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 time is in london heathrow? 
Knowledge Triplets: London Eye, location.location.time_zones, UTC±00:00
London Heathrow Terminal 5, architecture.structure.architecture_firm, Rogers Stirk Harbour & Partners
London Southend Airport, location.location.containedby, England
British Airways, base.schemastaging.organization_extra.phone_number, m.010rtssz
m.04kc8_4, aviation.airport_runway.airport, London Heathrow Airport
London, common.topic.subject_of, Xakir.com
DSCF1934d submitted, common.image.appears_in_topic_gallery, London Heathrow Airport
m.0w_8v9f, location.mailing_address.citytown, London Heathrow Airport
m.09wyw91, common.webpage.topic, British Airways
British European Airways, organization.organization.headquarters, m.09rn494
London Heathrow Airport, aviation.airport.hub_for, Lufthansa
London Heathrow Airport, aviation.airport.serves, SOAS, University of London
Heathrow Airport Holdings, common.topic.webpage, m.03lpqr6
British Isles, location.location.contains, London City Airport
GB Airways, aviation.airline.focus_cities, London Heathrow Airport
London Heathrow Terminal 4, common.topic.image, Term4
London Heathrow Airport, aviation.airport.number_of_passengers, m.04g54_l
London, location.administrative_division.country, United Kingdom
London Heathrow Terminal 3, location.location.containedby, England
British Airways, base.schemastaging.organization_extra.phone_number, m.0pm2_qd
Heathrow Airport Holdings, business.employer.employees, m.03lpqr1
m.047j613, organization.organization_merger.organizations_merging, British Overseas Airways Corporation
Lydd Airport, aviation.airport.serves, London
Hillingdon, common.topic.image, Sheraton Skyline Hotel at London Heathrow is located in Greater London
Meteor Parking, organization.organization.geographic_scope, London Heathrow Airport
London, travel.travel_destination.tourist_attractions, Euston railway station
Airport terminal, common.topic.image, London Heathrow T5 AB1
London Heathrow Terminal 5, aviation.airport_terminal.airport, London Heathrow Airport
Yotel London Heathrow, location.location.nearby_airports, London Heathrow Airport
Luton Airport, aviation.airport.serves, SOAS, University of London
London Heathrow Airport, organization.organization_scope.organizations_with_this_scope, Pink Elephant
London, travel.travel_destination.tourist_attractions, Palace of Westminster
London Stansted Airport, organization.organization_scope.organizations_with_this_scope, Meteor Parking
Yotel London Heathrow, architecture.structure.architectural_style, Modern architecture
British Eagle, aviation.airline.hubs, London Heathrow Airport
London Heathrow Airport, location.location.containedby, London
Qantas, aviation.airline.focus_cities, London Heathrow Airport
London, travel.travel_destination.climate, m.051qr9d
Heathrow Airport Holdings, aviation.airport_operator.airports_operated, London Heathrow Airport
London Heathrow Airport, common.topic.image, DSCF1934d submitted
Brentford, common.topic.image, Sheraton Skyline Hotel at London Heathrow is located in Greater London
London Heathrow Airport, aviation.airport.hub_for, Skyways Limited
Airport terminal, architecture.building_function.buildings, London Heathrow Terminal 2 – The Queen's Terminal
London Stansted Airport, location.location.containedby, British Isles
London Heathrow Airport, travel.transport_terminus.travel_destinations_served, m.051l_1q
Yotel London Heathrow, travel.accommodation.features, Hotspot
London Heathrow Airport, aviation.airport.airlines, m.09rn42l
Heathrow, common.topic.article, m.0n9z6
Heathrow Airport Holdings, common.topic.notable_types, Business Operation
Yotel London Heathrow, travel.accommodation.accommodation_type, Capsule hotel
