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 close to Sandals Grande in the country with national anthem Sons and daughters of St. Lucia? 
Knowledge Triplets: Anthem, rdf-schema#range, National Anthem
George F. L. Charles Airport, aviation.airport.iata, SLU
National anthem, freebase.equivalent_topic.equivalent_type, National Anthem
George F. L. Charles Airport, location.location.containedby, Saint Lucia
National Anthem, common.topic.article, m.03nbgmy
George F. L. Charles Airport, base.ourairports.airport.ourairports_id, TLPC
National Anthem, freebase.type_profile.kind, Definition
George F. L. Charles Airport, location.location.geolocation, m.02_ngm1
Sons and Daughters of Saint Lucia, common.topic.notable_for, g.12582fz2b
George F. L. Charles Airport, aviation.airport.icao, TLPC
National Anthem, freebase.type_hints.included_types, Composition
Composition, freebase.type_profile.strict_included_types, Topic
m.0h_3ck9, government.national_anthem_of_a_country.anthem, Sons and Daughters of Saint Lucia
Anthem, type.property.expected_type, National Anthem
George Charles, symbols.name_source.namesakes, George F. L. Charles Airport
m.0h_3ck9, government.national_anthem_of_a_country.country, Saint Lucia
Saint Lucia, location.country.national_anthem, m.0h_3ck9
m.0h_3ck9, location.country.national_anthem, Saint Lucia
George F. L. Charles Airport, symbols.namesake.named_after, George Charles
Sons and Daughters of Saint Lucia, government.national_anthem.national_anthem_of, m.0h_3ck9
Anthem, type.property.master_property, National anthem of
Composition, freebase.type_profile.published, Published
National Anthem, freebase.type_hints.included_types, Topic
National Anthem, freebase.type_profile.equivalent_topic, National anthem
Composition, freebase.type_hints.included_types, Topic
Saint Lucia, location.location.contains, George F. L. Charles Airport
Sons and Daughters of Saint Lucia, government.national_anthem.national_anthem_of, m.0h_3ck9
National Anthem, freebase.type_profile.published, Published
National Anthem, type.type.expected_by, Anthem
Topic, freebase.type_profile.published, Published
Saint Lucia, location.location.nearby_airports, George F. L. Charles Airport
Composition, freebase.type_profile.kind, Definition
George F. L. Charles Airport, aviation.airport.serves, Saint Lucia
National Anthem, type.type.domain, Government
Sons and Daughters of Saint Lucia, common.topic.notable_types, National Anthem
National Anthem, type.type.properties, National anthem of
Saint Lucia, location.location.nearby_airports, George F. L. Charles Airport
National Anthem, freebase.type_profile.strict_included_types, Composition
Sons and Daughters of Saint Lucia, common.topic.article, m.02gzd3
National Anthem, freebase.type_profile.strict_included_types, Topic

Answer: George F. L. Charles Airport