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: amtrak rail owns a what locomotive? 
Knowledge Triplets: Ethan Allen Express, metropolitan_transit.transit_line.transit_system, Amtrak
Silver Star, metropolitan_transit.transit_line.transit_system, Amtrak
m.0s90wvz, internet.website_ownership.owner, Federal government of the United States
Silver Star, rail.railway.terminuses, Miami
m.052lsjl, travel.transportation.transport_operator, Amtrak
511.org, user.joehughes.default_domain.transit_application.agencies, Amtrak
Amtrak, travel.transport_operator.travel_destinations_served, m.0yg21tt
Chesapeake, rail.locomotive.owners, m.0y83q80
m.052lxm_, travel.transportation.transport_operator, Amtrak
Amtrak, metropolitan_transit.transit_system.transit_lines, Carolinian
Amtrak, location.location.contains, Cardinal
m.09vj0k5, base.yupgrade.user.topics, Amtrak
Amtrak, travel.transport_operator.travel_destinations_served, m.052lw0l
http://www.4info.net, internet.website.owner, 4INFO
Amtrak, metropolitan_transit.transit_system.transit_lines, Silver Star
Amtrak, travel.transport_operator.travel_destinations_served, m.052v79s
Amtrak, user.joehughes.default_domain.transit_agency.route_stop_information, Bay Area Transit Maps
Amtrak, architecture.architectural_structure_owner.structures_owned, m.0cj7fbn
Amtrak, base.schemastaging.organization_extra.phone_number, m.0q4ckzq
Amtrak, base.schemastaging.organization_extra.phone_number, m.0pm19mj
Miami, rail.railway_terminus.railways_terminating_here, Silver Star
Ana Marie Cox, base.yupgrade.user.topics, Amtrak
Heartland Flyer, metropolitan_transit.transit_line.transit_system, Amtrak
4INFO, business.business_operation.major_customer, Amtrak
Southwest Chief, metropolitan_transit.transit_line.transit_system, Amtrak
Amtrak, metropolitan_transit.transit_system.transit_lines, San Joaquin
Amtrak, base.ontologies.ontology_instance.equivalent_instances, m.09klx0f
davewiner, base.yupgrade.user.topics, Amtrak
Northeast Regional, metropolitan_transit.transit_line.transit_system, Amtrak
m.09klx0f, base.ontologies.ontology_instance_mapping.freebase_topic, Amtrak
Silver Meteor, rail.railway.type_of_railway, m.0j6x4ry
m.0j6x4ry, rail.railway_type_relationship.railway, Silver Meteor
Capitol Corridor, metropolitan_transit.transit_line.transit_system, Amtrak
m.0n9qfyc, organization.leadership.organization, Amtrak
Amtrak, travel.transport_operator.travel_destinations_served, m.059h80r
m.052t09s, travel.transportation.transport_operator, Amtrak
Amtrak, organization.organization.board_members, m.04hykzw
Amtrak, metropolitan_transit.transit_system.transit_lines, Heartland Flyer
m.052zwlg, travel.transportation.transport_operator, Amtrak
Amtrak, location.location.geolocation, m.010r29qs
m.04fnpr4, travel.transportation.transport_operator, Amtrak
Amtrak, metropolitan_transit.transit_system.transit_lines, Vermonter
Bay Area Transit Maps, user.joehughes.default_domain.transit_application.agencies, Amtrak
Amtrak Cascades, metropolitan_transit.transit_line.transit_system, Amtrak
Amtrak, metropolitan_transit.transit_system.transit_lines, Coast Starlight
Amtrak, base.schemastaging.organization_extra.phone_number, m.0q4cl80
m.052v8r1, travel.transportation.transport_operator, Amtrak
Amtrak, travel.transport_operator.travel_destinations_served, m.052lv6j
Amtrak, travel.transport_operator.travel_destinations_served, m.052zwlg
Anderson Cooper, base.yupgrade.user.topics, Amtrak
m.052mw6h, travel.transportation.transport_operator, Amtrak
Amtrak, base.schemastaging.organization_extra.contact_webpages, m.011cgd98
m.052lv6j, travel.transportation.transport_operator, Amtrak
Coast Starlight, metropolitan_transit.transit_line.transit_system, Amtrak
Silver Star, rail.railway.terminuses, New York City
Silver Star, rail.railway.operator_s, m.0j6wc77
m.0519ccc, travel.transportation.transport_operator, Amtrak
Hiawatha Service, metropolitan_transit.transit_line.transit_system, Amtrak
