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: Were does the body of water under Governor Harry W. Nice Memorial bridge flow into? 
Knowledge Triplets: Fairfax Stone Historical Monument State Park, location.location.containedby, West Virginia
Washington, D.C., location.administrative_division.country, United States of America
West Virginia, location.location.partially_contains, Appalachian Mountains
Appalachian Mountains, location.location.containedby, North America
West Virginia, location.administrative_division.country, United States of America
Mid-Atlantic states, location.location.contains, Virginia
Arlington Memorial Bridge, location.location.containedby, Potomac River
Potomac River, location.location.containedby, United States of America
Potomac River, location.location.contains, Point Lookout Light
West Virginia, base.locations.states_and_provences.country, United States of America
Total Length, rdf-schema#domain, Bridge
Mid-Atlantic states, location.location.contains, Potomac River
m.0wg8n_9, location.partial_containment_relationship.partially_contains, Potomac River
Virginia, base.aareas.schema.administrative_area.administrative_parent, United States of America
Potomac River, location.location.contains, Mathias Point Light
Daniel Boone Bridge, transportation.bridge.bridge_type, Cantilever bridge
Design and Construction of the Governor Harry W. Nice Memorial Bridge, common.topic.notable_types, Project
Maryland, location.location.partially_contains, Chesapeake Bay
Charles County, location.administrative_division.second_level_division_of, United States of America
Maryland, location.location.partially_contains, Potomac River
Construction of Arlington Memorial Bridge, common.topic.notable_types, Project
Potomac River, geography.body_of_water.bridges, Bloomington Viaduct
Mark Twain Memorial Bridge, transportation.bridge.bridge_type, Continuous truss bridge
Virginia, location.location.partially_contains, Great Falls
Key Bridge, freebase.valuenotation.has_value, Clearance Below
Virginia, base.biblioness.bibs_location.country, United States of America
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Delaware River–Turnpike Toll Bridge
Bridge Type, owl#inverseOf, Bridges of this type
Bridges, rdf-schema#range, Bridge
m.0wg927r, location.partial_containment_relationship.partially_contained_by, Maryland
United States of America, location.location.partially_containedby, North America
Hastings High Bridge, common.topic.notable_types, Bridge
Potomac River, geography.river.mouth, Chesapeake Bay
King George County, base.aareas.schema.administrative_area.administrative_parent, Virginia
Lacon Bridge, transportation.bridge.bridge_type, Continuous truss bridge
United States of America, base.biblioness.bibs_topic.is_really, United States of America
Washington, D.C., location.location.containedby, United States of America
River, freebase.type_hints.included_types, Location
River, freebase.type_profile.strict_included_types, Location
Mid-Delaware Bridge, common.topic.notable_types, Bridge
Body Of Water Spanned, type.property.schema, Bridge
m.0wg8n_9, location.partial_containment_relationship.partially_contained_by, Virginia
Hastings High Bridge, transportation.bridge.bridge_type, Continuous truss bridge
Governor Harry W. Nice Memorial Bridge, common.topic.notable_types, Bridge
Virginia, location.administrative_division.first_level_division_of, United States of America
Great Falls, location.location.containedby, Potomac River
Maryland, base.locations.states_and_provences.country, United States of America
North America, location.location.contains_major_portion_of, United States of America
Virginia, location.location.partially_contains, Chesapeake Bay
City/Town/Village, freebase.type_profile.strict_included_types, Location
Chester Bridge, common.topic.notable_types, Bridge
Potomac River, geography.body_of_water.bridges, Harpers Ferry Bridge
North America, location.location.partially_contains, United States of America
Bridge, type.type.properties, Width
Washington, D.C., common.topic.notable_types, City/Town/Village
Potomac River, geography.body_of_water.bridges, Bayard Bridge
Bridge, type.type.expected_by, Bridges of this type
Virginia, base.locations.states_and_provences.country, United States of America
Virginia, location.administrative_division.country, United States of America
City/Town/Village, freebase.type_profile.strict_included_types, Topic
Vanport Bridge, transportation.bridge.bridge_type, Continuous truss bridge
Mark Twain Memorial Bridge, common.topic.notable_types, Bridge
Structure, freebase.type_profile.strict_included_types, Location
City/Town/Village, freebase.type_profile.published, Published
Bridge, type.type.properties, Clearance Below
River, freebase.type_profile.published, Published
Governor Harry W. Nice Memorial Bridge, geography.body_of_water.bridges, Potomac River
Theodore Roosevelt Bridge, freebase.valuenotation.has_value, Structural Height
Dahlgren, location.location.containedby, United States of America
Continuous truss bridge, common.topic.image, Astoria-Megler Bridge is North America's longest continuous truss bridge.
