.02wpvjy, education.education.institution, Columbia University
m.09vjjkz, education.education.institution, Columbia University
m.02wmzjb, education.education.institution, Columbia University
m.0n1mt7y, education.education.institution, Columbia University
m.05y_4q_, education.education.institution, Columbia University
m.0hgtfh9, education.education.institution, Columbia University
m.0n1mnr7, education.education.institution, Columbia University
m.0fq7nnd, education.education.institution, Columbia University
m.05yyqwj, education.education.institution, Columbia University
Energy development, base.descriptive_names.names.descriptive_name, m.010lbfff
m.02wnwm9, education.education.institution, Columbia University
m.04dxhyk, education.education.institution, Columbia University
m.0hgvzls, education.education.institution, Columbia University
m.02wmqp2, education.education.institution, Columbia University
m.06wgn2h, education.education.institution, Columbia University
m.0_kw7bn, education.education.institution, Columbia University
Energy development, base.schemastaging.context_name.pronunciation, m.013154yd
m.02wmrmy, education.education.institution, Columbia University
m.05yyy24, education.education.institution, Columbia University
Distributed generation, business.industry.parent_industry, Energy development
m.0svzrlh, education.education.institution, Columbia University
m.0hhy3wq, education.education.institution, Columbia University
m.0n0ylh8, education.education.institution, Columbia University
m.0gggktm, education.education.institution, Columbia University
m.05y_jx8, education.education.institution, Columbia University
Energy development, base.descriptive_names.names.descriptive_name, m.010lbgbm
m.012p0hmh, education.education.institution, Columbia University
m.0jzrld8, education.education.institution, Columbia University
m.02wpqfh, education.education.institution, Columbia University
m.05yy_j7, education.education.institution, Columbia University
m.012f3dn1, education.education.institution, Columbia University
Energy development, business.industry.child_industry, Distributed generation
m.07yh05p, education.education.institution, Columbia University
m.02wmqhr, education.education.institution, Columbia University
m.04hg09z, education.education.institution, Columbia University
m.0_9hgfy, education.education.institution, Columbia University
m.05yyj7m, education.education.institution, Columbia University
m.0jzrmxm, education.education.institution, Columbia University
m.0bmyzt8, education.education.institution, Columbia University
m.04hqch7, education.education.institution, Columbia University
m.04hqnxt, education.education.institution, Columbia University
Wind power, business.industry.parent_industry, Energy development
m.0bmygq9, education.education.institution, Columbia University
m.0zffgd4, education.education.institution, Columbia University
m.04q1fz0, education.education.institution, Columbia University
m.062yqtx, education.education.institution, Columbia University
m.02wpgy0, education.education.institution, Columbia University
m.03p72ky, education.education.institution, Columbia University
m.02wpfhk, education.education.institution, Columbia University
m.05yz8yw, education.education.institution, Columbia University
m.02wmz4m, education.education.institution, Columbia University
m.02wnm9h, education.education.institution, Columbia University
m.03p72mz, education.education.institution, Columbia University
m.0jzrjk8, education.education.institution, Columbia University
m.09vjd3y, education.education.institution, Columbia University
m.02wpfmz, education.education.institution, Columbia University
Barack Obama, people.person.education, m.02nqgpk
m.07sk4y9, education.education.institution, Columbia University
m.012gkyhd, education.education.institution, Columbia University
m.07yy5h3, education.education.institution, Columbia University
m.02wmqvq, education.education.institution, Columbia University
m.05yyy73, education.education.institution, Columbia University
Energy development, base.descriptive_names.names.descriptive_name, m.010lbgn2
Energy development, common.topic.image, Shell Refueller
m.02wpnkh, education.education.institution, Columbia University
m.02wmwnk, education.education.institution, Columbia University
m.04yw1yk, education.education.institution, Columbia University
m.02wpgdq, education.education.institution, Columbia University
HDI & Electricity per capita, common.image.appears_in_topic_gallery, Energy development
m.02wmyht, education.education.institution, Columbia University
m.04md9lt, education.education.institution, Columbia University
m.02wnhrn, education.education.institution, Columbia University
m.0n15zmh, education.education.institution, Columbia University
m.02wm_p8, education.education.institution, Columbia University
m.05yyy89, education.education.institution, Columbia University
m.0_kwh7n, education.education.institution, Columbia University
m.0_kwq1j, education.education.institution, Columbia University