Gatwick Airport, aviation.airport.serves, London
Heathrow, location.location.containedby, London
London Heathrow Airport, film.film_location.featured_in_films, Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb
London Heathrow Terminal 2 – The Queen's Terminal, architecture.structure.architecture_firm, Luis Vidal and Architects
British Airways, base.schemastaging.organization_extra.phone_number, m.0pm2zf0
London City Airport, aviation.airport.hub_for, British Airways
1948 Summer Olympics, time.event.locations, London
London Heathrow Airport, aviation.airport.hub_for, British Eagle
London Heathrow Airport, aviation.airport.airlines, m.09rn465
London Heathrow Airport, aviation.airport.hub_for, British Overseas Airways Corporation
Western European Time Zone, time.time_zone.day_dst_ends, Last Sunday in October
British Airways, aviation.airline.hubs, London City Airport
London Heathrow Airport, aviation.airport.runway_information, m.04kc8_4
London Heathrow Airport, aviation.airport.airport_type, Public airport
London Heathrow Airport, location.location.events, 1984 London Heathrow Airport bombing
London Heathrow Terminal 4, location.location.geolocation, m.0cm3znd
Conrad London St. James, location.location.nearby_airports, London Heathrow Airport
British Airways, base.ontologies.ontology_instance.equivalent_instances, m.07ndnc6
Emirates, aviation.airline.focus_cities, London Heathrow Airport
University of Oxford, location.location.nearby_airports, London Heathrow Airport
London Ambulance Service, government.government_agency.jurisdiction, London
Lufthansa, aviation.airline.hubs, London Heathrow Airport
London Heathrow Terminal 5, projects.project_focus.projects, Design and Construction of the London Heathrow Terminal 5
London Heathrow Airport, aviation.airport.airlines, m.09rn46x
London Heathrow Terminal 3, freebase.valuenotation.has_value, Architectural Style
London Heathrow Terminal 5, architecture.structure.architect, Mike Davies
Hunting-Clan Air Transport, aviation.airline.hubs, London Heathrow Airport
Heathrow Airport Holdings, aviation.airport_operator.airports_operated, Edinburgh Airport
Tower of London, travel.tourist_attraction.near_travel_destination, London
London Heathrow Airport, aviation.airport.operator, Heathrow Airport Holdings
London Heathrow Terminal 4, common.topic.notable_types, Location
Millennium Bridge, London, transportation.bridge.locale, London
m.065pcpm, base.popstra.vacation_choice.location, London
London, travel.travel_destination.tourist_attractions, London Underground
British Airways, base.schemastaging.organization_extra.phone_number, m.010rxsmm
London Heathrow Terminal 4, common.topic.notable_for, g.125ft3390
London Southend Airport, location.location.containedby, British Isles
m.09rn45z, aviation.airline_airport_presence.airport, London Heathrow Airport
London, location.statistical_region.population, m.0kmq4rx
London, travel.travel_destination.tourist_attractions, Tate Modern, London
Pan Am Flight 103, aviation.airliner_accident.flight_origin, London Heathrow Airport
Heathrow, location.location.geolocation, m.0dcb60y
London Heathrow Airport, common.topic.image, Heathrow Airport radar tower P1180333
Hillingdon, location.location.contains, London Heathrow Airport
Gulf Air, aviation.airline.focus_cities, London Heathrow Airport
The Landmark London, location.location.containedby, City of Westminster
London Heathrow Airport, organization.organization_scope.organizations_with_this_scope, Meteor Parking
London Heathrow Terminal 4, common.topic.image, Heathrow LON 04 07 77
Meteor Parking, common.topic.subject_of, London Heathrow Airport
London City Airport, location.location.containedby, England
London, location.location.nearby_airports, Luton Airport
British Summer Time, common.topic.notable_types, Time Zone