Amtrak, travel.transport_operator.travel_destinations_served, m.052lsss
Amtrak, base.schemastaging.organization_extra.phone_number, m.0q4chw4
m.011m417k, travel.transportation.transport_operator, Amtrak
Amtrak, travel.transport_operator.travel_destinations_served, m.052mw6h
Amtrak, travel.transport_operator.travel_destinations_served, m.0519ccc
Wolverine, metropolitan_transit.transit_line.transit_system, Amtrak
m.0wc5bf3, architecture.ownership.owner, Amtrak
Amtrak, travel.transport_operator.travel_destinations_served, m.0529f06
m.0cj7fbn, architecture.ownership.owner, Amtrak
Amtrak, business.customer.supplier, 4INFO
Amtrak, architecture.architectural_structure_owner.structures_owned, m.0wc5bf3
New York City, rail.railway_terminus.railways_terminating_here, Silver Star
m.09vj0jw, base.yupgrade.user.topics, Amtrak
Amtrak, base.schemastaging.organization_extra.phone_number, m.0q4ch8d
Silver Star, rail.railway.opened, 1947-12-12
Amtrak, metropolitan_transit.transit_system.transit_lines, Empire Service
Vermonter, metropolitan_transit.transit_line.transit_system, Amtrak
m.0j6wc7n, rail.railway_gauge_relationship.railway, Silver Star
Empire Service, metropolitan_transit.transit_line.transit_system, Amtrak
Amtrak, travel.transport_operator.travel_destinations_served, m.04xh7cx
m.04xh7cx, travel.transportation.transport_operator, Amtrak
Amtrak, base.schemastaging.organization_extra.phone_number, m.0q4ckdw
Amtrak, travel.transport_operator.travel_destinations_served, m.052lxm_
Amtrak, metropolitan_transit.transit_system.agency, North Star
Amtrak, travel.transport_operator.travel_destinations_served, m.051rrg1
San Joaquin, metropolitan_transit.transit_line.transit_system, Amtrak
1995 Palo Verde, Arizona derailment, base.culturalevent.event.entity_involved, Amtrak
Amtrak, organization.organization.headquarters, m.0c1k0_j
Amtrak, metropolitan_transit.transit_system.transit_lines, Acela Express
WhiteHouse.gov, internet.website.owner, Federal government of the United States
Amtrak, metropolitan_transit.transit_system.transit_lines, Hiawatha Service
m.0g9ljmt, architecture.ownership.owner, Amtrak
Good Morning America, base.yupgrade.user.topics, Amtrak
m.052v79s, travel.transportation.transport_operator, Amtrak
Amtrak, user.avh.default_domain.ellerdale_topic.ellerdale_id, 0080-7390
Amtrak, base.schemastaging.organization_extra.phone_number, m.0q4cbps
Amtrak, user.joehughes.default_domain.transit_agency.service_areas, San Francisco Bay Area
California Zephyr, metropolitan_transit.transit_line.transit_system, Amtrak
Amtrak, rail.railway_operator.railways, m.0j6wc77
Amtrak, metropolitan_transit.transit_system.transit_lines, Capitol Corridor
m.051rrg1, travel.transportation.transport_operator, Amtrak
Carolinian, metropolitan_transit.transit_line.transit_system, Amtrak
Silver Meteor, metropolitan_transit.transit_line.transit_system, Amtrak
Amtrak, metropolitan_transit.transit_system.transit_lines, California Zephyr
Amtrak, travel.transport_operator.travel_destinations_served, m.052t09s
m.09sq8_9, base.yupgrade.user.topics, Amtrak
Amtrak, metropolitan_transit.transit_system.area_served, United States of America
Amtrak, metropolitan_transit.transit_system.transit_lines, Ethan Allen Express
m.052mzqq, travel.transportation.transport_operator, Amtrak
Amtrak, metropolitan_transit.transit_system.transit_lines, Downeaster
Amtrak, user.joehughes.default_domain.transit_agency.route_stop_information, 511.org
Amtrak, travel.transport_operator.travel_destinations_served, m.04fnpr4
m.0dc4zc3, internet.website_ownership.owner, Federal government of the United States
m.0j6wc77, rail.railway_operator_relationship.from_date, 1947-12-12
m.09vj0kt, base.yupgrade.user.topics, Amtrak
Amtrak, metropolitan_transit.transit_system.transit_lines, Silver Meteor
Amtrak, travel.transport_operator.travel_destinations_served, m.052lsjl
http://www.4info.com/, internet.website.owner, 4INFO