m.04hgrtj, education.education.institution, Columbia University
m.0hgtdkq, education.education.institution, Columbia University
m.02wnhz9, education.education.institution, Columbia University
m.04q1dkk, education.education.institution, Columbia University
m.07y4gkp, education.education.institution, Columbia University
m.09vjdkg, education.education.institution, Columbia University
m.02wn8qy, education.education.institution, Columbia University
m.07ltd5y, education.education.institution, Columbia University
m.062yq2z, education.education.institution, Columbia University
m.09hzn8d, education.education.institution, Columbia University
m.04hgv4w, education.education.institution, Columbia University
m.02wn_lq, education.education.institution, Columbia University
m.0w5bdnr, education.education.institution, Columbia University
m.04hqylt, education.education.institution, Columbia University
m.02wp9mq, education.education.institution, Columbia University
m.02wpkht, education.education.institution, Columbia University
m.05yykqz, education.education.institution, Columbia University
m.0dw0qhy, education.education.institution, Columbia University
m.05yzqn8, education.education.institution, Columbia University
Energy development, event.speech_topic.speeches_or_presentations_on_this_topic, m.0j31vdq
m.04mbkkd, education.education.institution, Columbia University
m.04ysvqq, education.education.institution, Columbia University
m.04ynvhj, education.education.institution, Columbia University
m.03p72yh, education.education.institution, Columbia University
m.0dw0qzm, education.education.institution, Columbia University
m.07y4hg_, education.education.institution, Columbia University
Energy development, business.industry.child_industry, Harvesting lightning energy
m.04lnm1y, education.education.institution, Columbia University
Energy development, base.descriptive_names.names.descriptive_name, m.010lbgq2
m.0zcyd3q, education.education.institution, Columbia University
m.0n0klnq, education.education.institution, Columbia University
m.07ljj9b, education.education.institution, Columbia University
m.09vvzbc, education.education.institution, Columbia University
m.06wgnkd, education.education.institution, Columbia University
m.0bm_3yv, education.education.institution, Columbia University
m.05yywqd, education.education.institution, Columbia University
m.0cpldhq, education.education.institution, Columbia University
m.02wnsrm, education.education.institution, Columbia University
m.02wmr1y, education.education.institution, Columbia University
m.03p72yz, education.education.institution, Columbia University
m.04ysy0h, education.education.institution, Columbia University
m.07sk6nl, education.education.institution, Columbia University
m.07ltwvm, education.education.institution, Columbia University
m.0hn_9bc, education.education.institution, Columbia University
m.04q18zn, education.education.institution, Columbia University
Energy development, business.industry.child_industry, Solar thermal energy
m.07y4l3n, education.education.institution, Columbia University
Energy development, common.topic.image, Moss Landing Power Plant p1270026
m.02wnrxq, education.education.institution, Columbia University
m.0n0kygz, education.education.institution, Columbia University
m.02wpfqh, education.education.institution, Columbia University
m.02nqgn2, education.education.institution, Harvard Law School
m.09vmtgq, education.education.institution, Columbia University
m.04hqnd5, education.education.institution, Columbia University
m.04hg9v9, education.education.institution, Columbia University
m.02wnfqb, education.education.institution, Columbia University
m.0zcvkyq, education.education.institution, Columbia University
m.0n1kjkr, education.education.institution, Columbia University
m.01010qvz, education.education.institution, Columbia University
m.04hn4qr, education.education.institution, Columbia University
Energy development, common.topic.image, HDI & Electricity per capita
m.0zczyq6, education.education.institution, Columbia University
Nuclear power debate, business.industry.parent_industry, Energy development
m.0104tbnn, education.education.institution, Columbia University
Solar energy, business.industry.parent_industry, Energy development
m.0bmyhkw, education.education.institution, Columbia University
m.0_kwnl2, education.education.institution, Columbia University
m.02wncdz, education.education.institution, Columbia University
m.02wp2qy, education.education.institution, Columbia University
m.05yyzp8, education.education.institution, Columbia University
m.02_9f7v, education.education.institution, Columbia University
m.02wpcyh, education.education.institution, Columbia University
m.04hwbkq, education.education.institution, Columbia University
m.07y4fzh, education.education.institution, Columbia University
m.04hfzh2, education.education.institution, Columbia University
m.0fq7nph, education.education.institution, Columbia University
m.02wmqgj, education.education.institution, Columbia University
