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 ship builder is responsible for having built uss constitution? 
Knowledge Triplets: United States Constitution, law.constitution.amendments, Twentieth Amendment to the United States Constitution
Seventh Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
constitution.noun.05, base.wordnet.synset.equivalent_topic, USS Constitution
Nineteenth Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
Ninth Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
Edmund Hartt, boats.ship_builder.ships_built, USS Independence
USS Constitution, user.jamie.default_domain.boat.displacement_tons, 2200.0
William Doughty, boats.ship_designer.boats_designed, USS Frolic
William Doughty, boats.ship_designer.boats_designed, USS President
USS Constitution, user.patrick.default_domain.warship_v1_1.crew, m.02kljsr
USS Constitution, boats.ship_builder.ships_built, Edmund Hartt
Third Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
USS Boston, boats.ship.ship_builder, Edmund Hartt
USS Constitution, base.usnris.nris_listing.item_number, 66000789
Sixteenth Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
Boston, location.location.contains, USS Constitution
United States Constitution, law.constitution.amendments, Second Amendment to the United States Constitution
USS Constitution, boats.ship.beam, 13.3
USS Alligator, boats.ship.place_built, Boston Navy Yard
USS Constitution, user.patrick.default_domain.warship_v1_1.crew, m.02kljsc
USS Constitution, base.usnris.nris_listing.significant_year, 1812
First Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
United States Constitution, law.constitution.amendments, Seventh Amendment to the United States Constitution
Full-rigged ship, base.sails.sailboat.ships, Britannia
Fourth Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
USS Constitution, boats.ship.length_overall, 62.0
USS Constitution, user.avh.default_domain.ellerdale_topic.ellerdale_id, 0080-398d
Full-rigged ship, base.tallships.tall_ship_rig.ships_of_this_rig, USS Constitution
Twenty-second Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
William Doughty, boats.ship_designer.boats_designed, USS Wasp
m.09vj0kt, base.yupgrade.user.topics, USS Constitution
Edmund Hartt, boats.ship_builder.ships_built, USS Argus
USS Constitution, base.usnris.nris_listing.significance_level, National
USS Constitution, base.sails.sailing_ship.sailing_ship_type, Sailing Frigate
Twenty-fourth Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
Twenty-first Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
USS Frolic, boats.ship.designer, William Doughty
United States Constitution, law.constitution.in_force_from, 1789-03-04
USS Constitution, base.tallships.tall_ship.sail_area, 3968.0
United States Constitution, law.constitution.amendments, Twelfth Amendment to the United States Constitution
Twelfth Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
United States Constitution, law.constitution.amendments, Eleventh Amendment to the United States Constitution
Full-rigged ship, base.sails.sailboat.ships, Christian Radich
USS President, boats.ship.designer, William Doughty
USS Constitution, user.jamie.default_domain.boat.designer, Joshua Humphreys
Joshua Humphreys, boats.ship_designer.boats_designed, USS Constellation
United States Constitution, law.constitution.amendments, Twenty-seventh Amendment to the United States Constitution
United States Constitution, law.constitution.amendments, Twenty-first Amendment to the United States Constitution
United States Constitution, law.constitution.amendments, Twenty-fourth Amendment to the United States Constitution
m.02kljsc, user.patrick.default_domain.warship_crew_tenure.ship, USS Constitution
m.06h_8hr, base.yupgrade.user.topics, USS Constitution
USS Frolic, boats.ship.place_built, Charlestown, Boston
USS Constitution, base.aubreymaturin.ship.mentions, m.05ndb4q
United States Constitution, law.constitution.amendments, Twenty-fifth Amendment to the United States Constitution
USS Constitution, boats.ship.designer, Joshua Humphreys
USS Independence, boats.ship.ship_builder, Edmund Hartt
m.02kljsr, user.patrick.default_domain.warship_crew_tenure.ship, USS Constitution
USS Constitution, location.location.containedby, Massachusetts
Seventeenth Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