Air India, aviation.airline.focus_cities, London Heathrow Airport
London Stansted Airport, aviation.airport.serves, London
The Landmark London, location.location.containedby, London
Slough, location.location.nearby_airports, London Heathrow Airport
London Heathrow Terminal 2 – The Queen's Terminal, architecture.building.building_function, Airport terminal
London Heathrow Terminal 5, architecture.structure.architect, Richard Rogers
London Heathrow Airport, aviation.airport.airlines, m.09rn42d
m.0b6r776, common.webpage.topic, British Airways
Singapore Airlines, aviation.airline.focus_cities, London Heathrow Airport
London Heathrow Airport, common.topic.article, m.03jng
London Heathrow Airport, aviation.airport.serves, Conrad London St. James
British European Airways, aviation.airline.airports_served, m.09rn42d
London Heathrow Terminal 3, common.topic.notable_types, Building
m.0b6s1n9, common.webpage.topic, Heathrow Airport Holdings
Canadian Affair, aviation.airline.hubs, London Heathrow Airport
London, base.popstra.location.vacationers, m.065pcpm
Bellview Airlines, aviation.airline.focus_cities, London Heathrow Airport
London Heathrow Airport, aviation.airport.serves, Yotel London Heathrow
Heathrow, common.topic.notable_for, g.125cjypjw
Heathrow Airport Holdings, common.topic.article, m.02xlfl
London Heathrow Airport, aviation.airport.airlines, m.09rn45r
London Heathrow Terminal 2 – The Queen's Terminal, location.location.geolocation, m.0z8fmn2
London Eye, location.location.time_zones, Greenwich Mean Time Zone
Pan American World Airways, aviation.airline.hubs, London Heathrow Airport
British Airways, base.schemastaging.organization_extra.phone_number, m.0pm30jn
London Heathrow Airport, base.schemastaging.context_name.pronunciation, g.125_py319
Church Times, book.newspaper.circulation_areas, London
British Airways, common.topic.webpage, m.0b6r776
m.07ldqq2, common.webpage.topic, British Airways
London Heathrow Airport, aviation.airport.airlines, m.09rn46p
British South American Airways, aviation.airline.hubs, London Heathrow Airport
Heathrow Terminal 5 airside 020, common.image.size, m.029nt2h
m.09dvkyx, base.ontologies.ontology_instance_mapping.freebase_topic, London Heathrow Airport
London Ambulance Service, organization.organization.place_founded, Greater London
m.064ss88, base.popstra.vacation_choice.location, London
m.09rn46p, aviation.airline_airport_presence.airport, London Heathrow Airport
London Heathrow Airport, aviation.airport.focus_city_for, Air India
Yotel London Heathrow, location.location.containedby, London Heathrow Terminal 4
Uxbridge, common.topic.image, Sheraton Skyline Hotel at London Heathrow is located in Greater London
London Heathrow Terminal 4, common.topic.article, m.057xmp5
Heathrow Airport Holdings, aviation.airport_operator.airports_operated, Naples International Airport
London Heathrow Airport, aviation.airport.hub_for, BMI Regional
Heathrow Airport Holdings, aviation.airport_operator.airports_operated, Glasgow Airport
m.0nbwf2r, organization.leadership.organization, Heathrow Airport Holdings
London Southend Airport, common.topic.notable_types, Airport
London Heathrow Terminal 3, freebase.valuenotation.has_value, Floors
London Heathrow Airport, aviation.airport.serves, 20 Northmoor Road
Heathrow Airport Holdings, common.topic.image, BAAHeathrowBuilding
Heathrow Airport Holdings, aviation.airport_operator.airports_operated, Southampton Airport
Luton Airport, aviation.airport.serves, London
m.03lpqr1, business.employment_tenure.company, Heathrow Airport Holdings
London Stansted Airport, aviation.airport.serves, SOAS, University of London
Heathrow, common.topic.image, Sheraton Skyline Hotel at London Heathrow is located in Greater London
Yotel London Heathrow, location.location.geolocation, m.012vq7xn