m.0j31vdq, event.public_speaker.speeches_or_presentations, Barack Obama
m.02wn4qh, education.education.institution, Columbia University
m.05yyzww, education.education.institution, Columbia University
m.02wmshz, education.education.institution, Columbia University
m.062yyh0, education.education.institution, Columbia University
Energy development, business.industry.companies, Lviv Insulator Company
m.0_kw3w9, education.education.institution, Columbia University
m.04mjy4c, education.education.institution, Columbia University
m.07y4lgw, education.education.institution, Columbia University
m.07ltrbf, education.education.institution, Columbia University
m.0n1md2y, education.education.institution, Columbia University
m.02wnqrw, education.education.institution, Columbia University
m.04hbdn_, education.education.institution, Columbia University
m.02wngkq, education.education.institution, Columbia University
m.02wpmmh, education.education.institution, Columbia University
m.0hhy0kt, education.education.institution, Columbia University
m.0w5hgz9, education.education.institution, Columbia University
m.05y_by5, education.education.institution, Columbia University
Energy development, base.descriptive_names.names.descriptive_name, m.010lbf4j
Hydrogen economy, business.industry.parent_industry, Energy development
m.02wmqnf, education.education.institution, Columbia University
m.02wnztd, education.education.institution, Columbia University
m.04lnybv, education.education.institution, Columbia University
m.05y_8vw, education.education.institution, Columbia University
m.04fntny, education.education.institution, Columbia University
Energy development, business.industry.child_industry, Solar energy
m.062yw1m, education.education.institution, Columbia University
Energy development, business.industry.child_industry, Hydrogen economy
m.0fq3y56, education.education.institution, Columbia University
m.02wpqth, education.education.institution, Columbia University
Shell Refueller, common.image.appears_in_topic_gallery, Energy development
m.0hnmwqj, education.education.institution, Columbia University
m.04lnh8w, education.education.institution, Columbia University
m.02nqgmw, education.education.institution, Columbia University
Energy development, business.industry.companies, Unirac
m.04hfhnt, education.education.institution, Columbia University
m.02wnyny, education.education.institution, Columbia University
m.0hhy0d8, education.education.institution, Columbia University
m.05y_5f8, education.education.institution, Columbia University
m.0k3fjky, education.education.institution, Columbia University
m.05yyv3q, education.education.institution, Columbia University
m.02wpfd5, education.education.institution, Columbia University
Barack Obama, people.person.education, m.02nqgmw
m.0n18zhl, education.education.institution, Columbia University
m.02wmyd4, education.education.institution, Columbia University
m.02wp8y9, education.education.institution, Columbia University
m.09vjgkd, education.education.institution, Columbia University
m.0bmyljq, education.education.institution, Columbia University
m.07lgd23, education.education.institution, Columbia University
m.0hn_j04, education.education.institution, Columbia University
m.02wnzfh, education.education.institution, Columbia University
m.04mjbm8, education.education.institution, Columbia University
m.05yyqq_, education.education.institution, Columbia University
m.06zzrmk, education.education.institution, Columbia University
m.0hgtdjn, education.education.institution, Columbia University
m.062yqsq, education.education.institution, Columbia University
m.02wpxrq, education.education.institution, Columbia University
m.07y4hvy, education.education.institution, Columbia University
m.0j31vdq, event.speech_or_presentation.speech_topic, Energy development
m.0dlqfh8, education.education.institution, Columbia University
m.09vjkxp, education.education.institution, Columbia University
m.05yzdgd, education.education.institution, Columbia University
m.0_kwq4n, education.education.institution, Columbia University
m.04hgk2q, education.education.institution, Columbia University
m.0_kw7qw, education.education.institution, Columbia University
m.05yyzl9, education.education.institution, Columbia University
m.07skgzf, education.education.institution, Columbia University
m.0hgtgmr, education.education.institution, Columbia University
Energy development, common.topic.notable_for, g.125734_1_
m.05yyqdc, education.education.institution, Columbia University
m.0wkm5yq, education.education.institution, Columbia University
m.02wpgyh, education.education.institution, Columbia University
m.07y4gwt, education.education.institution, Columbia University
m.04gckdw, education.education.institution, Columbia University
m.03p71yy, education.education.institution, Columbia University
m.0101bvtn, education.education.institution, Columbia University
m.04hqsn7, education.education.institution, Columbia University
m.02wpfrb, education.education.institution, Columbia University