Charles M. Braga Jr. Memorial Bridge, transportation.bridge.bridge_type, Continuous truss bridge
Bridge, freebase.type_profile.strict_included_types, Structure
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Liberty Bend Bridge
Bridge, type.type.domain, Transportation
Mid-Atlantic states, location.location.contains, Washington, D.C.
Governor Harry W. Nice Memorial Bridge, transportation.bridge.locale, Newburg, Maryland
Potomac River, location.location.contains, Upper Cedar Point Light
United States of America, location.country.administrative_divisions, West Virginia
King George County, location.location.containedby, Virginia
Total Length, rdf-schema#range, Floating Point Number
Lacon Bridge, common.topic.notable_types, Location
Structural Height, rdf-schema#domain, Structure
North America, location.location.time_zones, Eastern Time Zone
Location, freebase.type_profile.published, Published
Bridge Type, rdf-schema#range, Bridge Type
Potomac River, geography.body_of_water.bridges, Key Bridge
Potomac River, common.topic.notable_types, River
Maryland, location.location.partially_contains, Great Falls
Cantilever bridge, common.topic.image, The Pierre Pflimlin bridge is a balanced cantilever made of concrete, shown here under construction.
Dahlgren, location.hud_county_place.place, Dahlgren
Newburg, Maryland, location.citytown.postal_codes, 20664
United States of America, base.locations.countries.states_provinces_within, Maryland
Bridge Type, type.property.expected_type, Bridge Type
Arlington Memorial Bridge, transportation.bridge.locale, Washington, D.C.
Potomac River, geography.body_of_water.bridges, Arlington Memorial Bridge
Dahlgren, location.hud_foreclosure_area.total_90_day_vacant_residential_addresses, m.07cjt70
Virginia, location.location.containedby, United States of America
United States of America, base.locations.countries.states_provinces_within, West Virginia
Potomac River, geography.river.origin, Appalachian Mountains
Potomac River, location.location.contains, Lower Cedar Point Light
Maryland, base.aareas.schema.administrative_area.administrative_parent, United States of America
Potomac River, geography.body_of_water.bridges, Governor Harry W. Nice Memorial Bridge
Bridge, freebase.type_hints.included_types, Structure
Cantilever bridge, common.topic.notable_for, g.1258l5kkb
Dahlgren, location.hud_foreclosure_area.total_residential_addresses, m.07cjt77
Washington, D.C., location.location.partially_contains, Potomac River
Bridge, freebase.type_hints.included_types, Location
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Francis Scott Key Bridge
Bloomington Viaduct, transportation.bridge.body_of_water_spanned, Potomac River
Clearance Below, type.property.unit, Meter
Potomac River, location.location.partially_containedby, Washington, D.C.
Potomac River, common.topic.article, m.0g52s
Virginia, base.aareas.schema.administrative_area.administrative_children, King George County
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Milton–Madison Bridge
United States of America, base.locations.countries.states_provinces_within, Virginia
m.07nh392, base.ontologies.ontology_instance_mapping.freebase_topic, Potomac River
Chesapeake Bay, location.location.containedby, United States of America
Mid-Delaware Bridge, transportation.bridge.bridge_type, Continuous truss bridge
Bridges, owl#inverseOf, Body Of Water Spanned
City/Town/Village, freebase.type_profile.kind, Definition
Potomac River, common.topic.notable_for, g.1259plgx_
Newburg, Maryland, location.location.people_born_here, Allyn Rose
Harpers Ferry, location.location.time_zones, Eastern Time Zone
Dahlgren, location.location.time_zones, Eastern Time Zone
Arlington Memorial Bridge, transportation.bridge.body_of_water_spanned, Potomac River
Theodore Roosevelt Bridge, freebase.valuenotation.has_value, Clearance Below
Charles County, location.location.containedby, Maryland
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Mid-Delaware Bridge
I-35W Mississippi River bridge, common.topic.notable_types, Bridge
Continuous truss bridge, common.topic.article, m.0d0pv5
Bridge Type, rdf-schema#domain, Bridge
Locale, rdf-schema#domain, Bridge
Potomac River, location.location.containedby, North America
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Kingston–Rhinecliff Bridge
King George County, location.administrative_division.second_level_division_of, United States of America
United States of America, location.country.first_level_divisions, Washington, D.C.