m.03l0196, business.employment_tenure.company, Heathrow Airport Holdings
m.03l3f85, common.webpage.topic, London Heathrow Airport
Yotel London Heathrow, location.location.time_zones, Greenwich Mean Time Zone
Skyways Limited, aviation.airline.hubs, London Stansted Airport
London Heathrow Airport, aviation.airport.hub_for, British South American Airways
British European Airways, aviation.airline.airports_served, m.09rn45r
Skyways Limited, aviation.airline.hubs, London Heathrow Airport
London Heathrow Terminal 1, common.topic.notable_for, g.125d12tqj
Heathrow Airport Holdings, common.topic.webpage, m.0b6s1n9
London Heathrow Terminal 3, location.location.geolocation, m.0131199g
London Stansted Airport, location.location.containedby, England
London Heathrow Terminal 2 – The Queen's Terminal, location.location.containedby, London Heathrow Airport
British Isles, location.location.contains, London Heathrow Airport
Naples International Airport, aviation.airport.operator, Heathrow Airport Holdings
London Heathrow Airport, location.location.containedby, United Kingdom
Heathrow Airport Holdings, business.employer.employees, m.02t7jwl
London Heathrow Terminal 5, common.topic.image, ZEMA0003
London Charterhouse, travel.tourist_attraction.near_travel_destination, London
London Heathrow Airport, freebase.valuenotation.is_reviewed, Time zone(s)
London, location.location.time_zones, Greenwich Mean Time Zone
Public airport, aviation.airport_type.airports_of_this_type, London Heathrow Airport
London Heathrow Terminal 3, location.location.containedby, London Heathrow Airport
British Airways, common.topic.webpage, m.0g4x_bg
British Mediterranean Airways, aviation.airline.hubs, London Heathrow Airport
British Isles, location.location.contains, London Southend Airport
Yotel London Heathrow, location.location.street_address, m.012vq8rm
Heathrow Airport Holdings, organization.organization.headquarters, m.03lpqqx
London Heathrow Airport, base.ontologies.ontology_instance.equivalent_instances, m.09dvkyx
m.09rn465, aviation.airline_airport_presence.airport, London Heathrow Airport
m.09rn473, aviation.airline_airport_presence.airport, London Heathrow Airport
London Heathrow Airport, aviation.airport.hub_for, Hunting-Clan Air Transport
London Heathrow Airport, aviation.airport.hub_for, British Airways
London Heathrow Terminal 3, freebase.valuenotation.has_value, Architect
London Heathrow Airport, common.topic.webpage, m.03l3f85
London Heathrow Terminal 2 – The Queen's Terminal, freebase.valuenotation.has_no_value, Opened
Virgin Atlantic, aviation.airline.hubs, London Heathrow Airport
British Airways, common.topic.webpage, m.07ldqq2
m.051l_1q, travel.transportation.transport_terminus, London Stansted Airport
The London 2012 Summer Olympics, olympics.olympic_games.host_city, London
London Heathrow Terminal 2 – The Queen's Terminal, location.location.containedby, England
Yotel London Heathrow, travel.hotel.operating_brand, YOTEL
London Heathrow Airport, location.location.contains, London Heathrow Terminal 3
Aberdeen Airport, aviation.airport.operator, Heathrow Airport Holdings
Heathrow, symbols.name_source.namesakes, London Heathrow Airport
Greenwich Mean Time Zone, common.topic.article, m.03bf4
Greater London, location.location.time_zones, Greenwich Mean Time Zone
London Heathrow Terminal 2 – The Queen's Terminal, architecture.structure.architect, Luis Vidal
m.051l_1q, travel.transportation.transport_terminus, London Heathrow Airport
British Airways, common.topic.webpage, m.09wyw91
London Stansted Airport, organization.organization_scope.organizations_with_this_scope, Pink Elephant
London Heathrow Airport, aviation.airport.focus_city_for, Singapore Airlines
London, olympics.olympic_host_city.olympics_hosted, 1908 Summer Olympics