m.02nqgmw, education.education.institution, Columbia University
m.04ystr2, education.education.institution, Columbia University
m.04mjgdn, education.education.institution, Columbia University
m.0hhyg56, education.education.institution, Columbia University
m.02wp8mr, education.education.institution, Columbia University
m.05yyq2g, education.education.institution, Columbia University
m.0_1xbnm, education.education.institution, Columbia University
m.0fq7yn8, education.education.institution, Columbia University
m.0hgtdrj, education.education.institution, Columbia University
m.0fq7ybb, education.education.institution, Columbia University
m.02wnmhd, education.education.institution, Columbia University
Energy development, base.descriptive_names.names.descriptive_name, m.010lbf5k
m.07y4grx, education.education.institution, Columbia University
m.05yzhxm, education.education.institution, Columbia University
m.02wprdq, education.education.institution, Columbia University
m.02_3svx, education.education.institution, Columbia University
m.04fntnq, education.education.institution, Columbia University
m.02wnkym, education.education.institution, Columbia University
m.0cpfzhg, education.education.institution, Columbia University
m.0hzhjkd, education.education.institution, Columbia University
m.0ybkkhm, education.education.institution, Columbia University
m.0_kwsrp, education.education.institution, Columbia University
m.07y4dmr, education.education.institution, Columbia University
m.02wmyy3, education.education.institution, Columbia University
m.04dnxdg, education.education.institution, Columbia University
m.05yy_hy, education.education.institution, Columbia University
m.02wnqy9, education.education.institution, Columbia University
m.02wnq8z, education.education.institution, Columbia University
m.07ylhcq, education.education.institution, Columbia University
m.04hghcq, education.education.institution, Columbia University
m.04hfd7k, education.education.institution, Columbia University
m.0hhy0bq, education.education.institution, Columbia University
m.0jzrklh, education.education.institution, Columbia University
m.02wmqzk, education.education.institution, Columbia University
m.02nqgpk, education.education.institution, Occidental College
m.012nz6vh, education.education.institution, Columbia University
m.02wmqjl, education.education.institution, Columbia University
Energy development, business.industry.child_industry, Alternative energy
m.05y_byh, education.education.institution, Columbia University
m.0zrjkbl, education.education.institution, Columbia University
m.04hql1q, education.education.institution, Columbia University
m.02wmwh6, education.education.institution, Columbia University
m.07y4fxb, education.education.institution, Columbia University
m.02wndjq, education.education.institution, Columbia University
m.02wns0y, education.education.institution, Columbia University
m.04lnrwj, education.education.institution, Columbia University
m.04hfqbj, education.education.institution, Columbia University
Energy development, business.industry.child_industry, Geothermal energy
m.0_kwd6w, education.education.institution, Columbia University
m.02wpfkb, education.education.institution, Columbia University
m.04hghns, education.education.institution, Columbia University
m.04m7kzw, education.education.institution, Columbia University
m.03p72mh, education.education.institution, Columbia University
m.02wmqjd, education.education.institution, Columbia University
m.04hwlvq, education.education.institution, Columbia University
m.0_kwbr9, education.education.institution, Columbia University
m.02wnnpy, education.education.institution, Columbia University
m.03gknvh, education.education.institution, Columbia University
Energy development, common.topic.notable_types, Industry
m.07y4fnd, education.education.institution, Columbia University
m.03p73dz, education.education.institution, Columbia University
m.03p73db, education.education.institution, Columbia University
m.02wnmps, education.education.institution, Columbia University
Barack Obama, people.person.education, m.02nqgn2
m.0_kwv9b, education.education.institution, Columbia University
m.07ltmvz, education.education.institution, Columbia University
m.02wpqyq, education.education.institution, Columbia University
m.0_kwgr3, education.education.institution, Columbia University
m.04kfqw7, education.education.institution, Columbia University
m.07skjzz, education.education.institution, Columbia University
m.05yyqs2, education.education.institution, Columbia University
m.02wmznn, education.education.institution, Columbia University
m.0n0kt1h, education.education.institution, Columbia University
Energy development, event.speech_topic.speeches_or_presentations_on_this_topic, m.0j31vdq
m.0hvxpqy, education.education.institution, Columbia University
m.05yyh6m, education.education.institution, Columbia University
m.0svxktq, education.education.institution, Columbia University
