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 is the name of the body of water under Ann W Richards Congress Avenue Bridge? 
Knowledge Triplets: Ann Richards, people.person.children, Cecile Richards
Ann Richards, people.person.children, Daniel Richards
78768, common.topic.notable_for, g.1258c008c
Lake Austin, geography.body_of_water.bridges, Pennybacker Bridge
m.0bnjkmp, tv.tv_guest_role.actor, Ann Richards
78772, common.topic.notable_for, g.125by3wrb
m.0bnj6pt, tv.tv_guest_role.actor, Ann Richards
78779, common.topic.notable_for, g.12552ymth
Arch bridge, base.descriptive_names.names.descriptive_name, m.010b8hg5
Bridge, type.type.properties, Width
78748-5051, location.location.containedby, 78748
Ann Richards, people.person.places_lived, m.03prg7d
m.056t803, location.geometry.delineates_location, 78748
m.0btnbh5, tv.tv_guest_role.actor, Ann Richards
78745, common.topic.notable_for, g.125bl_s0b
78701, location.location.contains, Downtown
78727, location.location.geolocation, m.03dy433
78737, location.location.geometry, m.0581k4s
78735, common.topic.notable_for, g.125c79spg
m.03prg7d, people.place_lived.person, Ann Richards
Bridge Type, owl#inverseOf, Bridges of this type
78747, common.topic.notable_for, g.12571n3y9
m.02wnglv, education.education.student, Ann Richards
m.03l7wj9, common.webpage.resource, m.0bjnvq7
Ann W. Richards Congress Avenue Bridge, symbols.namesake.named_after, Ann Richards
78778, common.topic.notable_for, g.125d2mjjq
One Congress Plaza, location.location.containedby, Travis County
78733, location.location.geometry, m.0581kwf
Ann Richards, people.person.places_lived, m.03pdylw
78717, location.location.geometry, m.0576x6c
Arch bridge, common.topic.image, Arch bridge
78701, location.location.contains, Southwest Tower Building
78722, location.location.geometry, m.0590m_c
78703, location.location.geolocation, m.03dy406
m.056t9m3, location.geometry.delineates_location, 78746
Ann Richards, tv.tv_actor.guest_roles, m.0bnjkmp
73344, common.topic.notable_for, g.1257mz2pk
78744, location.location.geolocation, m.03dy45y
Robert Cecil Willis, people.person.children, Ann Richards
Ann Richards, tv.tv_actor.guest_roles, m.0bnj6pt
78764, common.topic.notable_for, g.1258jnp7h
Ann Richards, common.topic.article, m.01v2r9
78701, location.location.contains, One Congress Plaza
78725, common.topic.notable_for, g.1259g2h5d
Bridges, type.property.reverse_property, Body Of Water Spanned
Lady Bird Lake, geography.body_of_water.bridges, Ann W. Richards Congress Avenue Bridge
78754, location.location.geometry, m.058_nbj
Ann W. Richards Congress Avenue Bridge, common.topic.notable_for, g.12560vc8j
78701, location.location.geolocation, m.03dy3_v
m.056t97j, location.geometry.delineates_location, 78747
Bridge, freebase.type_hints.included_types, Topic
m.02wphhd, education.education.student, Ann Richards
Ann Arbor, location.hud_county_place.place, Ann Arbor
Austin, travel.travel_destination.tourist_attractions, Ann W. Richards Congress Avenue Bridge
Ann Arbor, base.biblioness.bibs_location.country, United States of America
78728, location.location.geolocation, m.03dy439
Arch bridge, base.descriptive_names.names.descriptive_name, m.010b8hlm
Lacy Lakeview, Texas, location.location.people_born_here, Ann Richards
m.0cqy90y, common.webpage.topic, Ann Richards
78719, common.topic.notable_for, g.125cr68b4
78754, location.location.geolocation, m.03dy480
78722, common.topic.notable_for, g.125chkg7c
78741, location.location.geometry, m.056t899
Bridge, type.type.expected_by, Bridges
78739, location.location.geolocation, m.03dy45c
78703, location.location.geometry, m.058hc2p
78739, common.topic.notable_for, g.125d_94z4
78745, location.location.geolocation, m.03dy463
