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: On which river is the city that hosted the 1900 summer olympics located on? 
Knowledge Triplets: Spain, olympics.olympic_participating_country.olympics_participated_in, 1900 Summer Olympics
Basque pelota, olympics.olympic_sport.olympic_games_contested, 1900 Summer Olympics
1900 Summer Olympics, time.event.includes_event, Swimming at the 1900 Summer Olympics
Vélodrome de Vincennes, location.location.events, Football at the 1900 Summer Olympics
Athletics at the 1900 Summer Olympics – Men's shot put, time.event.locations, Bois de Boulogne
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's 2500 metres steeplechase
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's standing triple jump
Seine, location.location.events, Swimming at the 1900 Summer Olympics – Men's 200 metre backstroke
Archery at the 1900 Summer Olympics – Sur la Perche à la Herse, common.topic.notable_for, g.125dsx3k1
Swimming at the 1900 Summer Olympics – Men's 1000 metre freestyle, location.location.events, Seine
1900 Summer Olympics, olympics.olympic_games.host_city, Paris
Seine, location.location.events, Rowing at the 1900 Summer Olympics – Men's eight
Rowing at the 1900 Summer Olympics – Men's coxed pair, time.event.locations, Seine
1900 Summer Olympics, olympics.olympic_games.events, Men's Au chapelet 33m
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's 400 metres
Paris, olympics.olympic_host_city.olympics_hosted, 1900 Summer Olympics
Switzerland, olympics.olympic_participating_country.olympics_participated_in, 1900 Summer Olympics
1900 Summer Olympics, olympics.olympic_games.sports, Basque pelota
1900 Summer Olympics, olympics.olympic_games.participating_countries, Mexico
1900 Summer Olympics, olympics.olympic_games.competitions, Archery at the 1900 Summer Olympics – Au Chapelet 33 metres
Vélodrome de Vincennes, olympics.olympic_venue.olympic_events_contested_here, Cycling at the 1900 Summer Olympics – Men's 25 kilometres
1900 Summer Olympics, olympics.olympic_games.competitions, Rowing at the 1900 Summer Olympics – Men's coxed four
Swimming at the 1900 Summer Olympics – Men's 200 metre team swimming, time.event.locations, Seine
1900 Summer Olympics, olympics.olympic_games.events, Men's Sur la perche á la herse
Vélodrome de Vincennes, olympics.olympic_venue.olympic_events_contested_here, Cricket at the 1900 Summer Olympics
1900 Summer Olympics, common.topic.image, Games of the II Olympiad
Athletics at the 1900 Summer Olympics – Men's 400 metres hurdles, time.event.locations, Bois de Boulogne
Australia, olympics.olympic_participating_country.olympics_participated_in, 1900 Summer Olympics
Athletics at the 1900 Summer Olympics – Men's standing high jump, time.event.locations, Bois de Boulogne
Angling at the 1900 Summer Olympics, common.topic.notable_for, g.12594tj2f
Swimming at the 1900 Summer Olympics – Men's 4000 metre freestyle, time.event.locations, Seine
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's triple jump
Athletics at the 1900 Summer Olympics – Men's 200 metres, time.event.locations, Bois de Boulogne
Compiègne, location.location.events, Golf at the 1900 Summer Olympics – Women's individual
Denmark, olympics.olympic_participating_country.olympics_participated_in, 1900 Summer Olympics
Golf at the 1900 Summer Olympics – Men's individual, time.event.locations, Compiègne
1900 Summer Olympics, olympics.olympic_games.participating_countries, Austria
1900 Summer Olympics, olympics.olympic_games.athletes, m.010hdk08
1900 Summer Olympics, olympics.olympic_participating_country.olympics_participated_in, France
Rowing at the 1900 Summer Olympics – Men's eight, location.location.events, Seine
Basque pelota at the 1900 Summer Olympics - Two-man teams, common.topic.notable_types, Olympic event competition
