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 body of water does the river under Arlington Bridge flow into? 
Knowledge Triplets: Arlington Forest, location.location.containedby, Virginia
Arlington County, location.statistical_region.population, m.0hjy4n5
Arlington County, location.location.people_born_here, Michele J. Sison
Arlington Memorial Bridge, common.image.appears_in_topic_gallery, Arlington Memorial Bridge
Arlington County, location.location.people_born_here, James Parks
Arlington County, location.statistical_region.population, m.0kgp13x
m.0h7y9bd, location.adjoining_relationship.adjoins, Arlington County
Arlington Memorial Bridge, film.film_location.featured_in_films, A Few Good Men
Arlington County, travel.travel_destination.tourist_attractions, United States Air Force Memorial
Arlington County, location.location.people_born_here, Mark Linkous
Arlington County, location.statistical_region.rent50_4, m.05ggf96
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
Arlington County, location.location.people_born_here, Sam Stitt
Arlington County, location.location.people_born_here, Lucian Restivo
Yousef Abu-Taleb, people.person.place_of_birth, Arlington County
Susie Bright, people.person.place_of_birth, Arlington County
Arlington County, location.statistical_region.population, g.11x1fx9hm
Arlington County, location.statistical_region.population, m.0hmldnd
Arlington County, location.statistical_region.population, m.066cz2j
Rachael Yamagata, people.person.place_of_birth, Arlington County
Arlington County, base.aareas.schema.administrative_area.capital, Arlington
Arlington County, location.statistical_region.population, g.1jmcbhr4b
Arlington County, location.statistical_region.population, m.0hjy4mj
Arlington County, location.statistical_region.population, m.066cz2q
Body Of Water Spanned, rdf-schema#domain, Bridge
Rich Sauveur, people.person.place_of_birth, Arlington County
Arlington County, film.film_location.featured_in_films, Dancer in the Dark
Arlington Memorial Bridge, location.location.containedby, Potomac River
Arlington County, location.location.people_born_here, DeStorm Power
Arlington County, location.location.people_born_here, Thomas Peter Logtens
Arlington County, location.statistical_region.co2_emissions_residential, m.045jrd8
Arlington County, location.statistical_region.population, m.0jtf0z7
Braverman & Lin, organization.organization.place_founded, Arlington Va
Construction of Arlington Memorial Bridge, projects.project.project_focus, Arlington Memorial Bridge
Arlington, location.location.containedby, Arlington County
Arlington County, location.statistical_region.population, g.12b01xx8p
Construction of Arlington Memorial Bridge, projects.project.participants, m.0j96pvj
Arlington County, location.location.adjoin_s, m.04swm2d
Potomac River, location.location.contains, Lower Cedar Point Light
Potomac River, geography.body_of_water.bridges, Harpers Ferry Bridge
Arlington County, location.location.people_born_here, Kaiulani Lee
Arlington County, location.statistical_region.population, g.1jmcbfy84
Arlington County, location.location.geolocation, m.0kjhxd
Potomac River, location.location.contains, Cobb Point Bar Light
Arlington County, location.statistical_region.population, g.11x1mc2r1
Arlington County, location.statistical_region.population, g.1jmcbhr49
Arlington County, location.place_with_neighborhoods.neighborhoods, Long Branch Creek
Potomac River, location.location.containedby, North America
Arlington County, location.location.people_born_here, Mark D. Sickles
Arlington County, location.location.people_born_here, Billy Hayes
Arlington Memorial Bridge, location.location.geolocation, m.06_sg58
Arlington County, periodicals.newspaper_circulation_area.newspapers, Asian Fortune
Arlington County, location.statistical_region.population, m.0hjy4sb
Potomac River, geography.body_of_water.bridges, Arlington Memorial Bridge
Arlington County, location.statistical_region.population, m.0hmldpp
Arlington County, location.statistical_region.population, m.0hjy4mr
Arlington County, location.location.people_born_here, Bob Wallace
Bridges, type.property.reverse_property, Body Of Water Spanned
Arlington Memorial Bridge, base.usnris.nris_listing.significance_level, Local