78760, common.topic.notable_for, g.125cr6jyw
Bridge, freebase.type_profile.strict_included_types, Topic
Ann Richards, people.person.education, m.0n0dbxq
Arch bridge, base.descriptive_names.names.descriptive_name, m.010b8hgt
78752, location.location.geometry, m.058_n90
Ann Richards, people.person.education, m.02wnglv
The bridge bats have become an integral part of Austin's cultural identity., common.image.appears_in_topic_gallery, Ann W. Richards Congress Avenue Bridge
Bridge, freebase.type_hints.included_types, Structure
Arch bridge, base.descriptive_names.names.descriptive_name, m.010b8hk_
m.0n0dbxq, education.education.student, Ann Richards
Arch bridge, base.descriptive_names.names.descriptive_name, m.010b8hdc
78738, location.location.geolocation, m.03dy455
Cecile Richards, people.person.parents, Ann Richards
Arch bridge, base.schemastaging.context_name.pronunciation, g.125_rf65p
78774, common.topic.notable_for, g.1257pywq_
78732, location.location.geolocation, m.03dy441
78727, location.location.geometry, m.0590m_w
One Congress Plaza, location.location.containedby, Austin
Ann Arbor, common.topic.notable_types, City/Town/Village
m.0581kwf, location.geometry.delineates_location, 78733
Lamar Boulevard Bridge, freebase.valuenotation.has_value, Clearance Below
Bridges, rdf-schema#range, Bridge
Austin, travel.travel_destination.tourist_attractions, Lady Bird Lake
Structure, type.type.properties, Architect
78736, common.topic.notable_for, g.125chk4hs
m.058_n9j, location.geometry.delineates_location, 78750
78725, location.location.geolocation, m.03dy42c
m.0590n13, location.geometry.delineates_location, 78728
78746, location.location.geometry, m.056t9m3
Arch bridge, base.descriptive_names.names.descriptive_name, m.010b8h7y
m.058hcb4, location.geometry.delineates_location, 78702
Ann Richards, people.person.nationality, United States of America
78734, location.location.geometry, m.0581jdm
78759, location.location.contains, Arboretum
Ann Arbor, location.location.containedby, United States of America
78719, location.location.geometry, m.0576xff
Design and Construction of the Ann W. Richards Congress Avenue Bridge, projects.project.project_focus, Ann W. Richards Congress Avenue Bridge
78748, location.location.geolocation, m.03dy46p
78749, location.location.geometry, m.056t7vq
Ann Richards, common.topic.notable_for, g.125cr661p
78745, location.location.geometry, m.056t8sl
78704, location.location.geolocation, m.03dy40d
m.0581jng, location.geometry.delineates_location, 78735
78762, common.topic.notable_for, g.1259stgj2
Bridge, type.type.domain, Transportation
78748, location.location.containedby, Texas
m.0tk9_d4, film.performance.actor, Ann Richards
78748, location.location.containedby, United States of America
Ann W. Richards Congress Avenue Bridge, common.image.size, m.0291tn6
m.052m813, government.government_position_held.appointed_by, Ann Richards
78750, location.location.geometry, m.058_n9j
78749, location.location.geolocation, m.03dy46y
78785, common.topic.notable_for, g.1256w25_p
Arch bridge, location.location.geolocation, m.0_l933b
Texas State Capitol, architecture.structure.architect, Elijah E. Myers
78730, location.location.geometry, m.0581kd7
78717, common.topic.notable_for, g.1256qh_h7
78705, location.location.contains, Raul's
78756, location.location.geometry, m.058_nb0
78747, location.location.geometry, m.056t97j
Bridge, freebase.type_profile.strict_included_types, Location
Bridge, type.type.properties, Clearance Below
Body Of Water Spanned, type.property.master_property, Bridges
78739, location.location.geometry, m.0581j3q
Bridge Type, type.property.schema, Bridge
Bridge, type.type.properties, Number of spans
78718, common.topic.notable_for, g.125b1mrwg