Airport terminal, common.topic.image, Heathrow Terminal 5 airside 020
London Heathrow Airport, location.location.containedby, British Isles
Heathrow Airport Holdings, organization.organization.parent, m.04kjv1n
Edinburgh Airport, aviation.airport.operator, Heathrow Airport Holdings
Pink Elephant, common.topic.subjects, London Stansted Airport
London City Airport, common.topic.notable_types, Airport
British Airways, base.schemastaging.organization_extra.contact_webpages, m.010pn5gp
Yotel London Heathrow, travel.accommodation.features, Free Wi-Fi
Financial Times, book.newspaper.circulation_areas, London
London Underground, travel.tourist_attraction.near_travel_destination, London
British Airways, common.topic.webpage, m.03lg_v0
London, base.popstra.location.vacationers, m.064ss88
Heathrow Airport Holdings, aviation.airport_operator.airports_operated, Aberdeen Airport
London, location.location.nearby_airports, London City Airport
London Heathrow Terminal 5, common.topic.article, m.0411nkl
Heathrow Airport Holdings, business.employer.employees, m.02t7kys
London Heathrow Terminal 2 – The Queen's Terminal, common.topic.article, m.09gb2w0
London Heathrow Airport, aviation.airport.airlines, m.09rn420
London, travel.travel_destination.tourist_attractions, Westminster Abbey
m.051qr9d, travel.travel_destination_monthly_climate.travel_destination, London
London Heathrow Airport, aviation.airport.serves, London
Yotel London Heathrow, architecture.structure.owner, m.012vq8z7
London Heathrow Airport, aviation.airport.hub_for, bmi
m.0bbs_z0, organization.organization_board_membership.organization, British Airways
Greater London, location.location.time_zones, UTC±00:00
London Heathrow Terminal 1, aviation.airport_terminal.airport, London Heathrow Airport
Meteor Parking, organization.organization.locations, London Stansted Airport
London Heathrow Terminal 5, location.location.geolocation, m.0wmk76x
London, location.location.nearby_airports, London Stansted Airport
SOAS, University of London, location.location.nearby_airports, London City Airport
London Heathrow Airport, aviation.airport.focus_city_for, Emirates
London Heathrow Airport, common.topic.notable_types, Airport
London Heathrow Airport, aviation.airport.terminals, London Heathrow Terminal 5
London Heathrow Terminal 3, common.topic.notable_for, g.1yl5s8x5k
Hilton London Syon Park, location.location.nearby_airports, London Heathrow Airport
London Heathrow Airport, aviation.airport.focus_city_for, Bellview Airlines
London Stansted Airport, common.topic.subjects, Meteor Parking
London, location.location.containedby, United Kingdom
London Underground, metropolitan_transit.transit_system.area_served, Greater London
British Isles, location.location.contains, London Stansted Airport
British Airways, aviation.airline.hubs, London Heathrow Airport
bmi, aviation.airline.hubs, London Heathrow Airport
m.02t7jwl, business.employment_tenure.company, Heathrow Airport Holdings
London Heathrow Airport, aviation.airport.hub_for, British European Airways
London Heathrow Airport, aviation.airport.serves, Slough
London Heathrow Airport, location.location.geolocation, m.02_gy5f
London, travel.travel_destination.tourist_attractions, London Charterhouse
London Heathrow Terminal 3, location.location.containedby, London
London Heathrow Airport, common.topic.subjects, Meteor Parking
Yotel London Heathrow, travel.accommodation.features, Monsoon Showers
Yotel London Heathrow, common.topic.subjects, Transit hotel
London Stansted Airport, aviation.airport.serves, Cambridge Airport
London Heathrow Airport, symbols.namesake.named_after, Heathrow
London Borough of Hillingdon, location.location.nearby_airports, London Heathrow Airport
London Heathrow Terminal 2 – The Queen's Terminal, freebase.valuenotation.has_value, Floors