Potomac River, location.location.contains, Arlington Memorial Bridge
Rivercrest, location.location.containedby, Arlington County
James Parks, people.person.place_of_birth, Arlington County
Brian Blados, people.person.place_of_birth, Arlington County
Arlington County, location.statistical_region.population, m.0hjy4m9
Arlington County, location.statistical_region.population, g.11x1h_z25
James R. Stark, people.person.place_of_birth, Arlington County
m.0wg8pbh, location.partial_containment_relationship.partially_contains, Potomac River
Arlington County, location.statistical_region.population, g.11x1dsr8s
Potomac River, geography.body_of_water.bridges, Bayard Bridge
m.0wg927r, location.partial_containment_relationship.partially_contains, Potomac River
Arlington National Cemetery, location.location.containedby, Virginia
Arlington County, location.location.people_born_here, Scott Sowers
Arlington County, location.location.people_born_here, Ann Downer
Arlington County, location.statistical_region.population, m.066cz38
Fairlington, location.location.containedby, Arlington County
Arlington Memorial Bridge, common.topic.notable_for, g.125bpmqxx
Arlington County, location.location.people_born_here, Roger Sands
Dominion Hills, location.location.containedby, Arlington County
Theodore Roosevelt Bridge, transportation.bridge.locale, Arlington County
Body Of Water Spanned, type.property.schema, Bridge
The Washington Post, book.newspaper.circulation_areas, Arlington County
Potomac River, location.location.partially_contained_by, m.0wg8pbh
Arlington Memorial Bridge, common.topic.image, Arlington Memorial Bridge
Arlington County, location.statistical_region.population, g.12b025hfq
Randy Minchew, people.person.place_of_birth, Arlington County
m.0j96pvj, projects.project_participation.project, Construction of Arlington Memorial Bridge
Arlington County, location.location.people_born_here, Harriett Stanley
Arlington Memorial Bridge, transportation.bridge.bridge_type, Arch bridge
Potomac River, geography.body_of_water.bridges, Governor Harry W. Nice Memorial Bridge
Potomac River, location.location.partially_containedby, Washington, D.C.
Arlington County, location.location.events, 2004 Rosbud Film and Video Festival
Potomac River, geography.body_of_water.bridges, Theodore Roosevelt Bridge
Arlington County, common.topic.article, m.0mpc5
Arlington County, location.location.people_born_here, Teo Graca
Arlington County, location.location.people_born_here, Bobby Witt
Arlington County, location.location.containedby, Virginia
Mid-Atlantic states, location.location.contains, Potomac River
Arlington County, location.hud_foreclosure_area.hhuniv, m.07cj1wl
G. D. Falksen, people.person.place_of_birth, Arlington County
Arlington County, location.location.people_born_here, Mary Landrieu
Arlington County, location.location.people_born_here, David Golinkin
Lyon Village, Arlington, Virginia, location.location.containedby, Virginia
Arlington County, location.statistical_region.population, g.12b023snc
Arlington County, location.statistical_region.population, g.12b01tjy7
Potomac River, common.topic.article, m.0g52s
Arlington County, location.location.people_born_here, Mark Smith
Arlington County, travel.travel_destination.how_to_get_here, m.0j71_rm
Arlington Memorial Bridge, transportation.bridge.locale, Arlington County
Arlington County, location.statistical_region.population, g.1jmcbfy83
Arlington, common.topic.notable_types, City/Town/Village
Arlington County, location.statistical_region.population, m.066cz3n
Claremont, location.location.containedby, Arlington County
Body Of Water Spanned, type.property.master_property, Bridges
Arlington County, location.location.people_born_here, Bill Potts
Arlington County, location.location.people_born_here, David M. Brown
Arlington County, location.location.people_born_here, Bruce Gibb
Arlington County, location.location.people_born_here, Bob Asher
Arlington County, travel.travel_destination.local_transportation, Washington Metro
Arlington County, location.statistical_region.rent50_3, m.05ggf8_
Arlington County, location.statistical_region.population, g.11x1mdgc1
Arlington County, location.location.people_born_here, Wes Johnson
Arlington County, location.statistical_region.population, g.11x1kl3bx