78726, common.topic.notable_for, g.125g6_1t0
m.04bf99w, government.political_party_tenure.politician, Ann Richards
Ann Richards, common.topic.image, Ann Richards
m.0cg5q9t, film.personal_film_appearance.person, Ann Richards
Total Length, type.property.schema, Bridge
Lamar Boulevard Bridge, location.location.containedby, Texas
Arch bridge, base.descriptive_names.names.descriptive_name, m.010b8hf8
78789, common.topic.notable_for, g.1256vgp5z
Ann W. Richards Congress Avenue Bridge, common.topic.article, m.02rlk0c
Ann Richards, symbols.name_source.namesakes, Ann W. Richards Congress Avenue Bridge
Arch bridge, base.descriptive_names.names.descriptive_name, m.010b8hkm
Ann W. Richards Congress Avenue Bridge, geography.body_of_water.bridges, Lady Bird Lake
m.0wkczhd, film.performance.actor, Ann Richards
78759, location.location.geolocation, m.03dy48s
Ann Richards, people.deceased_person.place_of_death, Austin
78731, location.location.geolocation, m.03dy43w
78727, common.topic.notable_for, g.12590c8hh
One Congress Plaza, architecture.structure.architecture_firm, Skidmore, Owings & Merrill
CongressAveBridge-Apr2010, common.image.size, m.0cmp4g5
Total Length, rdf-schema#domain, Bridge
78702, location.location.geometry, m.058hcb4
Locale, type.property.schema, Bridge
78742, common.topic.notable_for, g.125ch25vt
78738, common.topic.notable_for, g.125f25yp8
m.056t8js, location.geometry.delineates_location, 78742
78705, location.location.geometry, m.058hb5r
Bridge, type.type.properties, Body Of Water Spanned
Arch bridge, base.descriptive_names.names.descriptive_name, m.010b8hj2
m.03pdylw, people.place_lived.person, Ann Richards
78701, location.location.contains, One American Center
78748-5051, location.location.containedby, United States of America
78756, common.topic.notable_for, g.1256y27yg
Ann W. Richards Congress Avenue Bridge, projects.project_focus.projects, Design and Construction of the Ann W. Richards Congress Avenue Bridge
78769, common.topic.notable_for, g.12575y5hn
M. Ward, Lou Barlow, Laura Marling, and more help EW take SXSW, common.resource.annotations, m.09wj4r4
Architectural Style, type.property.schema, Structure
78721, location.location.geometry, m.0590m_m
78704, location.location.geometry, m.058hbd5
Lamar Boulevard Bridge, transportation.bridge.body_of_water_spanned, Lady Bird Lake
m.0590n03, location.geometry.delineates_location, 78726
Ann Richards, people.deceased_person.cause_of_death, Laryngeal cancer
78724, location.location.geometry, m.0590n0m
Locale, rdf-schema#domain, Bridge
78754, common.topic.notable_for, g.12565k_nj
m.0p8xt9l, people.marriage.spouse, Ann Richards
One Congress Plaza, location.location.containedby, 78701
78751, common.topic.notable_for, g.12564bmz0
78735, location.location.geolocation, m.03dy44m
Cecile Richards, people.person.gender, Female
m.0590m_w, location.geometry.delineates_location, 78727
Bridges, type.property.expected_type, Bridge
78780, common.topic.notable_for, g.1259mr377
78753, location.location.geolocation, m.03dy47v
m.0590n0w, location.geometry.delineates_location, 78729
78702, common.topic.notable_for, g.12565x1wh
78701, location.location.contains, Esther's Follies
78758, location.location.geometry, m.058_n8j
78715, common.topic.notable_for, g.12559n4_j
78701, location.location.geometry, m.058hbpq
Arch bridge, base.descriptive_names.names.descriptive_name, m.010b8h9j
78732, common.topic.notable_for, g.1259mwn_n
m.052n0kh, common.webpage.resource, Visitor Information
78783, common.topic.notable_for, g.1255t66kh
Cecile Richards, people.person.profession, Politician
Ann Richards, people.person.place_of_birth, Lacy Lakeview, Texas
Lamar Boulevard Bridge, base.usnris.nris_listing.significance_level, Local
