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: In what country is the body of water that runs under Old London Bridge located? 
Knowledge Triplets: River Thames, common.topic.webpage, m.09xltpj
Chronicles of London bridge, book.written_work.subjects, Old London Bridge
Kent, location.location.events, Caesar's invasions of Britain
m.02_56pg, location.adjoining_relationship.adjoins, River Thames
Reading, location.location.containedby, England
Great Synagogue of London, architecture.structure.architect, George Dance the Elder
Body Of Water Spanned, type.property.schema, Bridge
Demolition, base.schemastaging.context_name.pronunciation, g.125_ph0x0
m.0j8lh46, location.adjoining_relationship.adjoins, River Thames
Nathaniel Dance-Holland, people.person.gender, Male
England, location.administrative_division.first_level_division_of, United Kingdom
United Kingdom, base.locations.countries.continent, Europe
Lot's Ait, geography.island.body_of_water, River Thames
George Dance the Elder, architecture.architect.structures_designed, St Botolph's Aldgate
River, freebase.type_profile.strict_included_types, Topic
Locale, rdf-schema#domain, Bridge
Isleworth Ait, location.location.containedby, United Kingdom
George Dance the Elder, people.person.children, Nathaniel Dance-Holland
m.0wg9n1x, location.partial_containment_relationship.partially_contained_by, Kent
River Thames, symbols.name_source.namesakes, Thames River
St Botolph-without-Bishopsgate, location.location.containedby, United Kingdom
Frithuswith, people.person.place_of_birth, River Thames
River Thames, location.location.events, The Boat Race 2012
George Dance the Elder, architecture.architect.structures_designed, Mansion House, London
Bridge, type.type.domain, Transportation
Reading, base.biblioness.bibs_location.country, United Kingdom
River Thames, location.location.adjoin_s, m.0832slc
River Thames, geography.body_of_water.islands, Lot's Ait
m.0g4wm79, architecture.ownership.structure, Old London Bridge
Bridges, rdf-schema#range, Bridge
England, base.biblioness.bibs_location.country, United Kingdom
River Thames, travel.tourist_attraction.near_travel_destination, Reading
River Thames, location.location.adjoin_s, m.049x3_9
Clearance Below, type.property.schema, Bridge
United Kingdom, location.country.first_level_divisions, England
m.0wg9n1x, location.partial_containment_relationship.partially_contains, River Thames
River Thames, location.location.adjoin_s, m.049x40w
Old London Bridge, common.topic.article, m.075rt7z
m.049x405, location.adjoining_relationship.adjoins, River Thames
River Thames, common.topic.notable_for, g.1257z5x06
Woolwich foot tunnel, base.undergroundhumanthings.underground_object.underneath, River Thames
Bridge, freebase.type_profile.published, Published
River, freebase.type_profile.published, Published
River Thames, common.topic.image, The Thames in London
Bridge, type.type.expected_by, Bridges of this type
Bridge, type.type.properties, Clearance Below
France, location.location.containedby, Europe
River Thames, geography.body_of_water.islands, Canvey Island
Old London Bridge, architecture.structure.architect, Isembert de Saintes
The Boat Race 2012, time.event.locations, River Thames
Kent, location.administrative_division.second_level_division_of, England
Kent, location.location.containedby, England
River Thames, geography.river.basin_countries, England
Total Length, type.property.schema, Bridge
Bridge Type, type.property.reverse_property, Bridges of this type
m.049x40w, location.adjoining_relationship.adjoins, River Thames
Bridge, type.type.properties, Locale
Peter Colechurch, common.topic.notable_for, g.125501b4m
Reading, location.administrative_division.country, United Kingdom
Oliver's Island, location.location.containedby, United Kingdom
River Thames, common.topic.image, London Thames Sunset panorama - Feb 2008
St Botolph-without-Bishopsgate, architecture.structure.architect, George Dance the Elder
Thames River, symbols.namesake.named_after, River Thames
London, travel.travel_destination.tour_operators, Adventures by Disney - England and France Vacation
Lower Thames Crossing, common.topic.notable_types, Location
m.0wg9mlk, location.partial_containment_relationship.partially_contains, River Thames
Old London Bridge (1616) by Claes Van Visscher, common.image.appears_in_topic_gallery, Old London Bridge
Oliver's Island, geography.island.body_of_water, River Thames
Frog Island, London, geography.island.body_of_water, River Thames
Bridge, type.type.expected_by, Bridges