London, travel.travel_destination.tourist_attractions, University of London
British Airways, common.topic.webpage, m.09y17ll
British Summer Time, time.time_zone.locations_in_this_time_zone, Slough
London Heathrow Terminal 2 – The Queen's Terminal, freebase.valuenotation.has_value, Architectural Style
m.02t7kys, business.employment_tenure.company, Heathrow Airport Holdings
London, location.location.nearby_airports, Gatwick Airport
m.051l_1q, travel.transportation.travel_destination, London
Yotel London Heathrow, travel.hotel.operated_by, YOTEL
Yotel London Heathrow, architecture.structure.architecture_firm, Rockwell Group
London Heathrow Airport, aviation.airport.airlines, m.09rn45z
Yotel London Heathrow, common.topic.notable_types, Hotel
London, common.topic.subject_of, Cenk Aydin
London, location.location.partially_contains, River Thames
20 Northmoor Road, location.location.nearby_airports, London Heathrow Airport
London, common.topic.notable_for, g.1257t9db1
London, travel.travel_destination.local_transportation, London Underground
1984 London Heathrow Airport bombing, time.event.locations, London Heathrow Airport
British Overseas Airways Corporation, common.topic.image, Boac 707 at london airport in 1964 arp
Yotel London Heathrow, architecture.structure.architectural_style, Functionalism
Dawson's Field hijackings, aviation.airliner_accident.flight_destination, London Heathrow Airport
London Heathrow Airport, aviation.airport.hub_for, Pan American World Airways
m.09rn42l, aviation.airline_airport_presence.airport, London Heathrow Airport
London Heathrow Airport, aviation.airport.serves, Adventures by Disney - England and France Vacation
m.05k7816, aviation.airline_airport_presence.airline, British Airways
London Heathrow Airport, aviation.airport.airlines, m.09rn473
London, travel.travel_destination.tourist_attractions, Tramp
Yotel London Heathrow, common.topic.notable_for, g.1258vg09k
Heathrow, common.topic.notable_types, Location
Heathrow Airport Holdings, business.employer.employees, m.0k1svjp
Staines-upon-Thames, common.topic.image, Sheraton Skyline Hotel at London Heathrow is located in Greater London
London Heathrow Airport, aviation.airport.terminals, London Heathrow Terminal 1
London Heathrow Terminal 3, common.topic.article, m.0ndhhhm
Heathrow Airport radar tower P1180333, common.image.size, m.022pw9_
British European Airways, aviation.airline.hubs, London Heathrow Airport
Shooting at the 1948 Summer Olympics – Men's 50 metre pistol, time.event.locations, London
SOAS, University of London, location.location.nearby_airports, London Stansted Airport
SOAS, University of London, location.location.time_zones, Greenwich Mean Time Zone
British Isles, location.location.time_zones, UTC±00:00
Heathrow Airport Holdings, business.business_operation.industry, Transportation
London Heathrow Airport, aviation.airport.hub_for, Virgin Atlantic
London Heathrow Terminal 2 – The Queen's Terminal, common.topic.notable_types, Building
London Heathrow Airport, aviation.airport.focus_city_for, Qantas
London Heathrow Airport, location.location.containedby, Hillingdon
Glasgow Airport, aviation.airport.operator, Heathrow Airport Holdings
London Heathrow Airport, aviation.airport.focus_city_for, GB Airways
London Heathrow Airport, aviation.airport.focus_city_for, Gulf Air
London, location.location.nearby_airports, Lydd Airport
London Heathrow Airport, aviation.airport.serves, University of Oxford
Yotel London Heathrow, architecture.structure.architecture_firm, Softroom
Yotel London Heathrow, architecture.structure.architectural_style, Contemporary architecture
London Heathrow Terminal 5, common.topic.image, Heathrow T5
London, travel.travel_destination.tourist_attractions, Royal Institution