USS Independence, boats.ship.place_built, Boston Navy Yard
United States Constitution, law.constitution.amendments, Fifth Amendment to the United States Constitution
USS Constellation, boats.ship.designer, Joshua Humphreys
William Doughty, boats.ship_designer.boats_designed, USS United States
USS Cyane, boats.ship.place_built, Boston Navy Yard
Tenth Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
USS Constitution, boats.ship.place_built, Boston Navy Yard
USS Constitution, boats.ship.designer, William Doughty
United States Constitution, law.constitution.amendments, Fourteenth Amendment to the United States Constitution
USS Constitution, symbols.namesake.named_after, United States Constitution
USS Constitution, boats.ship.keel_laid, 1795
USS United States, boats.ship.designer, William Doughty
USS Constitution, boats.ship.length_at_waterline, 53.0
United States Constitution, law.constitution.constitutional_convention, The United States Constitutional Convention
Twenty-seventh Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
Joshua Humphreys, boats.ship_designer.boats_designed, USS United States
USS Bainbridge, boats.ship.place_built, Boston Navy Yard
Thirteenth Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
United States Constitution, law.constitution.amendments, Eighteenth Amendment to the United States Constitution
Sailing Frigate, base.sails.sailboat.ships, USS Constitution
Eleventh Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
USS Congress, boats.ship.designer, Joshua Humphreys
USS Marion, boats.ship.place_built, Boston Navy Yard
USS Peacock, boats.ship.designer, William Doughty
Ebb Tide, boats.ship.place_built, United States of America
United States Constitution, law.constitution.amendments, Twenty-sixth Amendment to the United States Constitution
USS Constitution, base.tallships.tall_ship.rig, Full-rigged ship
USS Constitution, user.jamie.default_domain.war_ship.nationality, United States of America
Twenty-sixth Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
Eighth Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
USS Constitution, boats.ship.hull_material, Wood
USS Constitution, user.skud.boats.warship.naval_engagements, m.05ndbzk
Fifteenth Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
United States Constitution, law.constitution.amendments, Fifteenth Amendment to the United States Constitution
United States Constitution, law.constitution.amendments, Third Amendment to the United States Constitution
USS Constitution, user.patrick.default_domain.warship_v1_1.crew, m.02kljnv
m.05ndbzk, user.skud.boats.naval_engagement_participation.ship, USS Constitution
USS Constitution, user.jamie.default_domain.boat.beam, 13.3
USS President, boats.ship.designer, Joshua Humphreys
m.09sq8_9, base.yupgrade.user.topics, USS Constitution
USS Constitution, location.location.geolocation, m.02_dk9k
USS Wasp, boats.ship.designer, William Doughty
United States Constitution, law.constitution.amendments, Fourth Amendment to the United States Constitution
USS Constitution, user.jamie.default_domain.boat.keel_laid, 1795
United States Constitution, symbols.name_source.namesakes, USS Constitution
America, boats.ship.place_built, United States of America
Second Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
United States Constitution, law.constitution.amendments, Eighth Amendment to the United States Constitution
USS Constitution, user.jamie.default_domain.sailboat.main_mast_height, 67.0
William Doughty, boats.ship_designer.boats_designed, USS Peacock
National, base.usnris.significance_level.listings, USS Constitution
Sailing Frigate, base.sails.sailboat.ships, USS Bourbon
Sixth Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
USS Constitution, user.jamie.default_domain.boat.draft, 4.4
Joshua Humphreys, boats.ship_designer.boats_designed, USS Constitution
Full-rigged ship, base.sails.sailboat.ships, Columbia Rediviva
USS Constitution, boats.ship.launched, 1797-10-10
USS Constitution, location.location.containedby, Boston
m.02kljnv, user.patrick.default_domain.warship_crew_tenure.ship, USS Constitution
Edmund Hartt, boats.ship_builder.ships_built, USS Boston
Twentieth Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
Joshua Humphreys, boats.ship_designer.boats_designed, USS President