m.0wg9mlk, location.partial_containment_relationship.partially_contained_by, London
Nathaniel Dance-Holland, people.person.parents, George Dance the Elder
River Thames, location.location.events, Marchioness disaster
Two Tree Island, location.location.containedby, United Kingdom
m.0g4wm79, architecture.ownership.owner, Bridge House Estates
Kent, base.biblioness.bibs_location.country, England
Total Length, rdf-schema#domain, Bridge
m.075rt7z, common.document.content, m.075rt86
Adventures by Disney - England and France Vacation, travel.tour_operator.travel_destinations, River Thames
Book, freebase.type_profile.strict_included_types, Topic
Old London Bridge, common.topic.webpage, m.075rshc
France, location.location.primarily_containedby, Europe
Chiswick Eyot, geography.island.body_of_water, River Thames
Bridge, type.type.properties, Bridge Type
Monk, people.profession.people_with_this_profession, Peter Colechurch
Thames Tunnel, base.undergroundhumanthings.underground_object.underneath, River Thames
Woolwich foot tunnel, common.topic.notable_types, Structure
Reading, travel.travel_destination.tourist_attractions, River Thames
Old London Bridge, common.topic.image, Old London Bridge (1616) by Claes Van Visscher
River Thames, location.location.partially_containedby, Kent
Maidenhead, travel.travel_destination.tourist_attractions, River Thames
George Dance the Elder, architecture.architect.structures_designed, Old London Bridge
George Dance the Elder, common.topic.article, m.03f0v3
Locale, type.property.expected_type, Location
River Thames, travel.tourist_attraction.near_travel_destination, Maidenhead
River Thames, base.proposedprojects.proposed_project_focus.projects, Lower Thames Crossing
River Thames, geography.geographical_feature.category, River
Chronicles of London bridge, book.book.editions, Chronicles of London bridge
Book, freebase.type_profile.published, Published
River Thames, location.location.containedby, United Kingdom
River Thames, geography.river.mouth_long_lat, m.04njpy_
River Thames, geography.body_of_water.islands, Oliver's Island
m.04nrby2, location.adjoining_relationship.adjoins, River Thames
River Thames, travel.tourist_attraction.near_travel_destination, Richmond, London
Great Synagogue of London, location.location.containedby, United Kingdom
River Thames, book.book_subject.works, Three Men in a Boat
Old London Bridge, common.topic.notable_types, Bridge
m.075rshc, common.webpage.category, Topic Webpage
Isembert de Saintes, people.person.nationality, France
Bridge, freebase.type_hints.included_types, Topic
Mansion House, London, architecture.structure.architect, George Dance the Younger
Body Of Water Spanned, rdf-schema#domain, Bridge
m.049x40b, location.adjoining_relationship.adjoins, River Thames
St Botolph's Aldgate, location.location.containedby, United Kingdom
George Dance the Elder, people.person.nationality, England
George Dance the Elder, architecture.architect.structures_designed, St Botolph-without-Bishopsgate
Peter Colechurch, common.topic.notable_types, Architect
Kent, location.location.partiallycontains, m.0wg9n1x
Canvey Island, geography.island.body_of_water, River Thames
Caesar's invasions of Britain, time.event.locations, River Thames
m.075rshc, common.webpage.resource, m.0bllbmn
Old London Bridge, architecture.structure.destroyed_by, Demolition
River Thames, location.location.containedby, Europe
River Thames, location.location.partially_contained_by, m.0wg9mlk
Bridge, freebase.type_hints.included_types, Structure
Isembert de Saintes, people.person.profession, Monk
George Dance the Elder, common.topic.notable_for, g.1256fvbv_
Kent, location.administrative_division.country, United Kingdom
Bridge Type, type.property.schema, Bridge
London, location.location.containedby, England
St Leonard's, Shoreditch, architecture.structure.architect, George Dance the Elder
River Thames, location.location.adjoin_s, m.049x40h
Thames Tunnel, location.location.containedby, United Kingdom
London, location.location.containedby, United Kingdom
Europe, base.locations.continents.countries_within, United Kingdom
Bridge, type.type.properties, Width
River Thames, geography.river.basin_countries, England
River Thames, location.location.people_born_here, Frithuswith
m.0832slc, location.adjoining_relationship.adjoins, River Thames
Isembert de Saintes, projects.project_participant.projects, m.0j9tfpt
Richmond, London, location.location.containedby, London
Locale, type.property.schema, Bridge
River Thames, geography.body_of_water.islands, Two Tree Island