m.04kjv1n, organization.organization_relationship.child, Heathrow Airport Holdings
London Heathrow Airport, location.location.time_zones, Greenwich Mean Time Zone
London Heathrow Terminal 5, base.schemastaging.context_name.pronunciation, m.011gn2vw
Adventures by Disney - England and France Vacation, location.location.nearby_airports, London Heathrow Airport
m.09rn426, aviation.airline_airport_presence.airport, London Heathrow Airport
m.012vq8z7, architecture.ownership.structure, Yotel London Heathrow
Airport terminal, architecture.building_function.buildings, London Heathrow Terminal 3
1984 London Heathrow Airport bombing, common.topic.article, m.0jt03w3
Southampton Airport, aviation.airport.operator, Heathrow Airport Holdings
m.047hr_r, aviation.airline_airport_presence.airline, Emirates
Heathrow Airport Holdings, organization.organization.headquarters, m.0z9s0sj
Heathrow Terminal 5 airside 020, common.image.appears_in_topic_gallery, London Heathrow Airport
London Eye, travel.tourist_attraction.near_travel_destination, London
British European Airways, aviation.airline.accidents, 1950 Heathrow BEA Vickers Viking accident
British European Airways, aviation.airline.airports_served, m.09rn420
m.09rn45r, aviation.airline_airport_presence.airport, London Heathrow Airport
London Heathrow Terminal 4, location.location.containedby, United Kingdom
London Heathrow Airport, aviation.airport.number_of_aircraft_movements, m.04g54_s
London, travel.travel_destination.tourist_attractions, London Eye
Heathrow Airport Holdings, common.topic.notable_for, g.125dhx12g
London Heathrow Terminal 5, common.topic.notable_for, g.1259pqzl_
London Heathrow Terminal 4, location.location.contains, Yotel London Heathrow
m.09rn46g, aviation.airline_airport_presence.airport, London Heathrow Airport
1908 Summer Olympics, time.event.locations, London
Mike Davies, architecture.architect.structures_designed, London Heathrow Terminal 5
London Heathrow Terminal 2 – The Queen's Terminal, common.topic.notable_for, g.1yg6d1s0g
London Heathrow Airport, common.topic.image, Heathrow Terminal 5 airside 020
London Heathrow Terminal 1, common.topic.notable_types, Location
London Heathrow Airport, aviation.airport.focus_city_for, Cyprus Airways
London Stansted Airport, business.business_location.parent_company, Meteor Parking
England, freebase.valuenotation.is_reviewed, Time zone(s)
BMI Regional, aviation.airline.hubs, London Heathrow Airport
Gatwick Airport, location.location.time_zones, Greenwich Mean Time Zone
London Heathrow Airport, location.location.time_zones, Greenwich Mean Time Zone
London City Airport, aviation.airport.serves, London
Heathrow Airport Holdings, business.employer.number_of_employees, m.0f7psr3
London Heathrow Airport, aviation.airport.terminals, London Heathrow Terminal 3
1948 Summer Olympics, olympics.olympic_games.host_city, London
m.04kc8_d, aviation.airport_runway.airport, London Heathrow Airport
London Heathrow Airport, aviation.airport.runway_information, m.04kc8_d
1908 Summer Olympics, olympics.olympic_games.host_city, London
London City Airport, aviation.airport.serves, SOAS, University of London
The London 2012 Summer Olympics, time.event.locations, London
London Heathrow Airport, location.location.contains, London Heathrow Terminal 2 – The Queen's Terminal
London Heathrow Terminal 1, common.topic.article, m.057xmnt
London Heathrow Terminal 3, base.schemastaging.context_name.pronunciation, m.011nlmrm
London, location.location.containedby, England
Heathrow Terminal 5 airside 020, common.image.appears_in_topic_gallery, Airport terminal
m.0k1svjp, business.employment_tenure.company, Heathrow Airport Holdings
London Heathrow Airport, aviation.airport.airlines, m.09rn46g
London Heathrow Airport, aviation.airport.terminals, London Heathrow Terminal 4