Dahlgren, location.location.containedby, Virginia
Virginia, location.location.partially_contains, Potomac River
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Walden Low Bridge
Washington, D.C., base.biblioness.bibs_topic.subsumes, Washington, D.C.
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, John T. Loughran Bridge
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Carrollton–Prestonville Bridge
Maryland, base.biblioness.bibs_location.country, United States of America
Betsy Ross Bridge, common.topic.notable_types, Bridge
Design and Construction of the Governor Harry W. Nice Memorial Bridge, projects.project.project_focus, Governor Harry W. Nice Memorial Bridge
Governor Harry W. Nice Memorial Bridge, common.topic.article, m.0466bn
Design and Construction of the Governor Harry W. Nice Memorial Bridge, common.topic.notable_for, g.1yl5qydwx
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Chester Bridge
Liberty Bend Bridge, common.topic.notable_types, Bridge
King George County, location.us_county.hud_county_place, Dahlgren
Locale, rdf-schema#range, Location
Daniel Boone Bridge, transportation.bridge.bridge_type, Continuous truss bridge
Potomac River, location.location.partially_contained_by, m.0wg8pbh
Governor Harry W. Nice Memorial Bridge, transportation.bridge.bridge_type, Cantilever bridge
Clearance Below, type.property.schema, Bridge
Governor Harry W. Nice Memorial Bridge, transportation.bridge.bridge_type, Continuous truss bridge
Total Length, type.property.schema, Bridge
Dahlgren, location.hud_foreclosure_area.ofheo_price_change, m.07cjt7p
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Newark Bay Bridge
Washington, D.C., location.hud_county_place.place, Washington, D.C.
Dahlgren, location.statistical_region.population, m.04l_fn1
Bridge, freebase.type_profile.equivalent_topic, Bridge
Structural Height, type.property.schema, Structure
Body Of Water Spanned, rdf-schema#domain, Bridge
Julien Dubuque Bridge, common.topic.notable_types, Bridge
Charles M. Braga Jr. Memorial Bridge, common.topic.notable_types, Bridge
Key Bridge, transportation.bridge.body_of_water_spanned, Potomac River
Harpers Ferry, common.topic.notable_types, City/Town/Village
Daniel Boone Bridge, common.topic.notable_types, Bridge
Bridge, freebase.type_profile.published, Published
Total Length, type.property.unit, Meter
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Sciotoville Bridge
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Glover Cary Bridge
Location, freebase.type_hints.included_types, Topic
Virginia, location.location.time_zones, Eastern Time Zone
Cantilever bridge, common.topic.image, Cantilever bridge
Locale, type.property.schema, Bridge
Key Bridge, freebase.valuenotation.has_value, Structural Height
King George County, location.location.containedby, United States of America
US Census Designated Place, freebase.type_profile.published, Published
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Governor Harry W. Nice Memorial Bridge
Potomac River, geography.body_of_water.bridges, Woodrow Wilson Bridge
US Census Designated Place, freebase.type_profile.strict_included_types, Topic
West Virginia, location.administrative_division.first_level_division_of, United States of America
Harrynicebridge603, common.image.appears_in_topic_gallery, Morgantown Generating Station
West Virginia, location.location.containedby, Mid-Atlantic states
Dahlgren, common.topic.image, VAMap-doton-Dahlgren
Total Length, type.property.expected_type, Floating Point Number
Structural Height, type.property.expected_type, Floating Point Number
Bridge, type.type.properties, Total Length
Structural Height, rdf-schema#range, Floating Point Number
Great Falls, location.location.containedby, United States of America
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Don N. Holt Bridge
United States of America, location.country.first_level_divisions, Maryland
Newburg, Maryland, location.statistical_region.population, g.11bc886sq6
Bridge, freebase.type_profile.kind, Definition
Potomac River, common.topic.image, アメリカ東部 ポトマック川流域の土地利用図、1997年
Topic, freebase.type_profile.published, Published
West Virginia, base.biblioness.bibs_location.country, United States of America
Bridge, type.type.properties, Body Of Water Spanned
Julien Dubuque Bridge, transportation.bridge.bridge_type, Continuous truss bridge
West Virginia, location.location.partiallycontains, m.0wg8pbh
Chesapeake Bay, location.location.partially_containedby, Virginia
Washington, D.C., base.aareas.schema.administrative_area.administrative_parent, United States of America
Washington, D.C., base.biblioness.bibs_topic.is_really, Washington, D.C.
