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: In the year of 2008, what two individuals represented the state of Colorado in the United States senate? 
Knowledge Triplets: United States Senate elections, 2008, time.event.previous_in_series, United States Senate elections, 2006
Colorado, common.topic.article, m.02h9c27
United States Senate elections, 2008, government.general_election.includes_general_elections, United States Senate election in Mississippi, 2008
United States Senate election in Colorado, 2010, government.election.general_election, United States Senate elections, 2010
Colorado, common.topic.webpage, m.09xzb4d
Secretary of State of Colorado, government.government_office_or_title.office_holders, m.010f0mcq
United States Senate elections, 2008, common.topic.notable_for, g.125804hj9
Colorado, common.topic.webpage, m.09ym1f_
United States Senate elections, 2008, government.general_election.contests, United States Senate election in New Mexico, 2008
m.09qpj_s, government.government_position_held.district_represented, Colorado
United States Senate elections, 2010, common.topic.image, Harry Reid official portrait
m.09qpc0p, government.government_position_held.governmental_body, United States Senate
Colorado state elections, 2008, government.general_election.includes_general_elections, United States House of Representatives elections in Colorado, 2008
m.09qph80, government.government_position_held.district_represented, Colorado
Colorado, common.topic.webpage, m.09wjbs0
m.04lssp_, common.webpage.topic, Colorado
United States Senate election in Tennessee, 2008, government.election.general_election, United States Senate elections, 2008
United States Senate elections, 2010, time.event.instance_of_recurring_event, United States Senate election
United States Senate elections, 2008, government.general_election.contests, United States Senate election in North Carolina, 2008
Colorado, government.political_district.representatives, m.09qpdz3
United States Senator, base.descriptive_names.names.descriptive_name, m.0100zlls
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Texas, 2008
m.07wwnf8, base.newsevents.news_report.event, United States Senate elections, 2008
m.09qpmph, government.government_position_held.governmental_body, United States Senate
Colorado, government.political_district.representatives, m.09qpn2q
United States Senate election in Kentucky, 2008, government.election.office, United States Senator
Colorado, common.topic.image, Colorado.png
United States Senate election in Louisiana, 2008, common.topic.notable_types, Election contest
United States Senate election in Colorado, 2008, common.topic.article, m.027phsx
Colorado, government.political_district.representatives, m.05kfbwl
m.02_wy4l, government.government_position_held.district_represented, Colorado
United States Senate election in Nebraska, 2008, common.topic.notable_types, Election contest
United States Senate election in New Mexico, 2008, government.election.general_election, United States Senate elections, 2008
United States Senate election in Georgia, 2008, government.election.office, United States Senator
Colorado, common.topic.webpage, m.09y73nf
United States Senate election in Virginia, 2008, government.election.general_election, United States Senate elections, 2008
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Montana, 2008
United States Senate election in Nebraska, 2008, government.election.general_election, United States Senate elections, 2008
United States Senate election in Michigan, 2008, government.election.general_election, United States Senate elections, 2008
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Nebraska, 2008
United States Senate election in Michigan, 2008, government.election.office, United States Senator
Colorado, government.political_district.representatives, m.09qpljc
m.09y7j64, common.webpage.topic, Colorado
Secretary of State of Colorado, government.government_office_or_title.jurisdiction, Colorado
m.02_wy4l, government.government_position_held.governmental_body, United States Senate
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Colorado, 2008
m.09x4jbd, common.webpage.topic, Colorado
United States Senate elections, 2008, government.general_election.contests, United States Senate election in New Hampshire, 2008
m.09qpfbx, government.government_position_held.district_represented, Colorado
Colorado, government.political_district.representatives, m.09qphlq
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Maine, 2008
United States Senate election in Michigan, 2008, common.topic.notable_types, Election contest
Colorado, government.political_district.representatives, m.09qpm93
United States Senate election in Oregon, 2008, government.election.general_election, United States Senate elections, 2008
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Oklahoma, 2008
m.09qppf9, government.government_position_held.district_represented, Colorado
United States Senate election in Colorado, 2008, government.election.winner, Mark Udall
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Iowa, 2008
Colorado, location.location.containedby, Contiguous United States
Colorado, base.biblioness.bibs_location.country, United States of America
United States Senate election in Tennessee, 2008, common.topic.notable_types, Election contest
Colorado, government.political_district.representatives, m.09qplwr