Heathrow, common.topic.image, Heathrow Before World War II Map
London Stansted Airport, travel.transport_terminus.travel_destinations_served, m.051l_1q
London City Airport, location.location.containedby, British Isles
London, location.location.nearby_airports, London Heathrow Airport
London, olympics.olympic_host_city.olympics_hosted, 1948 Summer Olympics
London Stansted Airport, common.topic.subject_of, Pink Elephant
British Airways, common.topic.image, DH Comet 1 BOAC Heathrow 1953
London Heathrow Airport, aviation.airport.serves, Hilton London Syon Park
Heathrow Airport Holdings, business.employer.employees, m.03l0196
London Heathrow Terminal 3, architecture.building.building_function, Airport terminal
Western European Time Zone, time.time_zone.day_dst_begins, Last Sunday in March
London Heathrow Terminal 2 – The Queen's Terminal, location.location.containedby, London
London Heathrow Terminal 3, aviation.airport_terminal.airport, London Heathrow Airport
SOAS, University of London, location.location.nearby_airports, London Heathrow Airport
Pink Elephant, organization.organization.geographic_scope, London Heathrow Airport
Cambridge Airport, location.location.time_zones, Greenwich Mean Time Zone
London Stansted Airport, common.topic.notable_types, Airport
London, base.biblioness.bibs_location.country, United Kingdom
London Heathrow Terminal 5, common.topic.image, London Heathrow T5 AB1
British Overseas Airways Corporation, aviation.airline.hubs, London Heathrow Airport
London Heathrow Terminal 2 – The Queen's Terminal, common.topic.image, Heathrow Terminal 2 under construction
Slough, location.location.time_zones, British Summer Time
London Heathrow Terminal 4, aviation.airport_terminal.airport, London Heathrow Airport
Gatwick Airport, aviation.airport.serves, SOAS, University of London
London City Airport, travel.transport_terminus.travel_destinations_served, m.051l_1q
m.03lpqr6, common.webpage.topic, Heathrow Airport Holdings
Heathrow Airport radar tower P1180333, common.image.appears_in_topic_gallery, London Heathrow Airport
London Heathrow Terminal 5, common.topic.notable_types, Building
London Heathrow Terminal 2 – The Queen's Terminal, architecture.structure.architecture_firm, Foster and Partners
British Airways, common.topic.article, m.01998
Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb, film.film.featured_film_locations, London Heathrow Airport
London, travel.travel_destination.tourist_attractions, Tower of London
London Heathrow Terminal 1, location.location.geolocation, m.0wm_k2t
London Heathrow Airport, aviation.airport.serves, London Borough of Hillingdon
m.07ndnc6, base.ontologies.ontology_instance_mapping.freebase_topic, British Airways
Heathrow Airport Holdings, organization.organization.leadership, m.0nbwf2r
London, travel.travel_destination.how_to_get_here, m.051l_1q
London Heathrow Airport, aviation.airport.hub_for, Canadian Affair
m.09y17ll, common.webpage.topic, British Airways
m.09rn420, aviation.airline_airport_presence.airport, London Heathrow Airport
London Stansted Airport, aviation.airport.hub_for, Skyways Limited
m.051l_1q, travel.transportation.transport_terminus, London City Airport
London Heathrow Airport, aviation.airport.airlines, m.09rn426
London Underground, metropolitan_transit.transit_system.area_served, London
m.09rn42d, aviation.airline_airport_presence.airport, London Heathrow Airport
m.09rn46x, aviation.airline_airport_presence.airport, London Heathrow Airport
British Airways, common.topic.notable_for, g.1257pmfnq
Cyprus Airways, aviation.airline.focus_cities, London Heathrow Airport
London Heathrow Airport, common.topic.notable_for, g.1258m_jxt
London Heathrow Airport, aviation.airport.hub_for, British Mediterranean Airways

Answer: Greenwich Mean Time Zone