Potomac River, location.location.contains, Ragged Point Light
United States of America, location.country.capital, Washington, D.C.
Mid-Atlantic states, location.location.contains, Maryland
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Hart Bridge
m.0wg9d6x, location.partial_containment_relationship.partially_contains, Potomac River
Potomac River, location.location.containedby, Mid-Atlantic states
Governor Harry W. Nice Memorial Bridge, transportation.bridge.locale, Dahlgren
Cantilever bridge, common.topic.article, m.03lzl0
Potomac River, location.location.contains, Cobb Point Bar Light
Construction of Arlington Memorial Bridge, projects.project.project_focus, Arlington Memorial Bridge
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Taylor–Southgate Bridge
m.0wg8pbh, location.partial_containment_relationship.partially_contained_by, West Virginia
Maryland, location.administrative_division.country, United States of America
Potomac River, location.location.partially_containedby, West Virginia
Bridge, common.topic.article, m.03bqfkm
United States of America, base.aareas.schema.administrative_area.administrative_children, West Virginia
Bridge, freebase.type_hints.included_types, Topic
Potomac River, base.ontologies.ontology_instance.equivalent_instances, m.07nh392
City/Town/Village, freebase.type_hints.included_types, Topic
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Newburgh–Beacon Bridge
United States of America, location.location.time_zones, Eastern Time Zone
United States of America, location.location.primarily_containedby, North America
Continuous truss bridge, common.topic.notable_for, g.1256glg9m
Clearance Below, rdf-schema#domain, Bridge
Potomac River, location.location.partially_contained_by, m.0wg9d6x
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Betsy Ross Bridge
Julien Dubuque Bridge, freebase.valuenotation.has_value, Structural Height
Woodrow Wilson Bridge, transportation.bridge.body_of_water_spanned, Potomac River
Potomac River, geography.river.cities, Harpers Ferry
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Mark Twain Memorial Bridge
West Virginia, location.location.time_zones, Eastern Time Zone
United States of America, base.biblioness.bibs_topic.subsumes, United States of America
Delaware River–Turnpike Toll Bridge, transportation.bridge.bridge_type, Continuous truss bridge
Daniel Boone Bridge, freebase.valuenotation.has_value, Clearance Below
Potomac River, location.location.partially_containedby, Maryland
King George County, location.location.contains, Dahlgren
Newburg, Maryland, common.topic.notable_for, g.125bwr2rx
United States of America, base.aareas.schema.administrative_area.administrative_children, Maryland
m.0wg8pbh, location.partial_containment_relationship.partially_contains, Potomac River
Bloomington Viaduct, location.location.containedby, Maryland
m.0wg9d6x, location.partial_containment_relationship.partially_contained_by, Washington, D.C.
Governor Harry W. Nice Memorial Bridge, projects.project_focus.projects, Design and Construction of the Governor Harry W. Nice Memorial Bridge
Clearance Below, type.property.expected_type, Floating Point Number
Charles M. Braga Jr. Memorial Bridge, transportation.bridge.bridge_type, Cantilever bridge
Potomac River, location.location.partially_containedby, Virginia
Dahlgren, location.hud_foreclosure_area.bls_unemployment_rate, m.07cjt7h
Clearance Below, rdf-schema#range, Floating Point Number
Harpers Ferry, location.location.containedby, West Virginia
Area code 540, location.location.containedby, Virginia
Newburg, Maryland, location.location.time_zones, Eastern Time Zone
Bridges, type.property.expected_type, Bridge
Potomac River, location.location.contains, Construction of Arlington Memorial Bridge
Governor Harry W. Nice Memorial Bridge, common.topic.notable_for, g.12561xxv9
Construction of Arlington Memorial Bridge, location.location.containedby, Potomac River
Governor Harry W. Nice Memorial Bridge, transportation.bridge.body_of_water_spanned, Potomac River
Key Bridge, location.location.containedby, Washington, D.C.