Arlington County, location.statistical_region.population, g.12vqhxqfv
Arlington County, location.statistical_region.population, m.0hmldpy
Arlington County, location.statistical_region.population, g.12b01xx8n
Arlington County, travel.travel_destination.tourist_attractions, Artisphere
Dave Leonhard, people.person.place_of_birth, Arlington County
DeStorm Power, people.person.place_of_birth, Arlington County
Arlington County, location.location.people_born_here, Joey Thieman
Arlington County, base.biblioness.bibs_topic.subsumes, Arlington Va
Arlington County, location.location.people_born_here, Zach Cregger
Katie Couric, people.person.place_of_birth, Arlington County
Woodrow Wilson Bridge, transportation.bridge.body_of_water_spanned, Potomac River
Arlington County, travel.travel_destination.tourist_attractions, Arlington House, The Robert E. Lee Memorial
Arlington County, location.location.people_born_here, Tom Dolan
Arlington County, location.statistical_region.population, m.0hjy4s2
Potomac River, location.location.contains, Point Lookout Light
Arlington House, The Robert E. Lee Memorial, location.location.containedby, Virginia
Arlington County, location.location.people_born_here, Michael Storm
Hugh F. Rankin, people.person.place_of_birth, Arlington County
Arlington County, location.statistical_region.population, m.066cz24
Arlington County, travel.travel_destination.tourist_attractions, Tomb of the Unknowns
Construction of Arlington Memorial Bridge, location.location.geolocation, m.0131t1yw
Maryland, location.location.partially_contains, Potomac River
Key Bridge, transportation.bridge.body_of_water_spanned, Potomac River
Arlington Heights, location.neighborhood.neighborhood_of, Arlington County
Arlington County, location.statistical_region.population, g.11x1k0502
Zac Hanson, music.artist.origin, Arlington County
Arlington County, location.location.people_born_here, Kathryn Coombs
Rebecca Loebe, people.person.place_of_birth, Arlington County
Potomac River, geography.river.origin, Appalachian Mountains
Sheila Edmondson, people.person.place_of_birth, Arlington County
Arlington County, location.statistical_region.population, m.0hjy4tm
Potomac River, geography.body_of_water.bridges, Chain Bridge
Arlington County, location.location.people_born_here, Hugh F. Rankin
Arlington County, location.statistical_region.population, g.11x1g5cjc
Columbia Heights, location.location.containedby, Arlington County
Arlington County, location.location.people_born_here, Kate Fleming
Potomac River, location.location.contains, Ragged Point Light
Arlington County, location.statistical_region.population, m.0hmldmx
Riverwood, location.location.containedby, Arlington County
Arlington County, location.statistical_region.population, g.11x1gjlqp
Arlington County, location.location.people_born_here, Anna Journey
Arlington County, location.location.people_born_here, Will Yun Lee
Potomac River, location.location.contains, Upper Cedar Point Light
Braverman & Lin, organization.organization.geographic_scope, Arlington Va
Virginia Square, location.location.containedby, Arlington County
Arlington County, location.capital_of_administrative_division.capital_of, m.0jvw1km
Rock Creek, geography.river.mouth, Potomac River
m.04swm2d, location.adjoining_relationship.adjoins, Arlington County
Arlington County, location.statistical_region.population, m.0hmldny
Potomac River, location.location.partially_contained_by, m.0wg927r
Kathryn Coombs, people.person.place_of_birth, Arlington County
Arlington County, base.biblioness.bibs_location.state, Virginia
Mark D. Sickles, people.person.place_of_birth, Arlington County
Arlington County, location.location.containedby, United States of America
Arlington County, location.statistical_region.population, g.11x1cdqnh
Arlington County, location.statistical_region.population, m.066cz3v
Washington, D.C., location.location.partially_contains, Potomac River
m.0j71_rm, travel.transportation.travel_destination, Arlington County
Arlington County, location.location.people_born_here, Bradley Heithold
Arlington Memorial Bridge, transportation.bridge.body_of_water_spanned, Potomac River
Arlington County, location.hud_foreclosure_area.ofheo_price_change, m.07cj1y1
Arlington Memorial Bridge, transportation.bridge.locale, Washington, D.C.