m.0wr8rsn, dataworld.gardening_hint.last_referenced_by, USS Constitution
Twenty-fifth Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
USS Constitution, protected_sites.listed_site.designation_as_natural_or_cultural_site, m.05gt5kg
Sailing Frigate, base.sails.sailboat.ships, USS Boston
Sailing Frigate, base.sails.sailboat.ships, USS Queen of France
United States Constitution, law.constitution.amendments, Tenth Amendment to the United States Constitution
United States Constitution, law.constitution.amendments, First Amendment to the United States Constitution
USS Constitution, user.jamie.default_domain.boat.ship_builder, Edmund Hartt
United States Constitution, law.constitution.amendments, Nineteenth Amendment to the United States Constitution
USS Constitution, user.jamie.default_domain.boat.top_speed, 13.0
USS Constitution, boats.ship.owners, m.05kcw5j
Twenty-third Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
Alexander, boats.ship.place_built, United States of America
USS Chesapeake, boats.ship.designer, Joshua Humphreys
USS Constitution, user.jamie.default_domain.war_ship.warship_class, Three-masted Frigate
m.05ndb4q, base.aubreymaturin.ship_mention.ship, USS Constitution
United States Constitution, law.constitution.amendments, Sixth Amendment to the United States Constitution
Joshua Humphreys, boats.ship_designer.boats_designed, USS Congress
Sailing Frigate, base.sails.sailboat.ships, French frigate Hermione
Eighteenth Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
USS Constitution, user.patrick.default_domain.warship_v1_1.crew, m.02kljt3
United States Constitution, law.constitution.amendments, Twenty-third Amendment to the United States Constitution
m.02kljt3, user.patrick.default_domain.warship_crew_tenure.ship, USS Constitution
Full-rigged ship, base.sails.sailboat.ships, Italian training ship Amerigo Vespucci
USS Constitution, user.jamie.default_domain.boat.hull_configuration, Monohull
United States Constitution, law.constitution.amendments, Thirteenth Amendment to the United States Constitution
Fifth Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
United States Constitution, law.constitution.amendments, Twenty-second Amendment to the United States Constitution
USS Constitution, boats.ship.draught, 6.4
Full-rigged ship, base.sails.sailboat.ships, HMS Surprise
USS Constitution, user.patrick.default_domain.warship_v1_1.commissioned, 1797-10-21
m.05gt5kg, protected_sites.natural_or_cultural_site_listing.listed_site, USS Constitution
United States Constitution, law.constitution.amendments, Ninth Amendment to the United States Constitution
Massachusetts, location.location.contains, USS Constitution
Mayflower, boats.ship.place_built, Boston
Edmund Hartt, boats.ship_builder.ships_built, USS Constitution
USS Constitution, base.tallships.tall_ship.rig_height, 67.0
USS Constitution, base.usnris.nris_listing.significant_year, 1797
USS Constitution, boats.ship.ship_builder, Edmund Hartt
United States Constitution, law.constitution.country, United States of America
William Doughty, boats.ship_designer.boats_designed, USS Constitution
m.05kcw5j, boats.ship_ownership.owner, United States Navy
USS Argus, boats.ship.place_built, Boston Navy Yard
USS United States, boats.ship.designer, Joshua Humphreys
Puritan, boats.ship.place_built, Boston
USS Argus, boats.ship.ship_builder, Edmund Hartt
m.09vj0kh, base.yupgrade.user.topics, USS Constitution
Fourteenth Amendment to the United States Constitution, law.constitutional_amendment.constitution, United States Constitution
United States Navy, boats.ship_owner.ships_owned, m.05kcw5j
USS Hartford, boats.ship.place_built, Boston Navy Yard
United States Constitution, law.constitution.amendments, Sixteenth Amendment to the United States Constitution
USS Constitution, user.jamie.default_domain.boat.launched, 1797-10-10
m.09vj0jw, base.yupgrade.user.topics, USS Constitution
United States Constitution, law.constitution.amendments, Seventeenth Amendment to the United States Constitution
Joshua Humphreys, boats.ship_designer.boats_designed, USS Chesapeake
USS Constitution, base.tallships.tall_ship.home_port, Charlestown, Boston
m.05kcw5j, boats.ship_ownership.ship, USS Constitution
HMS Malta, boats.ship.place_built, United States of America

Answer: Edmund Hartt