Amtrak, travel.transport_operator.travel_destinations_served, m.052v_jw
m.052zv0y, travel.transportation.transport_operator, Amtrak
Wilmington Rail Viaduct, location.location.containedby, Amtrak
Amtrak, base.schemastaging.organization_extra.contact_webpages, m.010b2frb
Downeaster, metropolitan_transit.transit_line.transit_system, Amtrak
http://www.AdHaven.com, internet.website.owner, 4INFO
Amtrak, base.schemastaging.organization_extra.phone_number, m.011cjmpl
m.0y83q80, rail.locomotive.owners, Chesapeake
Amtrak, travel.transport_operator.travel_destinations_served, m.052n0j9
m.09sq912, base.yupgrade.user.topics, Amtrak
Acela Express, metropolitan_transit.transit_line.transit_system, Amtrak
Amtrak, rail.locomotive_ownership.owner, m.0y83q80
North Star, metropolitan_transit.transit_agency.systems, Amtrak
Amtrak, metropolitan_transit.transit_system.transit_lines, Keystone Service
m.0y83q80, rail.locomotive_ownership.locomotive, Chesapeake
Amtrak, base.schemastaging.organization_extra.phone_number, m.0q4cjjb
Amtrak, metropolitan_transit.transit_system.transit_lines, Pacific Surfliner
Silver Star, rail.railway.length, 2449.0
m.06h_8hr, base.yupgrade.user.topics, Amtrak
m.0j6wc77, rail.railway_operator_relationship.railway, Silver Star
United States of America, government.governmental_jurisdiction.agencies, Amtrak
Amtrak, base.schemastaging.organization_extra.phone_number, m.0pm1ct7
Keystone Service, metropolitan_transit.transit_line.transit_system, Amtrak
m.09vj0jk, base.yupgrade.user.topics, Amtrak
m.051j8z1, travel.transportation.transport_operator, Amtrak
Amtrak, travel.transport_operator.travel_destinations_served, m.052v8r1
Pacific Surfliner, metropolitan_transit.transit_line.transit_system, Amtrak
Amtrak, government.government_agency.jurisdiction, United States of America
Amtrak, metropolitan_transit.transit_system.transit_lines, Wolverine
m.0j6wc77, rail.railway_operator_relationship.operator, Amtrak
Amtrak, base.schemastaging.organization_extra.phone_number, m.0pm1kqs
Amtrak, travel.transport_operator.travel_destinations_served, m.052zv0y
Amtrak, government.government_agency.government, Federal government of the United States
Cardinal, location.location.containedby, Amtrak
m.052n0j9, travel.transportation.transport_operator, Amtrak
m.052v_jw, travel.transportation.transport_operator, Amtrak
Federal government of the United States, government.government.agency, Amtrak
Amtrak, metropolitan_transit.transit_system.transit_lines, Northeast Regional
m.0qslvpq, dataworld.gardening_hint.last_referenced_by, Amtrak
Amtrak, metropolitan_transit.transit_system.transit_lines, Amtrak Cascades
Silver Star, rail.railway.gauge, m.0j6wc7n
m.059h80r, travel.transportation.transport_operator, Amtrak
Amtrak, travel.transport_operator.travel_destinations_served, m.051j8z1
m.04hykzw, organization.organization_board_membership.organization, Amtrak
m.09vj0kh, base.yupgrade.user.topics, Amtrak
m.0ryrsm8, internet.website_ownership.owner, Federal government of the United States
m.0wg2sv_, travel.transportation.mode_of_transportation, Amtrak
Amtrak, metropolitan_transit.transit_system.transit_lines, Southwest Chief
San Francisco Bay Area, user.joehughes.default_domain.transit_service_area.transit_agencies, Amtrak
m.0y83q80, rail.locomotive_ownership.owner, Amtrak
Amtrak, organization.organization.leadership, m.0n9qfyc
Amtrak, rail.locomotive_owner.locomotives_owned, m.0y83q80
m.052lsss, travel.transportation.transport_operator, Amtrak
m.0yg21tt, travel.transportation.transport_operator, Amtrak
Amtrak, travel.transport_operator.travel_destinations_served, m.011m417k
m.052lw0l, travel.transportation.transport_operator, Amtrak
Amtrak, architecture.architectural_structure_owner.structures_owned, m.0g9ljmt
m.0529f06, travel.transportation.transport_operator, Amtrak
Amtrak, location.location.contains, Wilmington Rail Viaduct
Amtrak, travel.transport_operator.travel_destinations_served, m.052mzqq

Answer: Chesapeake