Arlington County, location.statistical_region.population, g.11x1j4_17
Arlington County, location.location.time_zones, UTC−05:00
Arlington County, location.location.people_born_here, William Lamson
Arlington County, location.location.people_born_here, Susie Bright
Carl Tanner, music.artist.origin, Arlington County
Arlington County, location.statistical_region.co2_emissions_mobile, m.045l1xm
Asian Fortune, book.newspaper.circulation_areas, Arlington County
Greg Garcia, people.person.place_of_birth, Arlington County
Potomac River, common.topic.notable_for, g.1259plgx_
Arlington County, location.location.people_born_here, Anthony Wanzer
Potomac River, location.location.partially_contained_by, m.0wg8n_9
Mary Landrieu, people.person.place_of_birth, Arlington County
Arlington County, location.location.people_born_here, Alisa Harvey
Arlington County, location.statistical_region.population, g.11x1jxhtw
Arlington County, location.statistical_region.population, g.11x1jt9z8
Potomac River, location.location.contains, Maryland Point Light
Arlington County, location.location.people_born_here, Sheila Edmondson
Arlington County, location.place_with_neighborhoods.neighborhoods, Riverwood
Arlington County, location.location.people_born_here, Emily Peachey
Arlington County, location.location.people_born_here, Horace Chalstrom
Construction of Arlington Memorial Bridge, architecture.structure.architectural_style, Neoclassical architecture
Arlington County, location.statistical_region.population, m.066cz32
McKim, Mead & White, architecture.architecture_firm.projects, Arlington Memorial Bridge
Theodore Roosevelt Bridge, transportation.bridge.body_of_water_spanned, Potomac River
Potomac River, base.ontologies.ontology_instance.equivalent_instances, m.07nh392
Arlington County, location.place_with_neighborhoods.neighborhoods, Arlington View
Arlington County, location.place_with_neighborhoods.neighborhoods, Chain Bridge Forest
Arlington County, location.statistical_region.population, g.11x1k58zj
Arlington County, location.statistical_region.co2_emissions_total, m.045hd_j
Potomac River, location.location.contains, Construction of Arlington Memorial Bridge
Arlington County, location.statistical_region.population, g.11x1ds829
Arlington County, travel.travel_destination.tourist_attractions, Arlington Arts Center
Arlington, location.location.containedby, Virginia
Arlington County, location.statistical_region.population, g.12b01lr3q
Potomac River, location.location.partially_containedby, Maryland
Arlington County, location.statistical_region.population, m.0hmldp5
Clarendon, location.location.containedby, Arlington County
Emily Peachey, people.person.place_of_birth, Arlington County
Arlington Memorial Bridge, architecture.structure.architectural_style, Neoclassical architecture
Arlington County, location.statistical_region.population, g.11x1htlnp
Arlington County, location.statistical_region.population, m.066cz2b
Arlington County, location.location.people_born_here, Greg Garcia
Arlington County, location.statistical_region.population, m.0hmldnn
Arlington County, location.statistical_region.population, m.0hjy4rl
Harriett Stanley, people.person.place_of_birth, Arlington County
m.0j96pvb, projects.project_participation.project, Construction of Arlington Memorial Bridge
m.07nh392, base.ontologies.ontology_instance_mapping.freebase_topic, Potomac River
Arlington County, location.place_with_neighborhoods.neighborhoods, Rock Spring
Arlington County, location.statistical_region.population, g.11x1dg68n
Arlington County, location.location.people_born_here, Tom Kiernan
Arlington County, location.statistical_region.population, m.0hjy4sl
Arlington County, location.location.people_born_here, Yousef Abu-Taleb
m.0j96pv3, projects.project_participation.project, Construction of Arlington Memorial Bridge
Arlington Memorial Bridge, projects.project_focus.projects, Construction of Arlington Memorial Bridge
Arlington County, location.location.events, 2012 Nebula Awards
Arlington County, travel.travel_destination.tourist_attractions, Arlington National Cemetery
Arlington County, location.location.people_born_here, John Franklyn Mars
A Few Good Men, film.film.featured_film_locations, Arlington Memorial Bridge