Locale, type.property.expected_type, Location
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Champlain Bridge
Platte Purchase Bridge, common.topic.notable_types, Bridge
Potomac River, geography.river.origin, Fairfax Stone Historical Monument State Park
Cantilever bridge, common.topic.notable_types, Bridge Type
Charles County, location.location.time_zones, Eastern Time Zone
Appalachian Mountains, location.location.partially_containedby, West Virginia
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Lacon Bridge
Washington, D.C., location.location.containedby, Mid-Atlantic states
Theodore Roosevelt Bridge, transportation.bridge.locale, Washington, D.C.
River, freebase.type_hints.included_types, Topic
Newburg, Maryland, common.topic.article, m.09gdnjm
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Julien Dubuque Bridge
Arlington Memorial Bridge, projects.project_focus.projects, Construction of Arlington Memorial Bridge
Structure, freebase.type_hints.included_types, Location
Potomac River, location.location.contains, Potomac Palisades Site
Potomac River, geography.body_of_water.bridges, Theodore Roosevelt Bridge
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Charles M. Braga Jr. Memorial Bridge
Dahlgren, location.hud_foreclosure_area.estimated_number_foreclosures, m.07cjt6k
Delaware River–Turnpike Toll Bridge, common.topic.notable_types, Bridge
Maryland, location.location.containedby, United States of America
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Jeremiah Morrow Bridge
West Virginia, base.aareas.schema.administrative_area.administrative_parent, United States of America
Structural Height, type.property.unit, Meter
Great Falls, location.location.partially_containedby, Virginia
Structure, freebase.type_hints.included_types, Topic
Harpers Ferry, location.hud_county_place.place, Harpers Ferry
River, freebase.type_profile.strict_included_types, Topic
I-35W Mississippi River bridge, transportation.bridge.bridge_type, Continuous truss bridge
Potomac River, geography.body_of_water.bridges, Aqueduct Bridge
Woodrow Wilson Bridge, common.topic.notable_types, Bridge
Dahlgren, location.hud_county_place.county, King George County
Bridge, type.type.expected_by, Bridges
Potomac River, location.location.partially_contained_by, m.0wg8n_9
US Census Designated Place, freebase.type_hints.included_types, Location
City/Town/Village, freebase.type_hints.included_types, Location
Dahlgren, location.hud_foreclosure_area.estimated_number_of_mortgages, m.07cjt6t
Newburg, Maryland, location.location.containedby, Charles County
I-35W Mississippi River bridge, freebase.valuenotation.has_value, Structural Height
Maryland, location.location.partiallycontains, m.0wg927r
Woodrow Wilson Bridge, freebase.valuenotation.has_value, Structural Height
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Rochester–Monaca Bridge
Key Bridge, common.topic.notable_types, Bridge
Newburg, Maryland, common.topic.notable_types, City/Town/Village
Dahlgren, location.location.geolocation, m.02kjs76
United States of America, location.country.first_level_divisions, West Virginia
United States of America, base.aareas.schema.administrative_area.administrative_children, Virginia
Maryland, location.location.time_zones, Eastern Time Zone
Newburg, Maryland, location.location.containedby, 20664
Betsy Ross Bridge, transportation.bridge.bridge_type, Continuous truss bridge
Governor Harry W. Nice Memorial Bridge, common.topic.image, Harrynicebridge603
Theodore Roosevelt Bridge, common.topic.notable_types, Bridge
Cape Girardeau Bridge, transportation.bridge.bridge_type, Continuous truss bridge
United States of America, location.country.administrative_divisions, Maryland
West Virginia, location.location.containedby, United States of America
Harrynicebridge603, common.image.size, m.02910pv
Chesapeake Bay, location.location.partially_containedby, Maryland
Bridge Type, type.property.reverse_property, Bridges of this type
Arlington Memorial Bridge, freebase.valuenotation.has_value, Structural Height
Bridge, type.type.properties, Bridge Type
Structure, type.type.properties, Structural Height
Bridge Type, type.property.schema, Bridge
Bridge, freebase.type_profile.strict_included_types, Location
United States of America, location.country.first_level_divisions, Virginia
Dahlgren, location.location.containedby, King George County
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Robert C. Byrd Bridge
Potomac River, location.location.contains, Great Falls
Body Of Water Spanned, type.property.master_property, Bridges
Harrynicebridge603, common.image.appears_in_topic_gallery, Governor Harry W. Nice Memorial Bridge
Maryland, location.administrative_division.first_level_division_of, United States of America
Dahlgren, common.topic.notable_for, g.125dcm6m3
United States of America, location.country.administrative_divisions, Virginia
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Cape Girardeau Bridge
Potomac River, location.location.contains, Arlington Memorial Bridge
Washington, D.C., location.location.partiallycontains, m.0wg9d6x
Newburg, Maryland, location.location.containedby, Maryland
Great Falls, location.location.partially_containedby, Maryland
United States of America, location.country.administrative_divisions, Washington, D.C.
