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 year did the graduate form Poland Academy become the president? 
Knowledge Triplets: Organization, freebase.type_profile.strict_included_types, Agent
Educational Institution, type.type.expected_by, Educational institution
Educational Institution, type.type.expected_by, School
Educational Institution, type.type.properties, School magazines
Educational Institution, type.type.expected_by, Subsidiary Or Constituent Schools
Institution, type.property.expected_type, Educational Institution
Employer, freebase.type_profile.published, Published
School type, rdf-schema#domain, Educational Institution
School, type.property.master_property, Sports teams
m.04t5jdw, education.education.institution, Poland Academy
Educational Institution, freebase.type_profile.published, Published
Educational Institution, type.type.properties, Radio station
Educational Institution, type.type.properties, Students/Graduates
Mascot, type.property.reverse_property, School
Mascot, rdf-schema#domain, Educational Institution
Phone number, rdf-schema#domain, Educational Institution
Educational Institution, freebase.type_hints.included_types, Employer
Institution, rdf-schema#range, Educational Institution
Educational Institution, type.type.expected_by, Sponsor
Educational Institution, type.type.expected_by, Institution
Employer, freebase.type_hints.included_types, Topic
Institution, type.property.reverse_property, Students/Graduates
Educational Institution, type.type.properties, Number of faculty
Educational Institution, type.type.properties, Campuses
School, rdf-schema#range, Educational Institution
Mascot, type.property.schema, Educational Institution
Educational Institution, type.type.expected_by, Accademia Anja
Educational Institution, type.type.expected_by, Parent Institution
School type, type.property.reverse_property, Schools of this kind
Colors, rdf-schema#domain, Educational Institution
Educational Institution, type.type.domain, Education
Educational Institution, freebase.type_profile.strict_included_types, Topic
Educational Institution, type.type.expected_by, Member organisations
School/Institution, rdf-schema#range, Educational Institution
Institution, owl#inverseOf, Students/Graduates
Educational Institution, type.type.expected_by, Holding Institution
Educational Institution, type.type.properties, Nickname
Colors, type.property.schema, Educational Institution
Educational Institution, freebase.type_profile.strict_included_types, Abstract
Educational Institution, type.type.properties, Newspaper
Educational Institution, freebase.type_profile.kind, Description
Educational Institution, freebase.type_hints.included_types, Organization
Educational Institution, type.type.properties, Sexes admitted
Educational Institution, type.type.properties, Sports teams
Education, type.domain.types, Educational Institution
Topic, freebase.type_profile.published, Published
Educational Institution, freebase.type_profile.strict_included_types, Agent
Educational Institution, type.type.expected_by, Associated educational institution
Employer, freebase.type_profile.strict_included_types, Topic
Mascot, owl#inverseOf, School
Poland Academy, education.educational_institution.students_graduates, m.04t5jdw
Educational Institution, type.type.expected_by, School/Institution
Poland Academy, common.topic.notable_for, g.12590c2ts
Educational Institution, type.type.properties, Number of staff
Educational Institution, type.type.properties, Colors
Educational Institution, freebase.type_profile.strict_included_types, Employer
Organization, freebase.type_profile.published, Published
School type, type.property.schema, Educational Institution
School/Institution, type.property.expected_type, Educational Institution
Educational Institution, type.type.properties, School type
Poland Academy, common.topic.notable_types, Educational Institution
Organization, freebase.type_profile.strict_included_types, Topic
Educational Institution, type.type.properties, Phone number
Educational Institution, type.type.properties, Athletics brand
Educational Institution, common.topic.article, m.021y5nd
School, type.property.master_property, Mascot
Educational Institution, type.type.properties, Honorary degrees awarded
Educational Institution, type.type.properties, Subsidiary Or Constituent Schools
m.04t5jdw, education.education.student, William McKinley
Organization, freebase.type_profile.strict_included_types, Abstract
Institution, owl#inverseOf, Honorary degrees awarded
School, type.property.expected_type, Educational Institution
Phone number, type.property.schema, Educational Institution
Educational Institution, type.type.expected_by, Schools of this kind
Educational Institution, type.type.expected_by, Teaches at
Organization, freebase.type_hints.included_types, Topic
School type, owl#inverseOf, Schools of this kind
Educational Institution, type.type.properties, Parent Institution
Educational Institution, type.type.expected_by, Associated Institutions
Educational Institution, type.type.properties, Motto
Educational Institution, freebase.type_profile.strict_included_types, Organization
Educational Institution, type.type.properties, Mascot
William McKinley, people.person.education, m.04t5jdw
Educational Institution, freebase.type_hints.included_types, Topic
Institution, type.property.reverse_property, Honorary degrees awarded
Educational Institution, freebase.type_profile.strict_included_types, Inanimate
Organization, freebase.type_profile.strict_included_types, Inanimate
Educational Institution, type.type.properties, Total Enrollment
Employer, freebase.type_profile.strict_included_types, Agent
Educational Institution, freebase.documented_object.documentation, m.021y5nd

Answer: 1892-01-11
1897-03-04