Arlington County, location.us_county.county_seat, Arlington County
Zac Hanson, people.person.place_of_birth, Arlington County
Scott Sowers, people.person.place_of_birth, Arlington County
Potomac River, location.location.partially_containedby, Virginia
Arlington County, location.statistical_region.population, g.11x1fsmwx
Arlington Memorial Bridge, architecture.structure.architecture_firm, McKim, Mead & White
Arlington Memorial Bridge, common.image.size, m.02d72hr
Zach Cregger, people.person.place_of_birth, Arlington County
Arlington County, location.statistical_region.population, m.0hjy4rv
Buckingham, location.location.containedby, Arlington County
Arlington County, base.biblioness.bibs_location.country, United States of America
Arlington Memorial Bridge, location.location.containedby, Potomac River
Arlington County, location.statistical_region.rent50_2, m.05ggf8s
Lucian Restivo, people.person.place_of_birth, Arlington County
Arlington Memorial Bridge, common.image.size, m.04scb4h
Arlington Memorial Bridge, common.image.size, m.03tb1h0
Arlington County, location.statistical_region.co2_emissions_commercial, m.045j9k8
Bridge, common.topic.article, m.03bqfkm
Arlington County, location.location.people_born_here, Randy Kovitz
Pentagon Memorial, travel.tourist_attraction.near_travel_destination, Arlington County
m.0wg9d6x, location.partial_containment_relationship.partially_contains, Potomac River
Potomac River, common.topic.notable_types, River
Arlington County, location.location.people_born_here, Rich Sauveur
Construction of Arlington Memorial Bridge, projects.project.participants, m.0j96pvb
Arlington County, location.location.people_born_here, Nidal Malik Hasan
Arlington County, location.location.people_born_here, G. D. Falksen
Arlington County, location.location.events, Battle of Arlington Mills
Horace Chalstrom, people.person.place_of_birth, Arlington County
Arlington County, location.statistical_region.population, m.0hmldq5
Rivercrest, location.neighborhood.neighborhood_of, Arlington County
Michele J. Sison, people.person.place_of_birth, Arlington County
Battle of Arlington Mills, time.event.locations, Arlington County
Mark Linkous, people.person.place_of_birth, Arlington County
Arlington Memorial Bridge, common.topic.notable_types, Bridge
Arlington County, location.location.people_born_here, George McQuinn
Arlington County, location.location.people_born_here, Sherryl Woods
Arlington Memorial Bridge, transportation.bridge.bridge_type, Bascule bridge
Arlington County, location.statistical_region.population, g.11x1hg3zm
Potomac River, location.location.partially_contained_by, m.0wg9d6x
Arlington County, location.statistical_region.population, m.0hmldn4
Construction of Arlington Memorial Bridge, projects.project.participants, m.0j96pv3
Arlington County, location.statistical_region.population, m.0jtpm2s
Arlington County, location.statistical_region.population, m.066cz40
Arlington County, location.location.people_born_here, Brian Blados
Arlington County, location.statistical_region.population, g.12b028xpv
Arlington County, common.topic.notable_types, US County
Tom Kiernan, people.person.place_of_birth, Arlington County
Northern Virginia, location.location.contains, Arlington County
Potomac River, location.location.containedby, United States of America
Arlington County, location.place_with_neighborhoods.neighborhoods, Arlington Heights
Arlington County, location.location.people_born_here, Selena Fox
m.05hmj6c, protected_sites.natural_or_cultural_site_listing.listed_site, Arlington Memorial Bridge
Arlington National Cemetery, travel.tourist_attraction.near_travel_destination, Arlington County
Arlington County, location.statistical_region.rent50_0, m.05ggf8b
Tom Dolan, people.person.place_of_birth, Arlington County
Bridges, owl#inverseOf, Body Of Water Spanned
Arlington County, location.statistical_region.rent50_1, m.05ggf8k
Arlington County, location.location.people_born_here, Ryan Hall
Great Falls, location.location.containedby, Potomac River
m.0wg8n_9, location.partial_containment_relationship.partially_contains, Potomac River
Arlington Forest, location.neighborhood.neighborhood_of, Arlington County
Alcova Heights, location.location.containedby, Arlington County