United States Senate election in Colorado, 2008, government.election.general_election, United States Senate elections, 2008
Colorado state elections, 2008, government.general_election.contests, United States Senate election in Colorado, 2008
Colorado, government.political_district.elections, United States Senate election in Colorado, 2010
m.09qpcbn, government.government_position_held.governmental_body, United States Senate
United States Senate election in New Jersey, 2008, common.topic.notable_types, Election contest
United States Senate election in Colorado, 2010, common.topic.notable_types, Election contest
m.09ys6rr, common.webpage.topic, Colorado
Colorado, book.written_work.subjects, United States of America
m.09qpj0b, government.government_position_held.district_represented, Colorado
600px-Senate_Seal.svg.png, common.image.appears_in_topic_gallery, United States Senate
United States of America, government.governmental_jurisdiction.government_bodies, United States Senate
m.09qpjp_, government.government_position_held.district_represented, Colorado
m.05kfbwl, government.government_position_held.governmental_body, United States Senate
United States Senate election in Alaska, 2008, government.election.general_election, United States Senate elections, 2008
Colorado, government.political_district.representatives, m.09qpcz7
m.0hz6xmv, government.government_position_held.office_position_or_title, Secretary of State of Colorado
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Illinois, 2008
United States Senate election in Montana, 2008, government.election.general_election, United States Senate elections, 2008
m.09qpblf, government.government_position_held.district_represented, Colorado
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Arkansas, 2008
Colorado, common.topic.webpage, m.09x4jbd
Colorado, book.book_subject.works, Eventide
United States Senate election in Kentucky, 2008, common.topic.notable_types, Election contest
m.09qpcmr, government.government_position_held.district_represented, Colorado
United States Senate election in Alabama, 2008, government.election.general_election, United States Senate elections, 2008
United States Senate elections, 2006, common.topic.image, Harry Reid official portrait
United States of America, base.aareas.schema.administrative_area.administrative_children, Colorado
m.09qplwr, government.government_position_held.district_represented, Colorado
m.09x32b8, common.webpage.topic, Colorado
m.09qpnl3, government.government_position_held.district_represented, Colorado
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Virginia, 2008
m.09y9d9t, common.webpage.topic, Colorado
m.09qpgzn, government.government_position_held.district_represented, Colorado
United States Senator, common.topic.notable_for, g.1259lv35m
United States Senate election in Nebraska, 2008, government.election.office, United States Senator
m.09xwmmb, common.webpage.topic, Colorado
Colorado state elections, 2008, government.general_election.includes_general_elections, Colorado State Senate elections, 2008
United States Senate elections, 2008, government.general_election.contests, United States Senate election in South Dakota, 2008
United States Senate election in Alaska, 2008, common.topic.notable_types, Election contest
m.09qpg7j, government.government_position_held.district_represented, Colorado
United States Senate election in Colorado, 2010, government.election.district, Colorado
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Kansas, 2008
m.09qpkmw, government.government_position_held.district_represented, Colorado
Colorado, government.political_district.representatives, m.09qpjp_
m.09qpdp3, government.government_position_held.district_represented, Colorado
Colorado, book.book_subject.works, Redeye
Colorado, common.topic.article, m.01n55
m.09qpm93, government.government_position_held.district_represented, Colorado
United States Senate election in Massachusetts, 2008, government.election.office, United States Senator
Colorado, common.topic.webpage, m.09ymzbp
Colorado, book.book_subject.works, Iced
Colorado, common.topic.webpage, m.0b6s0lm
United States Senator, base.descriptive_names.names.descriptive_name, m.01011vcr
United States Senate election in Texas, 2008, common.topic.notable_types, Election contest
m.09qpj87, government.government_position_held.district_represented, Colorado
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Oregon, 2008
United States Senate election in Colorado, 2008, government.election.general_election, Colorado state elections, 2008
United States Senate elections, 2006, time.event.next_in_series, United States Senate elections, 2008
Colorado, book.book_subject.works, Colorado
Colorado, government.political_district.representatives, m.05kh0nn
Colorado state elections, 2008, common.topic.notable_types, General election
Colorado, government.political_district.representatives, m.09qpj_s
Colorado Attorney General, common.topic.notable_types, Government Office or Title
United States Senator, government.government_office_or_title.governmental_body_if_any, United States Senate
Colorado, government.political_district.representatives, m.09qph80
United States Senate elections, 2008, common.topic.notable_types, General election
Colorado, location.administrative_division.country, United States of America
m.0gmk36f, common.webpage.topic, Colorado
United States Congress, government.governmental_body.component_bodies, United States Senate