River Thames, location.location.people_born_here, Jimmy Clarken
Bridge, freebase.type_profile.kind, Definition
United Kingdom, location.location.containedby, Europe
Henley-on-Thames, travel.travel_destination.tourist_attractions, River Thames
Architect, freebase.type_hints.included_types, Topic
Bridge, type.type.properties, Total Length
Peter Colechurch, people.person.gender, Male
River Thames, location.location.partially_contained_by, m.0wg9n1x
Bridge, type.type.properties, Body Of Water Spanned
Mansion House, London, architecture.structure.architect, George Dance the Elder
Old London Bridge, architecture.structure.architect, Peter Colechurch
River Thames, location.location.adjoin_s, m.049x400
Structure, freebase.type_hints.included_types, Topic
Monk, people.profession.people_with_this_profession, Isembert de Saintes
Isembert de Saintes, architecture.architect.structures_designed, Old London Bridge
River Thames, location.location.containedby, Europe
Rowing at the 1908 Summer Olympics – Men's coxless four, time.event.locations, River Thames
Richmond, London, travel.travel_destination.tourist_attractions, River Thames
Old London Bridge, base.architecture2.structure2.lead_designer, Peter Colechurch
Isembert de Saintes, common.topic.notable_types, Architect
Richmond, London, location.location.containedby, England
Isle of Sheppey, geography.island.body_of_water, River Thames
England, location.country.capital, London
Book, freebase.type_profile.kind, Definition
River Thames, geography.body_of_water.islands, Isle of Sheppey
River Thames, base.undergroundhumanthings.location_on_top_of_something_buried.underground_object, Thames Tunnel
River Thames, location.location.containedby, England
River Thames, geography.river.origin, Thames Head
James Dance, people.person.gender, Male
Kent, location.location.containedby, United Kingdom
England, location.administrative_division.country, United Kingdom
River Thames, location.location.adjoin_s, m.02shnt5
Location, freebase.type_hints.included_types, Topic
George Dance the Elder, people.person.children, James Dance
m.09xltpj, common.webpage.topic, River Thames
London, location.location.partially_contains, River Thames
London, location.location.partiallycontains, m.0wg9mlk
Greenwich foot tunnel, base.undergroundhumanthings.underground_object.underneath, River Thames
River Thames, location.location.events, Rowing at the 1908 Summer Olympics – Men's coxless four
Two Tree Island, geography.island.body_of_water, River Thames
Three Men in a Boat, common.topic.notable_types, Book
Bridge, freebase.type_profile.strict_included_types, Structure
London, base.biblioness.bibs_location.country, United Kingdom
George Dance the Elder, people.person.nationality, England
River Thames, location.location.events, Caesar's invasions of Britain
Nathaniel Dance-Holland, people.person.nationality, England
Bridge Type, owl#inverseOf, Bridges of this type
Location, freebase.type_profile.published, Published
Structure, freebase.type_profile.strict_included_types, Topic
Lower Horse, geography.island.body_of_water, River Thames
Old London Bridge, architecture.structure.architect, George Dance the Elder
Bridge, freebase.type_hints.included_types, Location
River Thames, base.undergroundhumanthings.location_on_top_of_something_buried.underground_object, Greenwich foot tunnel
Demolition, common.topic.image, PerthOldMyerBuildingAnim gobeirne
Architect, freebase.equivalent_topic.equivalent_type, Architect
Peter Colechurch, people.deceased_person.place_of_burial, Old London Bridge
River Thames, geography.body_of_water.islands, Isleworth Ait
River Thames, geography.body_of_water.islands, Chiswick Eyot
Isleworth Ait, geography.island.body_of_water, River Thames
Douglas Osborne, people.person.place_of_birth, River Thames
Rowing at the 1908 Summer Olympics – Men's eight, time.event.locations, River Thames
Lot's Ait, location.location.containedby, United Kingdom
m.049x3tw, location.adjoining_relationship.adjoins, River Thames
Architect, freebase.type_profile.equivalent_topic, Architect
River, freebase.type_profile.strict_included_types, Location
m.049x3_k, location.adjoining_relationship.adjoins, River Thames
France, location.location.partially_containedby, Europe
m.02shnt5, location.adjoining_relationship.adjoins, River Thames
Caesar's invasions of Britain, time.event.locations, Kent
River, freebase.equivalent_topic.equivalent_type, River
River, freebase.type_profile.equivalent_topic, River
Old London Bridge, architecture.structure.architect, George Dance the Elder