Swimming at the 1900 Summer Olympics, common.topic.article, m.01hc8j
Archery at the 1900 Summer Olympics – Sur la Perche à la Pyramide, olympics.olympic_event_competition.olympic_games_contested, 1900 Summer Olympics
Cricket at the 1900 Summer Olympics, time.event.locations, Vélodrome de Vincennes
1900 Summer Olympics, olympics.olympic_games.competitions, Swimming at the 1900 Summer Olympics – Men's 4000 metre freestyle
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's hammer throw
Belgium, geography.river.basin_countries, Seine
Jeu de paume, olympics.olympic_sport.games_contested_as_demonstration, 1900 Summer Olympics
Athletics at the 1900 Summer Olympics – Men's triple jump, time.event.locations, Bois de Boulogne
1900 Summer Olympics, olympics.olympic_event_competition.olympic_games_contested, Swimming at the 1900 Summer Olympics – Men's 200 metre team swimming
Seine, location.location.events, Swimming at the 1900 Summer Olympics – Men's 200 metre team swimming
Cycling at the 1900 Summer Olympics – Men's 25 kilometres, time.event.locations, Vélodrome de Vincennes
1900 Summer Olympics, olympics.olympic_games.host_city, Paris
Norway, olympics.olympic_participating_country.olympics_participated_in, 1900 Summer Olympics
Seine, location.location.events, Swimming at the 1900 Summer Olympics – Men's 200 metre obstacle event
1900 Summer Olympics, olympics.olympic_games.participating_countries, Argentina
1900 Summer Olympics, olympics.olympic_games.participating_countries, Canada
1900 Summer Olympics, olympics.olympic_games.demonstration_sports, Boules
1900 Summer Olympics, olympics.olympic_games.competitions, Archery at the 1900 Summer Olympics – Au Cordon Doré 33 metres
Men's Sur la perche á la herse, olympics.olympic_event.competitions, Archery at the 1900 Summer Olympics – Sur la Perche à la Herse
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's 1500 metres
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's standing long jump
1900 Summer Olympics, olympics.olympic_games.participating_countries, Greece
Swimming at the 1900 Summer Olympics – Men's 4000 metre freestyle, time.event.locations, Seine
Swimming at the 1900 Summer Olympics – Men's underwater swimming, location.location.events, Seine
1900 Summer Olympics, olympics.olympic_games.venues, Vélodrome de Vincennes
1900 Summer Olympics, olympics.olympic_games.events, Men's Obstacle Race
1900 Summer Olympics, olympics.olympic_games.participating_countries, Norway
1900 Summer Olympics, olympics.olympic_games.competitions, Archery at the 1900 Summer Olympics – Sur la Perche à la Pyramide
Archery at the 1900 Summer Olympics – Sur la Perche à la Herse, olympics.olympic_event_competition.olympic_games_contested, 1900 Summer Olympics
1900 Summer Olympics, olympics.olympic_games.competitions, Swimming at the 1900 Summer Olympics – Men's 200 metre obstacle event
Athletics at the 1900 Summer Olympics – Men's standing long jump, time.event.locations, Bois de Boulogne
Angling at the 1900 Summer Olympics, common.topic.article, m.02psk98
Vélodrome de Vincennes, location.location.events, Cycling at the 1900 Summer Olympics – Men's sprint
1900 Summer Olympics, olympics.olympic_games.athletes, m.0_qwrdy
1900 Summer Olympics, olympics.olympic_games.demonstration_sports, Longue paume
Swimming at the 1900 Summer Olympics, common.topic.image, Swimming
Sailing at the 1900 Summer Olympics – 10 to 20 ton, time.event.locations, Le Havre
Vélodrome de Vincennes, location.location.events, Cricket at the 1900 Summer Olympics
Seine, location.location.events, Swimming at the 1900 Summer Olympics – Men's 4000 metre freestyle
Athletics at the 1900 Summer Olympics – Men's 5000 metres team race, time.event.locations, Bois de Boulogne
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's 800 metres
