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 zip codes are used in the governmental jurisdiction where the government includes the position entitled Mayor of Clarksville, TN? 
Knowledge Triplets: Clarksville, location.citytown.postal_codes, 37042
m.0101gxct, freebase.valuenotation.has_no_value, To
m.0101gxct, government.government_position_held.office_position_or_title, Mayor of Clarksville
m.0hvsqjl, location.mailing_address.postal_code, 37042
m.03n_9cj, location.mailing_address.postal_code, 37040
Government Office or Title, type.type.expected_by, Office, Position, or Title
m.08njxsv, location.mailing_address.postal_code, 37040
Mayor of Clarksville, government.government_office_or_title.office_holders, m.0101gxct
m.02nl7q3, dataworld.gardening_hint.replaced_by, 37040
m.0101gxct, government.government_position_held.jurisdiction_of_office, Clarksville
Clarksville, location.citytown.postal_codes, 37040
37041, location.postal_code.postal_code, 37041
Dunbar Cave State Park, location.location.containedby, 37043
m.0hvr9zy, location.mailing_address.postal_code, 37042
Government Office or Title, common.topic.article, m.02xlj1v
Governors Stadium, location.location.containedby, 37040
Mayor of Clarksville, common.topic.notable_for, g.1q3sjk9fs
37043, location.location.containedby, Montgomery County
37040, location.location.containedby, Montgomery County
37043, location.location.geolocation, m.03dxjr_
Government Office or Title, type.type.expected_by, Title of Chief Executive
Government Office or Title, type.type.expected_by, Office, position, or title
m.0101gxct, government.government_position_held.office_holder, Kim McMillan
37043, location.postal_code.country, United States of America
m.03n_h84, location.mailing_address.postal_code, 37043
m.0j9y8p3, location.mailing_address.postal_code, 37040
Montgomery County, location.location.contains, 37043
Government Office or Title, type.type.expected_by, Offices
m.0dhvpt3, location.mailing_address.postal_code, 37043
Clarksville, location.citytown.postal_codes, 37044
m.08njxwh, location.mailing_address.postal_code, 37042
Clarksville–Montgomery County Regional Airport, location.location.containedby, 37042
37040, location.location.geolocation, m.03dxjrb
Government Office or Title, type.type.properties, Category
m.0cnnml_, location.mailing_address.postal_code, 37042
Mayor, common.topic.notable_types, Government Office or Title
37042, location.location.containedby, Montgomery County
Clarksville, government.governmental_jurisdiction.governing_officials, m.0101gxct
Montgomery County, location.location.contains, 37040
Office, position, or title, type.property.expected_type, Government Office or Title
m.0jx72xb, location.mailing_address.postal_code, 37040
Montgomery County, location.location.contains, 37042
m.0dj16vg, location.mailing_address.postal_code, 37040
m.0cnph73, location.mailing_address.postal_code, 37040
m.0dj16v0, location.mailing_address.postal_code, 37042
m.0dhq11b, location.mailing_address.postal_code, 37042
Office, position, or title, rdf-schema#range, Government Office or Title
37042, location.postal_code.country, United States of America
37042, location.location.contains, Clarksville–Montgomery County Regional Airport
Mayor of Clarksville, government.government_office_or_title.office_holders, m.0101gxct
37044, location.postal_code.country, United States of America
37043, location.postal_code.postal_code, 37043
Clarksville, location.citytown.postal_codes, 37041
m.0dhvptk, location.mailing_address.postal_code, 37040
m.0101gxct, government.government_position_held.basic_title, Mayor
m.0cnn74m, location.mailing_address.postal_code, 37044
Government Office or Title, type.type.properties, Office Holders
m.0gw5kkp, location.mailing_address.postal_code, 37043
Dunn Center, location.location.containedby, 37040
Topic, freebase.type_profile.published, Published
Government Office or Title, freebase.type_profile.strict_included_types, Non-Agent
Clarksville, location.citytown.postal_codes, 37044
Mayor of Clarksville, common.topic.notable_types, Government Office or Title
m.0dhl9d_, location.mailing_address.postal_code, 37043
m.08njxx8, location.mailing_address.postal_code, 37042
m.03n_jg3, location.mailing_address.postal_code, 37042
Government Office or Title, freebase.type_profile.published, Published
Government Office or Title, freebase.type_profile.strict_included_types, Topic
m.08njl7n, location.mailing_address.postal_code, 37043
37042, location.postal_code.postal_code, 37042
Clarksville, location.citytown.postal_codes, 37043
Clarksville, location.hud_county_place.place, Clarksville
Office, position, or title, owl#inverseOf, Office Holders
Clarksville, location.citytown.postal_codes, 37040
Government Office or Title, type.type.expected_by, Office
m.0dhl9dk, location.mailing_address.postal_code, 37042
37040, location.postal_code.country, United States of America
37040, location.location.contains, Dunn Center
Government Office or Title, type.type.properties, Governmental body (if any)
Government Office or Title, freebase.type_profile.kind, Definition
Government Office or Title, type.type.expected_by, Offices/Positions Within the Body
Government Office or Title, freebase.type_profile.strict_included_types, Abstract
Office, position, or title, type.property.reverse_property, Office Holders
37041, location.postal_code.country, United States of America
m.0101gxct, government.government_position_held.jurisdiction_of_office, Clarksville
m.0dhfkdd, location.mailing_address.postal_code, 37043
m.0dhxf9l, location.mailing_address.postal_code, 37040
Government Office or Title, type.type.expected_by, Government positions
m.012smqsr, location.mailing_address.postal_code, 37040
m.0dhw14y, location.mailing_address.postal_code, 37040
37042, location.location.geolocation, m.03dxjrl
Kim McMillan, government.politician.government_positions_held, m.0101gxct
m.0dj0y81, location.mailing_address.postal_code, 37042
37040, location.location.contains, Governors Stadium
m.0dh_9jw, location.mailing_address.postal_code, 37040
Clarksville, location.citytown.postal_codes, 37041
m.0b6y34c, location.mailing_address.postal_code, 37042
Clarksville, location.citytown.postal_codes, 37042
37044, location.postal_code.postal_code, 37044
m.0dhxf94, location.mailing_address.postal_code, 37040
m.0cnn5x3, location.mailing_address.postal_code, 37042
Government Office or Title, freebase.type_hints.included_types, Topic
Government Office or Title, type.type.domain, Government
Government Office or Title, type.type.properties, Jurisdiction
37040, location.postal_code.postal_code, 37040
Clarksville, location.citytown.postal_codes, 37043
m.09s5dng, location.mailing_address.postal_code, 37040
37043, location.location.contains, Dunbar Cave State Park

Answer: 37040
37042
37043
37044
37041