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 are the sponsors of sigkdd? 
Knowledge Triplets: m.0ccc40y, organization.organization_relationship.child, ACM SIGKDD
m.0123jrzz, education.education.major_field_of_study, Data mining
Data mining, dataworld.gardening_hint.split_to, Machine learning
Data mining, education.field_of_study.subdiscipline_of, Computer Science
Tanagra, computer.software.software_genre, Data mining
Data mining, award.competition_type.competitions_of_this_type, KDD Cup 2010
Data mining, computer.software_genre.software_in_genre, SPSS Modeler
Data mining, book.book_subject.works, Selling taxonomy: a blind alley?
SPSS Modeler, computer.software.software_genre, Data mining
Data mining, dataworld.gardening_hint.split_to, Data mining
TANAGRA, computer.software.software_genre, Data mining
Computer Science, education.field_of_study.subdisciplines, Data mining
ACM SIGKDD, organization.organization.parent, m.0ccc40y
Rattle GUI, computer.software.software_genre, Data mining
m.07c_tq1, base.yupgrade.user.topics, Data mining
g.11b72wspxh, computer.software.software_genre, Data mining
Knowledge discovery, education.field_of_study.academic_departments, UNC Charlotte Department of Computer Science
Data mining, education.field_of_study.academic_departments, UNC Charlotte Department of Computer Science
m.0h7czkk, base.technologyofdoing.fieldconcern.field, Data mining
Data mining, computer.software_genre.software_in_genre, Teradata Warehouse Miner
Newsweek, base.yupgrade.user.topics, Data mining
Data mining, computer.software_genre.software_in_genre, Apache Giraph
Apache Giraph, computer.software.software_genre, Data mining
KDD-2010, time.event.locations, Washington, D.C.
ACM SIGKDD, book.periodical_publisher.periodicals_published, m.0b_qt06
m.07vyxvz, dataworld.gardening_hint.replaced_by, Data mining
UNC Charlotte Department of Computer Science, education.department.field, Knowledge discovery
Data mining, education.field_of_study.students_majoring, m.0123jrzz
Data mining, award.competition_type.competitions_of_this_type, Netflix Prize
KDD-2010, conferences.conference.series, ACM SIGKDD International Conference on Knowledge Discovery and Data Mining
Bayesian Type Inference and Visualization, base.x2009hackdayprojects.hack_day_project.keywords, Data mining
KDD Cup 2010, award.competition.type_of_competition, Data mining
Data mining, base.technologyofdoing.knowledge_worker_practice.applies_to, m.0h7c087
Intelligent Systems & Informatics (ISI) Group, user.uoa_it.uoa_it.uoa_research_group.research_topic, Data mining
Data mining, education.field_of_study.subdiscipline_of, Statistics
ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, conferences.conference_series.sponsoring_organization, ACM SIGKDD
KDD Cup 2009, award.competition.type_of_competition, Data mining
Data mining, organization.organization_sector.organizations_in_this_sector, ACM SIGKDD
Data mining, base.technologyofdoing.knowledge_worker_practice.applies_to, m.0h7c082
UNC Charlotte Department of Computer Science, education.department.field, Data mining
Microsoft Analysis Services, computer.software.software_genre, Data mining
m.07ng5gc, base.ontologies.ontology_instance_mapping.freebase_topic, Data mining
Data mining, business.industry.companies, Corouter Solutions Private Limited
KDD-2010, time.event.start_date, 2010-07-25
ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, conferences.conference_series.subject, Data mining
m.0h7d0p0, base.technologyofdoing.fieldconcern.field, Data mining
Decision stages, base.technologyofdoing.knowledge_worker_practice.related_to, Data mining
Data mining, computer.software_genre.software_in_genre, Microsoft Analysis Services
ACM SIGKDD, conferences.conference_sponsor.conferences, ACM SIGKDD International Conference on Knowledge Discovery and Data Mining
Data mining, computer.software_genre.software_in_genre, SPSS