George McQuinn, people.person.place_of_birth, Arlington County
Arlington County, location.administrative_division.second_level_division_of, United States of America
Arlington Memorial Bridge, common.topic.article, m.03331j
Arlington County, location.statistical_region.population, g.11x1f22c4
Potomac River, location.location.contains, Mathias Point Light
Arlington County, location.statistical_region.population, m.0hjy4sw
Construction of Arlington Memorial Bridge, common.topic.notable_types, Project
Wes Johnson, people.person.place_of_birth, Arlington County
Arlington County, location.statistical_region.population, g.12b020bl6
Arlington County, location.statistical_region.population, g.11btt6x2qg
Construction of Arlington Memorial Bridge, location.location.containedby, Potomac River
Arlington County, location.statistical_region.population, g.11x1htjvd
Arlington County, location.statistical_region.population, m.0hjy4mz
Arlington County, location.statistical_region.population, m.0hjy4nd
Potomac River, geography.body_of_water.bridges, Key Bridge
Construction of Arlington Memorial Bridge, common.topic.notable_for, g.125gmtqhr
Arlington County, location.statistical_region.population, g.11x1hhxm0
Arlington County, periodicals.newspaper_circulation_area.newspapers, Arlington Connection
Bloomington Viaduct, transportation.bridge.body_of_water_spanned, Potomac River
Arlington Heights, location.location.containedby, Virginia
Arlington County, location.location.people_born_here, Rich Lowry
Arlington County, location.location.people_born_here, Zakiya Randall
Arlington County, location.location.people_born_here, Abram Khan Khattak
Arlington County, location.location.people_born_here, Dave Leonhard
Arlington County, travel.travel_destination.tourist_attractions, Netherlands Carillon
Arlington County, travel.travel_destination.tourist_attractions, Pentagon Memorial
David M. Brown, people.person.place_of_birth, Arlington County
Arlington County, location.statistical_region.population, m.0hjy4nm
Potomac River, geography.river.mouth, Chesapeake Bay
Potomac River, geography.river.mouth, Chesapeake Bay
Arlington County, location.statistical_region.population, m.0hjy4p1
Arlington County, location.location.adjoin_s, m.0h7y9bl
United States of America, location.country.administrative_divisions, Arlington County
Arlington County, location.statistical_region.population, m.0hjy4t4
Arlington County, location.administrative_division.capital, m.0jvw1km
Arlington County, location.statistical_region.population, m.0hmldpf
Joey Thieman, people.person.place_of_birth, Arlington County
Arlington Memorial Bridge, freebase.valuenotation.has_value, Structural Height
Arlington Memorial Bridge, protected_sites.listed_site.designation_as_natural_or_cultural_site, m.05hmj6c
Arlington County, location.statistical_region.population, g.11x1htjvc
Arlington County, location.location.people_born_here, Mary Anna Custis Lee
Arlington County, location.location.people_born_here, Maria Wilson
River, freebase.type_profile.published, Published
Arlington County, location.location.people_born_here, Carl Tanner
Arlington County, location.statistical_region.population, g.11x1djk0_
Governor Harry W. Nice Memorial Bridge, transportation.bridge.body_of_water_spanned, Potomac River
Potomac River, location.location.containedby, Mid-Atlantic states
m.0h7y9bl, location.adjoining_relationship.adjoins, Arlington County
Arlington Forest, location.location.containedby, Arlington County
Arlington County, location.statistical_region.population, m.066cz3g
Potomac River, location.location.contains, Potomac Palisades Site
Arlington County, location.statistical_region.population, m.0hjy4nv
Potomac River, geography.body_of_water.bridges, Woodrow Wilson Bridge
Arlington County, location.location.people_born_here, R. Alan King
Arlington County, location.statistical_region.population, g.11x1hzkq8
Arlington County, location.location.people_born_here, Rebecca Loebe
Arlington House, The Robert E. Lee Memorial, base.usnationalparks.us_national_park.state, Virginia
Arlington County, location.location.time_zones, Eastern Time Zone
Arch bridge, common.topic.article, m.01v4m2
Arlington County, location.location.people_born_here, Bill Dailey
