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: Where does the body of water under Kineshma Bridge originate? 
Knowledge Triplets: River, freebase.type_profile.strict_included_types, Location
Structure, freebase.type_hints.included_types, Location
Bridges, owl#inverseOf, Body Of Water Spanned
Volga River, geography.river.origin, Valdai Hills
Kineshma Bridge, common.topic.article, m.0fp_w3z
Structure, freebase.type_profile.published, Published
Brige in Kineshma, common.image.appears_in_topic_gallery, Kineshma Bridge
Structure, freebase.type_hints.included_types, Topic
Volga River, geography.river.cities, Volgograd
Nizhny Novgorod, location.location.containedby, Russia
Volga River, geography.river.cities, Saratov
Europe, location.location.partially_contains, Russia
Volga River, common.topic.image, Volga in Yaroslavl (autumn morning)
Total Length, rdf-schema#domain, Bridge
Bridge, freebase.type_hints.included_types, Structure
Volga River, common.topic.notable_types, River
Bridge, freebase.type_hints.included_types, Location
Volga River, location.location.containedby, Russia
Volga River, geography.body_of_water.bridges, Kineshma Bridge
River, freebase.type_profile.published, Published
Volga River, location.location.containedby, Europe
Volga River, common.topic.article, m.0h2j5
Volga River, base.schemastaging.context_name.pronunciation, g.125_l9bz5
Kineshma Bridge, common.topic.image, Brige in Kineshma
Locale, rdf-schema#range, Location
Volga River, geography.body_of_water.bridges, Saratov Bridge
Bridge Type, type.property.schema, Bridge
Structure, freebase.type_profile.strict_included_types, Topic
m.07nh6v1, base.ontologies.ontology_instance_mapping.freebase_topic, Volga River
Bridge, freebase.type_profile.strict_included_types, Topic
Bridge, type.type.properties, Clearance Below
Bridge, freebase.type_profile.published, Published
Volga River, geography.river.cities, Kazan
Bridge, type.type.properties, Number of spans
Russia, base.locations.countries.continent, Europe
River, freebase.type_hints.included_types, Topic
Volga River, geography.river.basin_countries, Russia
Saratov, location.location.containedby, Russia
Bridge, freebase.type_profile.kind, Definition
Bridge, type.type.properties, Body Of Water Spanned
Kineshma Bridge, transportation.bridge.body_of_water_spanned, Volga River
Body Of Water Spanned, rdf-schema#domain, Bridge
River, freebase.type_profile.equivalent_topic, River
Body Of Water Spanned, type.property.master_property, Bridges
Locale, type.property.schema, Bridge
Brige in Kineshma, common.image.size, m.022pw9_
Bridge Type, owl#inverseOf, Bridges of this type
Bridge, freebase.type_profile.strict_included_types, Structure
Astrakhan, location.location.containedby, Russia
Valdai Hills, location.location.containedby, Russia
Structure, freebase.type_profile.strict_included_types, Location
Volga River, common.topic.notable_for, g.12582sjth
Volga River, geography.river.cities, Nizhny Novgorod
Caspian Sea, location.location.partially_containedby, Russia
Clearance Below, rdf-schema#domain, Bridge
Bridges, type.property.reverse_property, Body Of Water Spanned
Kazan, location.location.containedby, Russia
Locale, rdf-schema#domain, Bridge
Volga River, common.topic.image, none The Volga at Ulyanovsk
Saratov Bridge, common.topic.notable_types, Bridge
Bridge, freebase.type_profile.equivalent_topic, Bridge
Bridge, freebase.type_profile.strict_included_types, Location
Europe, base.locations.continents.countries_within, Russia
Location, freebase.type_profile.published, Published
Total Length, type.property.schema, Bridge
Bridge, type.type.properties, Longest Span
Bridge, freebase.type_hints.included_types, Topic
Bridge, type.type.properties, Locale
Volga River, geography.river.cities, Astrakhan
Volga River, location.location.events, Syzran–Samara Operation
Volga River, base.ontologies.ontology_instance.equivalent_instances, m.07nh6v1
Bridge, type.type.expected_by, Bridges
Volga River, geography.river.origin, Valdai Hills
Volga River, geography.body_of_water.bridges, g.1235qp6z
Topic, freebase.type_profile.published, Published
Kineshma Bridge, location.location.geolocation, m.0wmwf2s
Bridge, type.type.properties, Width
Bridges, rdf-schema#range, Bridge
Bridge, type.type.properties, Bridge Type
River, freebase.type_profile.strict_included_types, Topic
Locale, type.property.expected_type, Location
Kineshma Bridge, transportation.bridge.body_of_water_spanned, Volga River
River, freebase.type_profile.kind, Definition
Saratov Bridge, transportation.bridge.body_of_water_spanned, Volga River
Bridge Type, type.property.reverse_property, Bridges of this type
Clearance Below, type.property.schema, Bridge
Bridge, type.type.properties, Total Length
Location, freebase.type_hints.included_types, Topic
Russia, location.location.partially_containedby, Europe
Bridge Type, rdf-schema#domain, Bridge
Caspian Sea, geography.lake.inflow, Volga River
Bridge, common.topic.article, m.03bqfkm
Saratov Bridge, location.location.containedby, Russia
River, freebase.type_hints.included_types, Location
Volgograd, location.location.containedby, Russia
Volga River, geography.river.mouth, Caspian Sea
Bridges, type.property.expected_type, Bridge
Bridge, type.type.domain, Transportation
Kineshma Bridge, common.topic.notable_for, g.1255nt13z
Bridge, type.type.expected_by, Bridges of this type
Russia, location.location.partially_contains, Caspian Sea
Caspian Sea, geography.lake.basin_countries, Russia
Kineshma Bridge, common.topic.notable_types, Bridge
Volga River, geography.geographical_feature.category, River
River, freebase.equivalent_topic.equivalent_type, River
Body Of Water Spanned, type.property.schema, Bridge

Answer: Valdai Hills