River Thames, travel.travel_destination.tour_operators, Adventures by Disney - England and France Vacation
Old London Bridge, book.book_subject.works, Chronicles of London bridge
Peter Colechurch, people.person.profession, Monk
m.049x40q, location.adjoining_relationship.adjoins, River Thames
George Dance the Elder, people.person.profession, Architect
Peter Colechurch, base.architecture2.architectural_designer.structures_designed, Old London Bridge
Richmond, London, location.location.containedby, United Kingdom
Henley-on-Thames, location.location.containedby, United Kingdom
Body Of Water Spanned, type.property.master_property, Bridges
England, location.location.containedby, United Kingdom
Peter Colechurch, architecture.architect.structures_designed, Old London Bridge
River Thames, geography.body_of_water.islands, Frog Island, London
River Thames, geography.river.mouth, Thames Estuary
Old London Bridge, location.location.contains, Nonesuch House
m.075rshc, common.webpage.topic, Old London Bridge
River Thames, location.location.events, Rowing at the 1908 Summer Olympics – Men's single sculls
Locale, rdf-schema#range, Location
Europe, location.location.partially_contains, France
Frog Island, London, location.location.containedby, United Kingdom
River Thames, location.location.events, Rowing at the 1908 Summer Olympics – Men's coxless pair
Europe, location.location.contains_major_portion_of, France
Bridge Type, rdf-schema#domain, Bridge
United Kingdom, location.country.capital, London
Thames Head, common.topic.notable_types, Location
Isembert de Saintes, common.topic.notable_for, g.125fs18l3
River, freebase.type_hints.included_types, Location
River Thames, location.location.adjoin_s, m.0j8lh46
George Dance the Elder, architecture.architect.structures_designed, St Leonard's, Shoreditch
River Thames, location.location.adjoin_s, m.049x3_k
Old London Bridge, common.topic.notable_for, g.1258wmx7n
Mansion House, London, common.topic.notable_types, Structure
River Thames, common.topic.article, m.0d2l3
River Thames, location.location.containedby, United Kingdom
Kent, location.location.partially_contains, River Thames
Bridge House Estates, architecture.architectural_structure_owner.structures_owned, m.0g4wm79
Architect, people.profession.corresponding_type, Architect
Old London Bridge, base.architecture2.structure2.lead_designer, Isembert de Saintes
River Thames, location.location.people_born_here, Douglas Osborne
Bridge, freebase.type_profile.strict_included_types, Location
United Kingdom, base.aareas.schema.administrative_area.administrative_children, England
Structure, freebase.type_hints.included_types, Location
River Thames, base.ontologies.ontology_instance.equivalent_instances, m.09klvvm
Marchioness disaster, time.event.locations, River Thames
Old London Bridge, people.place_of_interment.interred_here, Peter Colechurch
Old London Bridge (1616) by Claes Van Visscher, common.image.size, m.029rgks
George Dance the Elder, common.topic.notable_types, Architect
Reading, location.location.containedby, United Kingdom
Battle of the Kentish Knock, time.event.locations, River Thames
Old London Bridge, transportation.bridge.body_of_water_spanned, River Thames
Thames River, common.topic.notable_types, River
River Thames, location.location.partially_containedby, London
Bridges, owl#inverseOf, Body Of Water Spanned
Chronicles of London bridge, common.topic.notable_types, Book
m.0j9cnc0, projects.project_participation.participant, Isembert de Saintes
River Thames, geography.body_of_water.islands, Brentford Ait
Jimmy Clarken, people.person.place_of_birth, River Thames
River Thames, location.location.people_born_here, Rhona Haszard
River, freebase.type_hints.included_types, Topic
Bridges, type.property.reverse_property, Body Of Water Spanned
Henley-on-Thames, base.biblioness.bibs_location.country, England
James Dance, people.person.nationality, England
Old London Bridge, architecture.structure.owner, m.0g4wm79
London, base.biblioness.bibs_topic.subsumes, London
Bridge, type.type.properties, Number of spans
m.049x3_9, location.adjoining_relationship.adjoins, River Thames
Structure, freebase.type_profile.published, Published
Clearance Below, rdf-schema#domain, Bridge
River Thames, location.location.adjoin_s, m.049x3tw
Chronicles of London bridge, book.written_work.author, Richard Thomson
River Thames, location.location.adjoin_s, m.049x40q
River Thames, location.location.adjoin_s, m.049x40b
George Dance the Elder, people.person.children, George Dance the Younger
Isembert de Saintes, projects.project_participant.projects, m.0j9cnc0