Cape Girardeau Bridge, common.topic.notable_types, Bridge
United States of America, base.aareas.schema.administrative_area.administrative_children, Washington, D.C.
River, freebase.type_profile.kind, Definition
Virginia, location.location.partially_contains, Appalachian Mountains
Governor Harry W. Nice Memorial Bridge, freebase.valuenotation.has_value, Structural Height
Platte Purchase Bridge, transportation.bridge.bridge_type, Continuous truss bridge
Dahlgren, common.topic.article, m.010mzh
Potomac River, location.location.partially_contained_by, m.0wg927r
Chesapeake Bay, location.location.containedby, North America
Newburg, Maryland, location.location.geolocation, m.0499vnz
Washington, D.C., base.biblioness.bibs_location.country, United States of America
Harpers Ferry, location.location.containedby, United States of America
Virginia, location.location.partiallycontains, m.0wg8n_9
Continuous truss bridge, common.topic.notable_types, Bridge Type
Maryland, location.location.containedby, Mid-Atlantic states
Potomac River, geography.body_of_water.bridges, Chain Bridge
Bridge, type.type.properties, Longest Span
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Hastings High Bridge
Dahlgren, location.statistical_region.population, g.11bc858_26
Theodore Roosevelt Bridge, transportation.bridge.body_of_water_spanned, Potomac River
Chester Bridge, transportation.bridge.bridge_type, Continuous truss bridge
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Vanport Bridge
Washington, D.C., location.administrative_division.first_level_division_of, United States of America
Mid-Atlantic states, location.location.contains, West Virginia
Mid-Atlantic states, location.location.containedby, United States of America
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Ikitsuki Bridge
Appalachian Mountains, location.location.partially_containedby, Virginia
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Monaca–East Rochester Bridge
Structure, freebase.type_profile.strict_included_types, Topic
Arlington Memorial Bridge, freebase.valuenotation.has_value, Clearance Below
Vanport Bridge, common.topic.notable_types, Bridge
Virginia, location.location.containedby, Mid-Atlantic states
Dahlgren, location.hud_foreclosure_area.hhuniv, m.07cjt69
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, I-35W Mississippi River bridge
Theodore Roosevelt Bridge, location.location.containedby, Washington, D.C.
Arlington Memorial Bridge, common.topic.notable_types, Bridge
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Sewickley Bridge
West Virginia, location.location.partially_contains, Potomac River
North America, base.locations.continents.countries_within, United States of America
King George County, location.location.time_zones, Eastern Time Zone
Liberty Bend Bridge, transportation.bridge.bridge_type, Continuous truss bridge
US Census Designated Place, freebase.type_hints.included_types, Topic
Bridge, type.type.properties, Number of spans
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Platte Purchase Bridge
Potomac River, geography.river.mouth, Chesapeake Bay
Bridges, type.property.reverse_property, Body Of Water Spanned
Continuous truss bridge, transportation.bridge_type.bridges_of_this_type, Daniel Boone Bridge
m.0wg927r, location.partial_containment_relationship.partially_contains, Potomac River
Bridge, type.type.properties, Locale
Dahlgren, base.wikipedia_infobox.settlement.area_code, Area code 540
Bridge, freebase.type_profile.strict_included_types, Topic
Governor Harry W. Nice Memorial Bridge, location.location.geolocation, m.0wmh7hq
Washington, D.C., location.location.time_zones, Eastern Time Zone
Dahlgren, common.topic.notable_types, US Census Designated Place
Potomac River, location.location.contains, Maryland Point Light
United States of America, base.locations.countries.continent, North America
Potomac River, geography.body_of_water.bridges, American Legion Memorial Bridge
Structure, freebase.type_profile.published, Published

Answer: Chesapeake Bay