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 airport is closest to the town that is led by the mayor of Ithaca? 
Knowledge Triplets: m.0101n4g0, freebase.valuenotation.is_reviewed, Officeholder
Government Office or Title, type.type.domain, Government
Government Office or Title, freebase.type_profile.strict_included_types, Abstract
Ithaca, location.location.contains, Ithaca Tompkins Regional Airport
Government Office or Title, type.type.expected_by, Office, position, or title
Government Office or Title, freebase.type_profile.strict_included_types, Topic
Mayor, common.topic.notable_types, Government Office or Title
Government Office or Title, type.type.properties, Governmental body (if any)
Government Office or Title, freebase.type_profile.kind, Definition
14850, location.location.contains, Ithaca Tompkins Regional Airport
Government Office or Title, freebase.type_profile.strict_included_types, Non-Agent
Government Office or Title, type.type.expected_by, Offices/Positions Within the Body
Svante Myrick, government.politician.government_positions_held, m.0101n4g0
m.0101n4g0, freebase.valuenotation.is_reviewed, Jurisdiction of office
Ithaca, location.location.containedby, Ithaca Tompkins Regional Airport
Government Office or Title, common.topic.article, m.02xlj1v
Government Office or Title, type.type.expected_by, Offices
Ithaca Tompkins Regional Airport, aviation.airport.hub_for, Mohawk Airlines
Office, position, or title, rdf-schema#range, Government Office or Title
Ithaca Tompkins Regional Airport, aviation.airport.iata, ITH
Office, position, or title, owl#inverseOf, Office Holders
Mayor of Ithaca, common.topic.notable_types, Government Office or Title
Ithaca Tompkins Regional Airport, aviation.airport.serves, Ithaca
m.0101n4g0, government.government_position_held.jurisdiction_of_office, Ithaca
Office, position, or title, type.property.expected_type, Government Office or Title
Ithaca, location.location.nearby_airports, Ithaca Tompkins Regional Airport
Mohawk Airlines, aviation.airline.hubs, Ithaca Tompkins Regional Airport
Government Office or Title, type.type.properties, Jurisdiction
m.0101n4g0, freebase.valuenotation.is_reviewed, Basic title
Ithaca Tompkins Regional Airport, location.location.containedby, Ithaca
Mayor of Ithaca, government.government_office_or_title.office_holders, m.0101n4g0
Ithaca Tompkins Regional Airport, location.location.geolocation, m.02_k82g
Ithaca Tompkins Regional Airport, base.ourairports.airport.ourairports_id, KITH
Government Office or Title, type.type.expected_by, Office, Position, or Title
Ithaca, government.governmental_jurisdiction.governing_officials, m.0101n4g0
Tompkins County, location.location.contains, Ithaca Tompkins Regional Airport
Government Office or Title, type.type.expected_by, Title of Chief Executive
Office, position, or title, type.property.reverse_property, Office Holders
m.0101n4g0, freebase.valuenotation.has_no_value, To
m.0101n4g0, government.government_position_held.basic_title, Mayor
Ithaca, location.hud_county_place.place, Ithaca
m.0101n4g0, freebase.valuenotation.is_reviewed, Office, position, or title
Mayor of Ithaca, common.topic.notable_for, g.1q3sfkrnj
m.0101n4g0, freebase.valuenotation.is_reviewed, From
Topic, freebase.type_profile.published, Published
m.0101n4g0, government.government_position_held.jurisdiction_of_office, Ithaca
Government Office or Title, type.type.expected_by, Office
Government Office or Title, type.type.properties, Category
Ithaca Tompkins Regional Airport, location.location.containedby, Tompkins County
Mayor of Ithaca, government.government_office_or_title.office_holders, m.0101n4g0
Government Office or Title, type.type.properties, Office Holders
m.0101n4g0, government.government_position_held.office_holder, Svante Myrick
Government Office or Title, freebase.type_hints.included_types, Topic
m.0101n4g0, government.government_position_held.office_position_or_title, Mayor of Ithaca
Ithaca Tompkins Regional Airport, location.location.containedby, 14850
Government Office or Title, freebase.type_profile.published, Published
Government Office or Title, type.type.expected_by, Government positions

Answer: Ithaca Tompkins Regional Airport