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: Which country includes the President of the European Council and is a member of the Organization? 
Knowledge Triplets: Herman Van Rompuy portrait, common.image.appears_in_topic_gallery, Herman Van Rompuy
Leadership Role, freebase.type_hints.included_types, Topic
Jan Fischer, common.topic.image, Jan Fischer (Czech politician)
m.0blmbtg, common.resource.annotations, m.0b6vtfw
Leadership Role, type.type.expected_by, Role
Leadership Role, common.topic.article, m.0d9vlf4
Role, rdf-schema#range, Leadership Role
m.0w1g9q9, freebase.valuenotation.has_no_value, To
m.0b6vtfw, common.webpage.topic, President of the European Council
Fredrik-Reinfeldt, common.image.appears_in_topic_gallery, President of the European Council
Herman Van Rompuy portrait, common.image.appears_in_topic_gallery, President of the European Council
Fredrik-Reinfeldt, common.image.size, m.02b69zn
European Union, organization.organization.leadership, m.0w1g9q9
President of the European Council, common.topic.image, Jan Fischer (Czech politician)
Role, type.property.reverse_property, Leaders
Herman Van Rompuy, business.board_member.leader_of, m.0w1g9q9
Jan Fischer (Czech politician), common.image.appears_in_topic_gallery, Jan Fischer
Leadership Role, type.type.properties, Governors
m.09vlhnw, common.webpage.resource, m.0bjrvd5
Fredrik-Reinfeldt, common.image.appears_in_topic_gallery, Prime Minister of Sweden
m.0b6vtfw, common.webpage.resource, m.0blmbtg
President of the European Council, common.topic.webpage, m.09vlhnw
Role, type.property.expected_type, Leadership Role
m.0bjrvd5, common.resource.annotations, m.09vlhnw
Role, type.property.reverse_property, Governors
Leadership Role, type.type.properties, Leaders
Role, owl#inverseOf, Governors
Leadership Role, type.type.domain, Organization
m.0w1g9q9, organization.leadership.organization, European Union
Herman Van Rompuy, common.topic.image, Herman Van Rompuy portrait
Jan Fischer (Czech politician), common.image.appears_in_topic_gallery, President of the European Council
Prime Minister of Sweden, common.topic.image, Fredrik-Reinfeldt
Herman Van Rompuy portrait, common.image.size, m.03st9sk
m.09vlhnw, common.webpage.topic, President of the European Council
President of the European Council, base.schemastaging.context_name.pronunciation, g.125_rjf_g
Role, owl#inverseOf, Leaders
Leadership Role, freebase.type_profile.strict_included_types, Topic
Jan Fischer (Czech politician), common.image.size, m.05tyg76
President of the European Council, common.topic.article, m.02vk5s5
President of the European Council, common.topic.image, Fredrik-Reinfeldt
President of the European Council, common.topic.image, Herman Van Rompuy portrait
President of the European Council, common.topic.notable_types, Leadership Role
m.0w1g9q9, organization.leadership.person, Herman Van Rompuy
President of the European Council, common.topic.notable_for, g.1yl5n3nzq
m.0w1g9q9, organization.leadership.role, President of the European Council
President of the European Council, common.topic.webpage, m.0b6vtfw
President of the European Council, organization.role.leaders, m.0w1g9q9

Answer: 1957-03-25
1973-01-01
1981-01-01
1986-01-01
1995-01-01
2004-05-01
2007-01-01
2013-07-01