Colorado, location.location.containedby, United States of America
Colorado, government.political_district.representatives, m.09qpc0p
United States Senate elections, 2008, common.topic.image, Harry Reid official portrait
Colorado, common.topic.webpage, m.09x32b8
United States Senate election in Iowa, 2008, government.election.office, United States Senator
United States Senate election in Colorado, 2008, common.image.appears_in_topic_gallery, Mark Udall
United States Senate elections, 2008, common.topic.image, Senate Seats up for election:██ Republican incumbent██ Retiring Republican██ Democratic incumbent██ No election
Colorado, government.political_district.representatives, m.09qpg7j
United States of America, base.locations.countries.states_provinces_within, Colorado
m.09qph80, government.government_position_held.governmental_body, United States Senate
m.09wjbs0, common.webpage.topic, Colorado
United States Senator, fictional_universe.character_occupation.characters_with_this_occupation, Nathan Petrelli
Colorado General Assembly, government.governmental_body.members, m.0116362w
600px-Senate_Seal.svg.png, common.image.appears_in_topic_gallery, United States Senator
United States Senate election in Montana, 2008, common.topic.notable_types, Election contest
Colorado, government.political_district.representatives, m.09qpq8g
m.09qpfy6, government.government_position_held.district_represented, Colorado
m.09qpcbn, government.government_position_held.district_represented, Colorado
United States Senate election in Iowa, 2008, common.topic.notable_types, Election contest
United States Senate election in Colorado, 2008, common.topic.image, Mark Udall
m.09qpm93, government.government_position_held.governmental_body, United States Senate
United States Senator, base.descriptive_names.names.descriptive_name, m.01011v98
United States Senate election in Massachusetts, 2008, common.topic.notable_types, Election contest
Secretary of State of Colorado, common.topic.notable_types, Government Office or Title
m.09xzb4d, common.webpage.topic, Colorado
Colorado, common.topic.webpage, m.09wfzmy
m.09qpdz3, government.government_position_held.district_represented, Colorado
Colorado, common.topic.webpage, m.09xwmmb
United States Senate elections, 2006, time.event.instance_of_recurring_event, United States Senate election
m.09x62z9, common.webpage.topic, Colorado
Colorado, government.political_district.representatives, m.09qpqjx
United States Senate elections, 2008, government.general_election.contests, United States Senate election in West Virginia, 2008
Colorado, common.topic.webpage, m.09x62z9
m.09qpq8g, government.government_position_held.district_represented, Colorado
Colorado, common.topic.webpage, m.0b4717c
m.0b4717c, common.webpage.topic, Colorado
United States Senator, base.descriptive_names.names.descriptive_name, m.01011v2m
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Rhode Island, 2008
United States Senate election in Louisiana, 2008, government.election.office, United States Senator
United States elections, 2008, common.topic.notable_types, General election
United States Senate election in Iowa, 2008, government.election.general_election, United States Senate elections, 2008
United States Senate, government.governmental_body.offices_positions, United States Senator
United States Senate election in Illinois, 2008, common.topic.notable_types, Election contest
m.09x75r8, common.webpage.topic, Colorado
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Kentucky, 2008
United States Senate elections, 2008, common.topic.image, Harry Reid official portrait 2009
United States Senate election in Colorado, 2008, government.election.office, United States Senator
Colorado, government.political_district.representatives, m.09qpfbx
Colorado, government.political_district.representatives, m.09qpdp3
m.09qpl1y, government.government_position_held.district_represented, Colorado
Colorado, common.topic.webpage, m.09x75r8
Contiguous United States, location.location.contains, Colorado
Colorado, common.topic.webpage, m.09y7j64
Colorado, government.political_district.representatives, m.09qpj87
United States Senator, government.government_office_or_title.jurisdiction, United States of America
m.09qphlq, government.government_position_held.district_represented, Colorado
United States Senator, government.government_office_or_title.governmental_body_if_any, United States Congress
Colorado, common.topic.webpage, m.09wjfjg
Colorado General Assembly, government.governmental_body.members, m.0x1ylhs
United States Senate election in Louisiana, 2008, government.election.general_election, United States Senate elections, 2008
Colorado, government.political_district.representatives, m.09qpk8s
United States Senate election in Alabama, 2008, common.topic.notable_types, Election contest
United States Senate election in Georgia, 2008, common.topic.notable_types, Election contest
United States Senate elections, 2010, government.general_election.contests, United States Senate election in Colorado, 2010
United States Senate election in New Mexico, 2008, government.election.office, United States Senator
Colorado State Patrol, government.government_agency.jurisdiction, Colorado
Colorado, government.political_district.representatives, m.02_wy4l
m.09y73nf, common.webpage.topic, Colorado
Colorado, government.political_district.representatives, m.09qpj0b
Colorado, book.book_subject.works, Hard truth