m.0qr9x1s, dataworld.gardening_hint.last_referenced_by, Data mining
Data mining, computer.software_genre.software_in_genre, g.11b72wspxh
m.0sym61p, dataworld.gardening_hint.last_referenced_by, Knowledge discovery
Data mining, conferences.conference_subject.series_of_conferences_about_this, ACM SIGKDD International Conference on Knowledge Discovery and Data Mining
KDD Cup winner, award.award.presented_by, ACM SIGKDD
Statistics, education.field_of_study.subdisciplines, Data mining
ACM SIGKDD, organization.organization.sectors, Knowledge discovery
Corouter Solutions Private Limited, business.business_operation.industry, Data mining
Wired, base.yupgrade.user.topics, Data mining
m.0f99c4, dataworld.gardening_hint.replaced_by, ACM SIGKDD
ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, conferences.conference_series.conference, KDD-2010
Data mining, computer.software_genre.software_in_genre, Rattle GUI
Data mining, computer.software_genre.software_in_genre, AeroText
Data mining, base.ontologies.ontology_instance.equivalent_instances, m.07ng5gc
ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, conferences.conference_series.subject, Knowledge discovery
Orange, computer.software.software_genre, Data mining
Data mining, computer.software_genre.software_in_genre, Tanagra
ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, time.recurring_event.instances, KDD-2010
Knowledge discovery, conferences.conference_subject.series_of_conferences_about_this, ACM SIGKDD International Conference on Knowledge Discovery and Data Mining
ACM SIGKDD, award.award_presenting_organization.awards_presented, KDD Cup winner
Data mining, base.technologyofdoing.knowledge_worker_practice.included_in, Predictive analytics
Data mining, education.field_of_study.academics_in_this_field, Mark Hall
Data mining, user.avh.default_domain.ellerdale_topic.ellerdale_id, 009a-20db
SPSS, computer.software.software_genre, Data mining
Data mining, award.competition_type.competitions_of_this_type, KDD Cup 2009
Knowledge discovery, organization.organization_sector.organizations_in_this_sector, ACM SIGKDD
Predictive analytics, base.technologyofdoing.knowledge_worker_practice.includes, Data mining
Google Refine, computer.software.software_genre, Data mining
AeroText, computer.software.software_genre, Data mining
Data mining, computer.software_genre.software_in_genre, Orange
m.07vn74_, base.yupgrade.user.topics, Data mining
KDD-2010, time.event.instance_of_recurring_event, ACM SIGKDD International Conference on Knowledge Discovery and Data Mining
ACM SIGKDD, organization.organization.sectors, Data mining
m.0j_sq6b, education.education.specialization, Data mining
Selling taxonomy: a blind alley?, book.written_work.subjects, Data mining
Netflix Prize, award.competition.type_of_competition, Data mining
m.0zn_5h7, education.education.specialization, Data mining
Mark Hall, education.academic.research_areas, Data mining
Washington, D.C., location.location.events, KDD-2010
Data mining, computer.software_genre.software_in_genre, Weka
ELKI, computer.software.software_genre, Data mining
NASA, base.yupgrade.user.topics, Data mining
Data mining, base.technologyofdoing.knowledge_worker_practice.ptype, Technique
Teradata Warehouse Miner, computer.software.software_genre, Data mining
Data mining, base.technologyofdoing.knowledge_worker_practice.related_from, Decision stages
m.06wft1x, base.yupgrade.user.topics, Data mining
Data mining, user.uoa_it.uoa_it.uoa_research_topic.research_group, Intelligent Systems & Informatics (ISI) Group
Data mining, computer.software_genre.software_in_genre, ELKI
Data mining, computer.software_genre.software_in_genre, Google Refine
m.0sym62c, dataworld.gardening_hint.last_referenced_by, Knowledge discovery
Weka, computer.software.software_genre, Data mining
m.0b_qt06, book.periodical_publisher_period.publisher, ACM SIGKDD
Data mining, computer.software_genre.software_in_genre, TANAGRA

Answer: ACM SIGKDD