Ann Richards, people.person.profession, Politician
78723, location.location.geolocation, m.03dy41y
78717, location.location.geolocation, m.03dy40z
78759, common.topic.notable_for, g.12592bfz4
78773, common.topic.notable_for, g.1255_57wp
Ann W. Richards Congress Avenue Bridge, transportation.bridge.locale, Austin
Ann Richards, government.politician.government_positions_held, m.04ks0ky
CongressAveBridge-Apr2010, common.image.appears_in_topic_gallery, Ann W. Richards Congress Avenue Bridge
78735, location.location.geometry, m.0581jng
Bridge, common.topic.article, m.03bqfkm
78781, common.topic.notable_for, g.125ddkv55
Mildred Iona Warren, people.person.children, Ann Richards
Ann Richards, people.person.children, Clark Richards
78763, common.topic.notable_for, g.1257wfnqn
The Onion, book.newspaper.circulation_areas, Ann Arbor
m.0bjnvq7, common.resource.annotations, m.03l7wj9
73301, common.topic.notable_for, g.1258vx3pt
Lamar Boulevard Bridge, location.location.containedby, Austin
78751, location.location.geometry, m.058_n9s
The bridge bats have become an integral part of Austin's cultural identity., common.image.size, m.029n65p
m.056t899, location.geometry.delineates_location, 78741
78720, common.topic.notable_for, g.12551w4d0
Colorado River, geography.body_of_water.bridges, Pennybacker Bridge
78716, common.topic.notable_for, g.125d6909x
78746, location.location.geolocation, m.03dy469
Bridge, freebase.type_profile.strict_included_types, Structure
Bridge, type.type.expected_by, Bridges of this type
Ann W. Richards Congress Avenue Bridge, freebase.valuenotation.has_value, Clearance Below
78756, location.location.geolocation, m.03dy486
One American Center, location.location.containedby, 78701
Ann Richards, people.person.children, Ellen Richards
78729, location.location.geometry, m.0590n0w
Ann W. Richards Congress Avenue Bridge, common.topic.image, CongressAveBridge-Apr2010
Ann W. Richards Congress Avenue Bridge, common.topic.image, The bridge bats have become an integral part of Austin's cultural identity.
78705, location.location.contains, Gregory Gymnasium
Structure, type.type.properties, Architectural Style
Ann W. Richards Congress Avenue Bridge, travel.tourist_attraction.near_travel_destination, Austin
m.0581jwy, location.geometry.delineates_location, 78736
Ann Richards, people.person.spouse_s, m.0p8xt9l
Ann W. Richards Congress Avenue Bridge, transportation.bridge.body_of_water_spanned, Lady Bird Lake
Cecile Richards, people.person.nationality, United States of America
Bridge, type.type.properties, Total Length
78749, common.topic.notable_for, g.1258vfjbt
78757, location.location.geometry, m.058_nb8
Bridge, freebase.type_profile.equivalent_topic, Bridge
m.040q2hw, common.webpage.resource, m.0blxhtn
78744, location.location.geometry, m.056t8_q
m.056t8sl, location.geometry.delineates_location, 78745
78726, location.location.geolocation, m.03dy42s
m.0576x6c, location.geometry.delineates_location, 78717
78753, location.location.geometry, m.058_n98
78766, common.topic.notable_for, g.125b1mrwf
78748-5051, common.topic.notable_for, g.125d7pgcj
Ann Richards, film.person_or_entity_appearing_in_film.films, m.0p5pwrg
78708, common.topic.notable_for, g.125chwk47
Arch bridge, common.topic.notable_for, g.1254yf67t
Ann Richards, film.actor.film, m.0wkczhd
Bridges, owl#inverseOf, Body Of Water Spanned
78737, common.topic.notable_for, g.125b2_p5b
Design and Construction of the Ann W. Richards Congress Avenue Bridge, common.topic.notable_for, g.1yl5jmzkm
Ann Richards, government.political_appointer.appointees, m.052m813
78725, location.location.geometry, m.0590n0c
78724, common.topic.notable_for, g.1255bd7nv