London Thames Sunset panorama - Feb 2008, common.image.appears_in_topic_gallery, River Thames
Three Men in a Boat, book.written_work.subjects, River Thames
River, freebase.type_profile.kind, Definition
Isembert de Saintes, people.person.gender, Male
River Thames, base.undergroundhumanthings.location_on_top_of_something_buried.underground_object, Woolwich foot tunnel
Thames Tunnel, common.topic.notable_types, Structure
Nonesuch House, common.topic.notable_for, g.1259145yf
River Thames, location.location.adjoin_s, m.049x405
George Dance the Elder, architecture.architect.structures_designed, Great Synagogue of London
River Thames, location.location.adjoin_s, m.046x0hs
Bridge, type.type.properties, Longest Span
Book, freebase.type_hints.included_types, Topic
James Dance, people.person.parents, George Dance the Elder
Demolition, common.topic.article, m.02zrvv
Rhona Haszard, people.person.place_of_birth, River Thames
River Thames, geography.body_of_water.islands, Lower Horse
Old London Bridge, transportation.bridge.body_of_water_spanned, River Thames
m.046x0hs, location.adjoining_relationship.adjoins, River Thames
Maidenhead, location.location.containedby, United Kingdom
Architect, freebase.type_profile.strict_included_types, Topic
Rowing at the 1908 Summer Olympics – Men's single sculls, time.event.locations, River Thames
Topic, freebase.type_profile.published, Published
m.049x400, location.adjoining_relationship.adjoins, River Thames
Chiswick Eyot, location.location.containedby, United Kingdom
Mansion House, London, location.location.containedby, United Kingdom
River Thames, location.location.events, Above the Below
Structure, freebase.type_profile.strict_included_types, Location
Bridges, type.property.expected_type, Bridge
Lower Horse, location.location.containedby, United Kingdom
Brentford Ait, geography.island.body_of_water, River Thames
River Thames, location.location.adjoin_s, m.02_56pg
Maidenhead, location.location.containedby, England
Chronicles of London bridge, common.topic.notable_for, g.12586g391
London, location.administrative_division.country, United Kingdom
George Dance the Elder, people.person.gender, Male
St Botolph's Aldgate, architecture.structure.architect, George Dance the Elder
Nonesuch House, common.topic.notable_types, Location
Nonesuch House, location.location.containedby, Old London Bridge
Brentford Ait, location.location.containedby, United Kingdom
Nathaniel Dance-Holland, people.person.place_of_birth, London
Jimmy Clarken, people.person.gender, Male
Above the Below, time.event.locations, River Thames
River Thames, location.location.adjoin_s, m.04nrby2
River Thames, geography.river.cities, London
River Thames, location.location.events, Battle of the Kentish Knock
Isle of Sheppey, location.location.containedby, Kent
River Thames, geography.river.origin_long_lat, m.04njp_s
Bridge, freebase.type_profile.strict_included_types, Topic
Architect, freebase.type_profile.published, Published
Bridge, freebase.type_profile.equivalent_topic, Bridge
Isembert de Saintes, base.architecture2.architectural_designer.structures_designed, Old London Bridge
River Thames, common.topic.notable_types, River
m.09klvvm, base.ontologies.ontology_instance_mapping.freebase_topic, River Thames
m.0j9tfpt, projects.project_participation.participant, Isembert de Saintes
England, base.aareas.schema.administrative_area.administrative_parent, United Kingdom
Greenwich foot tunnel, common.topic.notable_types, Structure
m.049x40h, location.adjoining_relationship.adjoins, River Thames
The Thames in London, common.image.appears_in_topic_gallery, River Thames
Three Men in a Boat, book.written_work.subjects, England
Isle of Sheppey, common.topic.notable_types, Location
River Thames, travel.tourist_attraction.near_travel_destination, Henley-on-Thames
Lower Thames Crossing, base.proposedprojects.proposed_project.project_focus, River Thames
Rowing at the 1908 Summer Olympics – Men's coxless pair, time.event.locations, River Thames
London, base.biblioness.bibs_topic.is_really, London
Bridge, common.topic.article, m.03bqfkm
Adventures by Disney - England and France Vacation, travel.tour_operator.travel_destinations, London
Demolition, base.architecture2.destruction_method2.structures_destroyed_this_way, Arlington Apartments demolition
Henley-on-Thames, location.location.containedby, England
River Thames, location.location.events, Rowing at the 1908 Summer Olympics – Men's eight
m.0bllbmn, common.resource.annotations, m.075rshc

Answer: Europe
England
United Kingdom