Athletics at the 1900 Summer Olympics – Men's 2500 metres steeplechase, time.event.locations, Bois de Boulogne
Compiègne, location.location.events, Golf at the 1900 Summer Olympics – Men's individual
1900 Summer Olympics, olympics.olympic_games.participating_countries, Belgium
Athletics at the 1900 Summer Olympics – Men's 100 metres, time.event.locations, Bois de Boulogne
Rowing at the 1900 Summer Olympics - Men's Single Sculls, time.event.locations, Seine
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's shot put
Mexico, olympics.olympic_participating_country.olympics_participated_in, 1900 Summer Olympics
1900 Summer Olympics, olympics.olympic_games.competitions, Archery at the 1900 Summer Olympics – Sur la Perche à la Herse
1900 Summer Olympics, olympics.olympic_games.participating_countries, Denmark
1900 Summer Olympics, olympics.olympic_event_competition.olympic_games_contested, Swimming at the 1900 Summer Olympics – Men's underwater swimming
Archery at the 1900 Summer Olympics – Sur la Perche à la Herse, olympics.olympic_event_competition.medalists, m.07nncsc
Athletics at the 1900 Summer Olympics – Men's discus throw, time.event.locations, Bois de Boulogne
1900 Summer Olympics, olympics.olympic_event_competition.olympic_games_contested, Rowing at the 1900 Summer Olympics – Men's coxed pair
Romania, olympics.olympic_participating_country.olympics_participated_in, 1900 Summer Olympics
1900 Summer Olympics, olympics.olympic_games.participating_countries, Spain
Archery at the 1900 Summer Olympics – Sur la Perche à la Herse, olympics.olympic_event_competition.event, Men's Sur la perche á la herse
Cycling at the 1900 Summer Olympics – Men's sprint, olympics.olympic_event_competition.venue, Vélodrome de Vincennes
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's 60 metres
Rowing at the 1900 Summer Olympics – Men's eight, time.event.locations, Seine
1900 Summer Olympics, time.event.locations, Paris
Sweden, olympics.olympic_participating_country.olympics_participated_in, 1900 Summer Olympics
Athletics at the 1900 Summer Olympics – Men's 800 metres, time.event.locations, Bois de Boulogne
Le Havre, location.location.events, Sailing at the 1900 Summer Olympics – 10 to 20 ton
Vélodrome de Vincennes, olympics.olympic_venue.olympic_games_used_in, 1900 Summer Olympics
Rowing at the 1900 Summer Olympics – Men's coxed pair, time.event.locations, Seine
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's high jump
m.07nndqs, olympics.olympic_medal_honor.event, Archery at the 1900 Summer Olympics – Sur la Perche à la Pyramide
Golf at the 1900 Summer Olympics, time.event.locations, Paris
Athletics at the 1900 Summer Olympics – Men's standing triple jump, time.event.locations, Bois de Boulogne
Rowing at the 1900 Summer Olympics – Men's coxed four, location.location.events, Seine
Archery at the 1900 Summer Olympics – Sur la Perche à la Herse, olympics.olympic_event_competition.medalists, m.07ntj7t
Archery at the 1900 Summer Olympics – Sur la Perche à la Pyramide, common.topic.notable_for, g.12550b9_4
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's discus throw
India, olympics.olympic_participating_country.olympics_participated_in, 1900 Summer Olympics
1900 Summer Olympics, olympics.olympic_games.competitions, Cricket at the 1900 Summer Olympics
m.07ntj7t, olympics.olympic_medal_honor.event, Archery at the 1900 Summer Olympics – Sur la Perche à la Herse
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's 400 metres hurdles
Swimming at the 1900 Summer Olympics – Men's 200 metre freestyle, time.event.locations, Seine
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's 200 metres hurdles
Cricket at the 1900 Summer Olympics, olympics.olympic_event_competition.venue, Vélodrome de Vincennes
1900 Summer Olympics, olympics.olympic_games.participating_countries, Cuba