University of California, Berkeley, freebase.valuenotation.is_reviewed, Date founded
m.09vjhqd, education.education.institution, Columbia University
m.0101mwvz, education.education.institution, Columbia University
m.04q1dkb, education.education.institution, Columbia University
m.0_kw0v4, education.education.institution, Columbia University
m.0svzhy2, education.education.institution, Columbia University
m.0bmyjyq, education.education.institution, Columbia University
m.04zddk5, education.education.institution, Columbia University
m.04hfz2q, education.education.institution, Columbia University
m.04hkqt8, education.education.institution, Columbia University
m.04lpfwh, education.education.institution, Columbia University
m.09vjdwb, education.education.institution, Columbia University
m.0_kwzyg, education.education.institution, Columbia University
m.03p73dn, education.education.institution, Columbia University
m.012kzz2y, education.education.institution, Columbia University
Energy development, base.descriptive_names.names.descriptive_name, m.010lbg7q
m.04hg4zm, education.education.institution, Columbia University
m.04hgkws, education.education.institution, Columbia University
m.0bmywhz, education.education.institution, Columbia University
m.09vjlxz, education.education.institution, Columbia University
m.062yw9y, education.education.institution, Columbia University
m.05yz3dz, education.education.institution, Columbia University
m.02wpgy9, education.education.institution, Columbia University
m.05yy_mw, education.education.institution, Columbia University
m.02wmy4y, education.education.institution, Columbia University
m.010ldpxq, education.education.institution, Columbia University
m.07sk85d, education.education.institution, Columbia University
m.0mzmh14, education.education.institution, Columbia University
m.04lnwqh, education.education.institution, Columbia University
m.04lntgg, education.education.institution, Columbia University
m.03p72yb, education.education.institution, Columbia University
m.04hgkq7, education.education.institution, Columbia University
m.0_kwmww, education.education.institution, Columbia University
m.02wpqnm, education.education.institution, Columbia University
m.02wpqmw, education.education.institution, Columbia University
Barack Obama, event.public_speaker.speeches_or_presentations, m.0j31vdq
m.02wmvqn, education.education.institution, Columbia University
m.04q1bzm, education.education.institution, Columbia University
m.05yywjd, education.education.institution, Columbia University
m.02wp9yg, education.education.institution, Columbia University
m.02wpmhk, education.education.institution, Columbia University
m.02wmyh1, education.education.institution, Columbia University
m.0n18nmq, education.education.institution, Columbia University
m.05y_4m2, education.education.institution, Columbia University
Unirac, business.business_operation.industry, Energy development
m.02wpjkj, education.education.institution, Columbia University
m.05yzwbq, education.education.institution, Columbia University
m.02wmqjh, education.education.institution, Columbia University
Energy development, common.topic.article, m.02mg6q
m.03p72qy, education.education.institution, Columbia University
m.07y4glw, education.education.institution, Columbia University
m.02wpktr, education.education.institution, Columbia University
m.07y4fmh, education.education.institution, Columbia University
m.0fq7nst, education.education.institution, Columbia University
m.03p73dh, education.education.institution, Columbia University
m.0dw0kyq, education.education.institution, Columbia University
m.0hnjd21, education.education.institution, Columbia University
m.07zqq_8, education.education.institution, Columbia University
m.09vjktd, education.education.institution, Columbia University
m.0dlqdmh, education.education.institution, Columbia University
m.09vjkz_, education.education.institution, Columbia University
m.0101n1lq, education.education.institution, Columbia University
m.02wn9yb, education.education.institution, Columbia University
Energy development, base.descriptive_names.names.descriptive_name, m.010lbgnv
m.02wmzhp, education.education.institution, Columbia University
m.02wnbmy, education.education.institution, Columbia University
m.04hmf3h, education.education.institution, Columbia University
m.0cpl8yh, education.education.institution, Columbia University
m.02wmqyf, education.education.institution, Columbia University
m.04htnrg, education.education.institution, Columbia University
m.04m21zw, education.education.institution, Columbia University
m.02wnqwf, education.education.institution, Columbia University
m.02wmqnx, education.education.institution, Columbia University
m.02wpgmn, education.education.institution, Columbia University
m.062yvzs, education.education.institution, Columbia University
m.07yy3y5, education.education.institution, Columbia University
Geothermal energy, business.industry.parent_industry, Energy development

Answer: Harvard Law School
Columbia University
Occidental College