Ann W. Richards Congress Avenue Bridge, transportation.bridge.bridge_type, Arch bridge
78705, location.location.geolocation, m.03dy40s
Ann Richards, common.topic.webpage, m.0cqy90y
78703, common.topic.notable_for, g.12560vb7n
Visitor Information, common.resource.annotations, m.052n0kh
Lamar Boulevard Bridge, transportation.bridge.bridge_type, Arch bridge
78741, common.topic.notable_for, g.12557t7fj
Bridge Type, rdf-schema#domain, Bridge
Lamar Boulevard Bridge, common.topic.notable_types, Bridge
78705, location.location.contains, Littlefield Fountain
Arch bridge, base.descriptive_names.names.descriptive_name, m.010b8h8c
Red River, film.film.country, United States of America
78714, common.topic.notable_for, g.125c826nz
Bridge, freebase.type_profile.kind, Definition
78750, common.topic.notable_for, g.125f13rzy
78728, location.location.contains, Chaparral Ice
m.04ks0ky, government.government_position_held.office_holder, Ann Richards
78702, location.location.geolocation, m.03dy400
Arch bridge, base.descriptive_names.names.descriptive_name, m.010b8hb0
Bridge, type.type.properties, Bridge Type
78732, location.location.geometry, m.0581kvh
78705, common.topic.notable_for, g.125ghc7r4
78744, common.topic.notable_for, g.12554ft_8
78730, common.topic.notable_for, g.1256t__dy
78712, common.topic.notable_for, g.125cnxpny
78748, location.location.containedby, Austin
Bridge Type, rdf-schema#range, Bridge Type
m.0590n0m, location.geometry.delineates_location, 78724
Ann Richards, common.topic.image, Ann-Richards-STS-40-JSC-visit-1992
Bridge, freebase.type_profile.published, Published
78799, common.topic.notable_for, g.12586ldrh
Ann Richards, people.person.parents, Robert Cecil Willis
Ann Richards, film.person_or_entity_appearing_in_film.films, m.010fnw9v
Bridge Type, type.property.expected_type, Bridge Type
78737, location.location.geolocation, m.03dy44_
Ann Richards, government.politician.party, m.04bf99w
Ann Richards, people.person.gender, Female
Bridge Type, type.property.reverse_property, Bridges of this type
Design and Construction of the Ann W. Richards Congress Avenue Bridge, common.topic.notable_types, Project
m.0581kd7, location.geometry.delineates_location, 78730
78729, location.location.geolocation, m.03dy43h
78724, location.location.geolocation, m.03dy423
Ann Arbor, periodicals.newspaper_circulation_area.newspapers, The Onion
Structure, type.type.properties, Structural Height
One Congress Plaza, location.location.containedby, United States of America
Arch bridge, common.topic.article, m.01v4m2
Clearance Below, type.property.schema, Bridge
Arch bridge, base.descriptive_names.names.descriptive_name, m.010b8hmf
78721, common.topic.notable_for, g.1257_prfs
Ann W. Richards Congress Avenue Bridge, location.location.containedby, Texas
78734, location.location.geolocation, m.03dy44f
78752, location.location.geolocation, m.03dy47n
78765, common.topic.notable_for, g.1258sqjfh
Body Of Water Spanned, type.property.schema, Bridge
78758, common.topic.notable_for, g.1254_dppt
78744, location.location.contains, Pilot Knob
Ann W. Richards Congress Avenue Bridge, common.topic.image, Ann W. Richards Congress Avenue Bridge
78748, common.topic.notable_for, g.1255thz5r
m.0581j3q, location.geometry.delineates_location, 78739
78726, location.location.geometry, m.0590n03
Ann Richards, people.person.parents, Mildred Iona Warren
78709, common.topic.notable_for, g.125gmt5h9
m.0581knd, location.geometry.delineates_location, 78731
78722, location.location.geolocation, m.03dy41r
Lady Bird Lake, geography.body_of_water.bridges, Lamar Boulevard Bridge
78705, location.location.contains, Dobie Center
Ann Richards, freebase.valuenotation.has_no_value, Siblings
Body Of Water Spanned, rdf-schema#domain, Bridge