Archery at the 1900 Summer Olympics – Sur la Perche à la Pyramide, olympics.olympic_event_competition.medalists, m.07nndqs
Kingdom of Bohemia, olympics.olympic_participating_country.olympics_participated_in, 1900 Summer Olympics
Athletics at the 1900 Summer Olympics – Men's long jump, time.event.locations, Bois de Boulogne
Seine, location.location.events, Swimming at the 1900 Summer Olympics – Men's 1000 metre freestyle
Seine, location.location.events, Rowing at the 1900 Summer Olympics - Men's Single Sculls
Athletics at the 1900 Summer Olympics – Men's pole vault, time.event.locations, Bois de Boulogne
Sailing at the 1900 Summer Olympics – 3 to 10 ton, time.event.locations, Meulan-en-Yvelines
Cycling at the 1900 Summer Olympics – Men's 25 kilometres, olympics.olympic_event_competition.venue, Vélodrome de Vincennes
1900 Summer Olympics, olympics.olympic_games.events, Men's Sur la perche á la pyramide
1900 Summer Olympics, olympics.olympic_games.participating_countries, Sweden
Netherlands, olympics.olympic_participating_country.olympics_participated_in, 1900 Summer Olympics
1900 Summer Olympics, olympics.olympic_games.participating_countries, Kingdom of Bohemia
Swimming at the 1900 Summer Olympics – Men's 1000 metre freestyle, time.event.locations, Seine
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's pole vault
River, common.topic.notable_types, Seine
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's 110 metres hurdles
1900 Summer Olympics, olympics.olympic_games.competitions, Swimming at the 1900 Summer Olympics – Men's 200 metre obstacle event
1900 Summer Olympics, olympics.olympic_games.competitions, Swimming at the 1900 Summer Olympics – Men's 200 metre backstroke
1900 Summer Olympics, olympics.olympic_games.participating_countries, Russian Empire
Archery at the 1900 Summer Olympics – Sur la Perche à la Pyramide, olympics.olympic_event_competition.medalists, m.07ntj89
1900 Summer Olympics, olympics.olympic_games.participating_countries, United Kingdom
1900 Summer Olympics, olympics.olympic_games.competitions, Basque pelota at the 1900 Summer Olympics - Two-man teams
Swimming at the 1900 Summer Olympics – Men's 200 metre backstroke, time.event.locations, Seine
Sailing at the 1900 Summer Olympics – 0 to .5 ton, time.event.locations, Meulan-en-Yvelines
Swimming at the 1900 Summer Olympics – Men's 200 metre team swimming, location.location.events, Seine
Hungary, olympics.olympic_participating_country.olympics_participated_in, 1900 Summer Olympics
1900 Summer Olympics, olympics.olympic_games.events, Men's Au chapelet 50m
Athletics at the 1900 Summer Olympics – Men's marathon, time.event.locations, Paris
Archery at the 1900 Summer Olympics – Sur la Perche à la Herse, common.topic.notable_types, Olympic event competition
1900 Summer Olympics, olympics.olympic_games.participating_countries, Switzerland
Golf at the 1900 Summer Olympics – Women's individual, time.event.locations, Compiègne
Rowing at the 1900 Summer Olympics – Men's coxed four, time.event.locations, Seine
Athletics at the 1900 Summer Olympics – Men's 1500 metres, time.event.locations, Bois de Boulogne
1900 Summer Olympics, olympics.olympic_games.demonstration_sports, Jeu de paume
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's 5000 metres team race
1900 Summer Olympics, olympics.olympic_games.athletes, m.09cxj15
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's 200 metres
Swimming at the 1900 Summer Olympics – Men's 200 metre obstacle event, location.location.events, Seine
Men's Sur la perche á la pyramide, olympics.olympic_event.competitions, Archery at the 1900 Summer Olympics – Sur la Perche à la Pyramide
Basque pelota at the 1900 Summer Olympics - Two-man teams, common.topic.notable_for, g.125g109dk
1900 Summer Olympics, olympics.olympic_event_competition.olympic_games_contested, Rowing at the 1900 Summer Olympics – Men's eight