Arlington County, location.statistical_region.population, g.11x1d1vzp
Arlington County, location.location.people_born_here, Asher Monroe
Arlington Heights, location.location.containedby, Arlington County
Arlington County, location.statistical_region.population, g.12b01tjy8
Arlington County, location.location.people_born_here, Stephen Maitland
Arlington County, location.administrative_division.country, United States of America
Potomac River, geography.body_of_water.bridges, Aqueduct Bridge
Mark Smith, people.person.place_of_birth, Arlington County
Arlington County, location.statistical_region.population, g.11x1l76yp
Arlington County, location.location.people_born_here, Randy Minchew
Riverwood, location.neighborhood.neighborhood_of, Arlington County
West Virginia, location.location.partially_contains, Potomac River
Arlington County, location.statistical_region.population, g.11x1cdqng
Arlington County, location.statistical_region.population, g.11x1ksybj
Bill Dailey, people.person.place_of_birth, Arlington County
Arlington County, location.statistical_region.population, g.11x1fhdmn
Arlington County, location.location.people_born_here, Robert Alexander
Arlington County, location.place_with_neighborhoods.neighborhoods, Old Dominion
Arlington County, location.location.people_born_here, James R. Stark
Arlington County, location.location.people_born_here, Zac Hanson
Arlington County, location.statistical_region.population, g.1jmcbhfnb
Roger Sands, people.person.place_of_birth, Arlington County
Potomac River, location.location.partially_containedby, West Virginia
Potomac River, geography.river.cities, Harpers Ferry
Potomac River, geography.body_of_water.bridges, American Legion Memorial Bridge
Arlington County, location.location.people_born_here, Spencer Pumpelly
Arlington County, location.statistical_region.population, g.11x1cy969
Arlington County, location.location.adjoin_s, m.0h7y9bd
Arlington County, location.statistical_region.population, g.12b01lr3r
Arlington County, common.topic.notable_for, g.125bnrwgy
Virginia, location.location.partially_contains, Potomac River
Arlington County, location.location.people_born_here, Johnny Monis
Arlington County, location.location.people_born_here, Bob Malloy
Arlington County, periodicals.newspaper_circulation_area.newspapers, The Washington Post
Arlington County, location.place_with_neighborhoods.neighborhoods, Rivercrest
Potomac River, geography.river.origin, Fairfax Stone Historical Monument State Park
Arlington County, location.location.people_born_here, Mike Holtz
Anthony Wanzer, people.person.place_of_birth, Arlington County
Arlington County, symbols.namesake.named_after, Henry Bennet, 1st Earl of Arlington
Penrose, location.location.containedby, Arlington County
Arlington National Cemetery, location.location.containedby, Arlington County
Randy Kovitz, people.person.place_of_birth, Arlington County
Arlington County, location.location.people_born_here, Armando Romero
Westover, location.location.containedby, Arlington County
Arlington County, location.statistical_region.population, g.11x1c_yhd
Bridge, type.type.properties, Body Of Water Spanned
Rosslyn, location.location.containedby, Arlington County
Arlington House, The Robert E. Lee Memorial, travel.tourist_attraction.near_travel_destination, Arlington County
Arlington County, location.statistical_region.population, m.0hjy4td
Arlington County, location.location.people_born_here, Rachael Yamagata
Arlington County, location.location.events, September 11 attacks
Potomac River, geography.body_of_water.bridges, Bloomington Viaduct
Arlington County, periodicals.newspaper_circulation_area.newspapers, Arlington Sun Gazette
Arlington County, location.location.people_born_here, Adam Curry
Arlington County, location.location.containedby, Northern Virginia
Arlington County, location.statistical_region.population, g.11b66krpl_
Arlington County, location.location.people_born_here, Katie Couric
Arlington County, location.location.people_born_here, Steve Negrete
Arlington County, location.statistical_region.co2_emissions_industrial, m.045knj7
Potomac River, location.location.contains, Great Falls
Arlington Memorial Bridge, freebase.valuenotation.has_value, Clearance Below

Answer: Chesapeake Bay