Texas State Capitol, common.topic.article, m.02j541
78747, location.location.geolocation, m.03dy46h
Lamar Boulevard Bridge, freebase.valuenotation.has_value, Structural Height
78742, location.location.geometry, m.056t8js
78721, location.location.geolocation, m.03dy41k
78711, common.topic.notable_for, g.125ddkv56
78752, common.topic.notable_for, g.1258jn0_5
'Welcome to the Neighborhood' -- and good-bye!, common.resource.annotations, m.09xfv_7
78733, location.location.geolocation, m.03dy447
78757, common.topic.notable_for, g.1256dx1z9
Ann W. Richards Congress Avenue Bridge, freebase.valuenotation.has_value, Structural Height
Ann W. Richards Congress Avenue Bridge, common.image.appears_in_topic_gallery, Ann W. Richards Congress Avenue Bridge
Arch bridge, base.descriptive_names.names.descriptive_name, m.010b8hjq
Ann Richards, people.person.religion, United Methodist Church
Ann W. Richards Congress Avenue Bridge, common.topic.notable_types, Bridge
78748, location.location.geometry, m.056t803
Ann Richards, people.person.education, m.02wphhd
78719, location.location.geolocation, m.03dy416
78751, location.location.geolocation, m.03dy47g
78757, location.location.geolocation, m.03dy48d
m.0581jdm, location.geometry.delineates_location, 78734
Bridge, type.type.properties, Locale
78723, location.location.geometry, m.0590m_3
78731, common.topic.notable_for, g.125b_v6t1
Arch bridge, common.topic.notable_types, Bridge Type
South by Southwest, common.topic.image, AustinSkyline
m.0590n0c, location.geometry.delineates_location, 78725
78729, common.topic.notable_for, g.125ctmqsh
m.058hbd5, location.geometry.delineates_location, 78704
Ann W. Richards Congress Avenue Bridge, location.location.containedby, Austin
m.010fnw9v, film.personal_film_appearance.person, Ann Richards
Bridge, freebase.type_hints.included_types, Location
m.058_n98, location.geometry.delineates_location, 78753
78736, location.location.geometry, m.0581jwy
78746, common.topic.notable_for, g.125bxt57l
78759, location.location.geometry, m.058_n8s
Ann Richards, tv.tv_actor.guest_roles, m.0btnbh5
Architectural Style, rdf-schema#domain, Structure
Ann Richards, film.person_or_entity_appearing_in_film.films, m.0cg5q9t
Clearance Below, rdf-schema#domain, Bridge
78750, location.location.geolocation, m.03dy478
78728, location.location.geometry, m.0590n13
m.0581k4s, location.geometry.delineates_location, 78737
Texas, government.political_district.representatives, m.04j5vd_
78701, location.location.contains, The Austonian
78741, location.location.geolocation, m.03dy45k
78733, common.topic.notable_for, g.125dc4myw
78736, location.location.geolocation, m.03dy44t
78742, location.location.geolocation, m.03dy45r
78734, common.topic.notable_for, g.12577x0f4
78731, location.location.geometry, m.0581knd
Bridge, type.type.properties, Longest Span
Ann Richards, people.person.profession, Teacher
m.0blxhtn, common.resource.annotations, m.040q2hw
m.056t7vq, location.geometry.delineates_location, 78749
78748, location.location.contains, 78748-5051
78701, location.location.contains, Ritz
Ann Richards, common.topic.notable_types, Politician
78730, location.location.geolocation, m.03dy43p
m.0p5pwrg, film.personal_film_appearance.person, Ann Richards
78761, common.topic.notable_for, g.1258314yv
Ann Richards, film.actor.film, m.0tk9_d4
78758, location.location.geolocation, m.03dy48l
78738, location.location.geometry, m.0581hym
78710, common.topic.notable_for, g.1255xlk7s
78728, common.topic.notable_for, g.1256xmm47
Arch bridge, base.descriptive_names.names.descriptive_name, m.010b8hc0
78753, common.topic.notable_for, g.125949mgh
Ann W. Richards Congress Avenue Bridge, location.location.geolocation, m.0wmhyf_

Answer: Lady Bird Lake