Boules, olympics.olympic_sport.games_contested_as_demonstration, 1900 Summer Olympics
Archery at the 1900 Summer Olympics – Sur la Perche à la Herse, olympics.olympic_event_competition.medalists, m.07ntj81
Men's Sur la perche á la pyramide, olympics.olympic_event.olympic_games_contested, 1900 Summer Olympics
1900 Summer Olympics, common.topic.notable_for, g.1257vtrn0
Swimming at the 1900 Summer Olympics – Men's 200 metre obstacle event, time.event.locations, Seine
Seine, location.location.events, Rowing at the 1900 Summer Olympics – Men's coxed four
Archery at the 1900 Summer Olympics – Sur la Perche à la Pyramide, olympics.olympic_event_competition.medalists, m.07nncsn
m.07nncsn, olympics.olympic_medal_honor.event, Archery at the 1900 Summer Olympics – Sur la Perche à la Pyramide
m.07ntj81, olympics.olympic_medal_honor.event, Archery at the 1900 Summer Olympics – Sur la Perche à la Herse
Belgium, olympics.olympic_participating_country.olympics_participated_in, 1900 Summer Olympics
Italy, olympics.olympic_participating_country.olympics_participated_in, 1900 Summer Olympics
Vélodrome de Vincennes, location.location.events, Cycling at the 1900 Summer Olympics – Men's 25 kilometres
Athletics at the 1900 Summer Olympics – Men's 60 metres, time.event.locations, Bois de Boulogne
1900 Summer Olympics, olympics.olympic_games.competitions, Archery at the 1900 Summer Olympics – Au Chapelet 50 metres
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's standing high jump
Cuba, olympics.olympic_participating_country.olympics_participated_in, 1900 Summer Olympics
1900 Summer Olympics, olympics.olympic_games.events, Men's Marathon
Swimming at the 1900 Summer Olympics – Men's underwater swimming, time.event.locations, Seine
Swimming at the 1900 Summer Olympics – Men's 200 metre freestyle, time.event.locations, Seine
1900 Summer Olympics, olympics.olympic_games.participating_countries, United States of America
Cycling at the 1900 Summer Olympics – Men's sprint, time.event.locations, Vélodrome de Vincennes
m.07ntj89, olympics.olympic_medal_honor.event, Archery at the 1900 Summer Olympics – Sur la Perche à la Pyramide
Basque pelota at the 1900 Summer Olympics - Two-man teams, olympics.olympic_event_competition.olympic_games_contested, 1900 Summer Olympics
1900 Summer Olympics, olympics.olympic_games.participating_countries, Italy
Archery at the 1900 Summer Olympics – Sur la Perche à la Herse, common.topic.article, m.02vr087
1900 Summer Olympics, olympics.olympic_games.participating_countries, Germany
Archery at the 1900 Summer Olympics – Sur la Perche à la Pyramide, olympics.olympic_event_competition.event, Men's Sur la perche á la pyramide
France, location.location.containedby, Seine
Longue paume, olympics.olympic_sport.games_contested_as_demonstration, 1900 Summer Olympics
m.07nncsc, olympics.olympic_medal_honor.event, Archery at the 1900 Summer Olympics – Sur la Perche à la Herse
m.07nncwy, olympics.olympic_medal_honor.olympics, 1900 Summer Olympics
Rowing at the 1900 Summer Olympics - Men's Single Sculls, time.event.locations, Seine
Archery at the 1900 Summer Olympics – Au Chapelet 33 metres, olympics.olympic_event_competition.olympic_games_contested, 1900 Summer Olympics
Athletics at the 1900 Summer Olympics – Men's 200 metres hurdles, time.event.locations, Bois de Boulogne
1900 Summer Olympics, olympics.olympic_games.competitions, Swimming at the 1900 Summer Olympics – Men's 1000 metre freestyle
1900 Summer Olympics, olympics.olympic_games.participating_countries, Netherlands
1900 Summer Olympics, olympics.olympic_games.sports, Swimming
Seine, location.location.events, Swimming at the 1900 Summer Olympics – Men's 200 metre freestyle
Paris, location.location.partially_contains, Seine
