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 currency is used in the country with national anthem As-Salem al-Amiri? 
Knowledge Triplets: As-Salam al-Amiri, common.topic.notable_types, National Anthem
National anthem, freebase.equivalent_topic.equivalent_type, National Anthem
National Anthem, common.topic.article, m.03nbgmy
National Anthem, freebase.type_profile.kind, Definition
qatari riyal.noun.01, base.wordnet.synset.equivalent_topic, Qatari riyal
As-Salam al-Amiri, common.topic.notable_for, g.12558qwkj
m.0r1_40t, dataworld.gardening_hint.last_referenced_by, Qatari riyal
National Anthem, freebase.type_hints.included_types, Topic
National Anthem, freebase.type_profile.strict_included_types, Topic
Composition, freebase.type_hints.included_types, Topic
As-Salam al-Amiri, government.national_anthem.national_anthem_of, m.0h_1gh3
National Anthem, freebase.type_profile.equivalent_topic, National anthem
m.0h_1gh3, location.country.national_anthem, Qatar
Qatari riyal, finance.currency.prefix_symbol, QR
Composition, freebase.type_profile.published, Published
Anthem, type.property.master_property, National anthem of
Qatari riyal, finance.currency.currency_code, QAR
Composition, freebase.type_profile.kind, Definition
m.0h_1gh3, government.national_anthem_of_a_country.anthem, As-Salam al-Amiri
As-Salam al-Amiri, government.national_anthem_of_a_country.anthem, m.0h_1gh3
Anthem, type.property.expected_type, National Anthem
Qatar, location.country.currency_used, Qatari riyal
National Anthem, type.type.properties, National anthem of
As-Salam al-Amiri, common.topic.article, m.02pdls
National Anthem, type.type.expected_by, Anthem
National Anthem, type.type.domain, Government
As-Salam al-Amiri, base.schemastaging.context_name.pronunciation, g.125_p42by
National Anthem, freebase.type_hints.included_types, Composition
m.0h_1gh3, government.national_anthem_of_a_country.country, Qatar
Anthem, rdf-schema#range, National Anthem
National Anthem, freebase.type_profile.published, Published
Composition, freebase.type_profile.strict_included_types, Topic
Qatar, finance.currency.countries_used, Qatari riyal
Qatar, location.country.national_anthem, m.0h_1gh3
m.0jm6ksk, measurement_unit.dated_money_value.currency, Qatari riyal
National Anthem, freebase.type_profile.strict_included_types, Composition
Qatari riyal, finance.currency.countries_used, Qatar
Topic, freebase.type_profile.published, Published

Answer: Qatari riyal