1900 Summer Olympics, olympics.olympic_participating_country.olympics_participated_in, Belgium
Argentina, olympics.olympic_participating_country.olympics_participated_in, 1900 Summer Olympics
1900 Summer Olympics, olympics.olympic_games.participating_countries, Hungary
1900 Summer Olympics, olympics.olympic_event_competition.olympic_games_contested, Rowing at the 1900 Summer Olympics - Men's Single Sculls
Archery at the 1900 Summer Olympics – Sur la Perche à la Pyramide, common.topic.notable_types, Olympic event competition
Sailing at the 1900 Summer Olympics – .5 to 1 ton, time.event.locations, Meulan-en-Yvelines
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's long jump
Vélodrome de Vincennes, olympics.olympic_venue.olympic_events_contested_here, Cycling at the 1900 Summer Olympics – Men's sprint
Men's Sur la perche á la herse, olympics.olympic_event.olympic_games_contested, 1900 Summer Olympics
Sailing at the 1900 Summer Olympics – 2 to 3 ton, time.event.locations, Meulan-en-Yvelines
Athletics at the 1900 Summer Olympics – Men's 4000 metres steeplechase, time.event.locations, Bois de Boulogne
Athletics at the 1900 Summer Olympics – Men's 400 metres, time.event.locations, Bois de Boulogne
Athletics at the 1900 Summer Olympics – Men's 110 metres hurdles, time.event.locations, Bois de Boulogne
1900 Summer Olympics, olympics.olympic_games.competitions, Archery at the 1900 Summer Olympics – Au Cordon Doré 50 metres
1900 Summer Olympics, olympics.olympic_event_competition.olympic_games_contested, Swimming at the 1900 Summer Olympics – Men's 200 metre freestyle
1900 Summer Olympics, olympics.olympic_games.competitions, Swimming at the 1900 Summer Olympics – Men's underwater swimming
1900 Summer Olympics, olympics.olympic_games.participating_countries, India
1900 Summer Olympics, time.event.includes_event, Pigeon racing at the 1900 Summer Olympics
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's 100 metres
1900 Summer Olympics, olympics.olympic_games.participating_countries, France
Angling at the 1900 Summer Olympics, time.event.included_in_event, 1900 Summer Olympics
Basque pelota at the 1900 Summer Olympics - Two-man teams, common.topic.article, m.02vrmnt
Athletics at the 1900 Summer Olympics, common.topic.article, m.01h82d
Archery at the 1900 Summer Olympics – Sur la Perche à la Pyramide, common.topic.article, m.02vr08y
Sailing at the 1900 Summer Olympics – Open class, time.event.locations, Meulan-en-Yvelines
1900 Summer Olympics, olympics.olympic_games.events, Men's Underwater Swimming
1900 Summer Olympics, olympics.olympic_games.participating_countries, Romania
1900 Summer Olympics, common.topic.article, m.016rb8
Greece, olympics.olympic_participating_country.olympics_participated_in, 1900 Summer Olympics
1900 Summer Olympics, olympics.olympic_games.participating_countries, Australia
Austria, olympics.olympic_participating_country.olympics_participated_in, 1900 Summer Olympics
1900 Summer Olympics, olympics.olympic_games.athletes, m.09cw01t
Sailing at the 1900 Summer Olympics – 1 to 2 ton, time.event.locations, Meulan-en-Yvelines
Seine, location.location.events, Swimming at the 1900 Summer Olympics – Men's underwater swimming
Athletics at the 1900 Summer Olympics – Men's high jump, time.event.locations, Bois de Boulogne
Swimming at the 1900 Summer Olympics – Men's 200 metre backstroke, location.location.events, Seine
1900 Summer Olympics, olympics.olympic_games.sports, Water polo
Bois de Boulogne, location.location.events, Athletics at the 1900 Summer Olympics – Men's 4000 metres steeplechase
1900 Summer Olympics, olympics.olympic_games.athletes, m.04gcwzb
Athletics at the 1900 Summer Olympics – Men's hammer throw, time.event.locations, Bois de Boulogne
Seine, location.location.events, Rowing at the 1900 Summer Olympics – Men's coxed pair

Answer: Seine