United States Senator, base.descriptive_names.names.descriptive_name, m.01011v8s
Colorado, government.political_district.representatives, m.09qpkmw
m.09qpmph, government.government_position_held.district_represented, Colorado
United States elections, 2008, government.general_election.includes_general_elections, United States Senate elections, 2008
m.09qpgzn, government.government_position_held.governmental_body, United States Senate
Colorado, government.political_district.representatives, m.09qpd93
Colorado, common.topic.webpage, m.09ys6rr
Colorado, common.topic.webpage, m.0b47jr4
m.09qpcz7, government.government_position_held.governmental_body, United States Senate
United States Senate election in Colorado, 2008, government.election.district, Colorado
Colorado, government.political_district.representatives, m.09qpfy6
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Delaware, 2008
Colorado, common.topic.webpage, m.09x4gp3
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Alaska, 2008
m.09qplwr, government.government_position_held.governmental_body, United States Senate
m.05kh0nn, government.government_position_held.governmental_body, United States Senate
Colorado, government.political_district.representatives, m.09qpgzn
Colorado, government.political_district.representatives, m.09qpcmr
Colorado, base.locations.states_and_provences.country, United States of America
United States Senate election in Kansas, 2008, government.election.general_election, United States Senate elections, 2008
Colorado, government.political_district.representatives, m.09qprsc
United States Senate election in Massachusetts, 2008, government.election.general_election, United States Senate elections, 2008
m.0b47jr4, common.webpage.topic, Colorado
United States Senator, common.topic.image, 600px-Senate_Seal.svg.png
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Louisiana, 2008
Colorado, government.political_district.representatives, m.09qpcbn
m.09qprsc, government.government_position_held.governmental_body, United States Senate
Colorado, common.topic.notable_for, g.125c79s4m
United States Senate, government.governmental_body.jurisdiction, United States of America
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Tennessee, 2008
United States Senate election in Tennessee, 2008, government.election.office, United States Senator
m.09qpp0t, government.government_position_held.district_represented, Colorado
United States Senate election in Kansas, 2008, government.election.office, United States Senator
m.09qpqjx, government.government_position_held.district_represented, Colorado
Colorado, government.political_district.representatives, m.02_wstr
m.09qpljc, government.government_position_held.district_represented, Colorado
United States Senate election in Colorado, 2008, common.topic.notable_for, g.1258mvlgz
United States Senate elections, 2008, time.event.instance_of_recurring_event, United States Senate election
m.09qprsc, government.government_position_held.district_represented, Colorado
United States Senate election in Texas, 2008, government.election.office, United States Senator
Colorado, common.topic.webpage, m.09y9d9t
United States Senate elections, 2010, time.event.previous_in_series, United States Senate elections, 2008
Colorado, government.political_district.representatives, m.09qppf9
United States Senate election in Texas, 2008, government.election.general_election, United States Senate elections, 2008
m.09qpc0p, government.government_position_held.district_represented, Colorado
Colorado, government.political_district.representatives, m.09qpl1y
Colorado, government.political_district.representatives, m.09qpp0t
m.05kh0nn, government.government_position_held.district_represented, Colorado
United States Senate elections, 2008, common.topic.article, m.04958v
United States Senator, base.descriptive_names.names.descriptive_name, m.01011v4m
United States Senate elections, 2006, common.topic.notable_types, Election contest
m.02_wstr, government.government_position_held.district_represented, Colorado
United States elections, 2008, government.general_election.includes_general_elections, Colorado state elections, 2008
Colorado, common.topic.notable_types, US State
United States Senate election in Oregon, 2008, common.topic.notable_types, Election contest
m.09qpn2q, government.government_position_held.district_represented, Colorado
m.09qpd93, government.government_position_held.district_represented, Colorado
United States Senate election in Kansas, 2008, common.topic.notable_types, Election contest
Colorado, book.book_subject.works, Zeph
Colorado, common.topic.image, National-atlas-colorado
United States Senate elections, 2008, base.newsevents.news_reported_event.news_report_s, m.07wwnf8
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Massachusetts, 2008
Colorado, location.administrative_division.first_level_division_of, United States of America
United States Senate election in Illinois, 2008, government.election.general_election, United States Senate elections, 2008
Colorado General Assembly, government.governmental_body.jurisdiction, Colorado
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Minnesota, 2008
m.09ymzbp, common.webpage.topic, Colorado
United States elections, 2008, time.event.locations, United States of America
m.09qpb7n, government.government_position_held.district_represented, Colorado
Colorado, location.us_state.capital, Denver
Colorado, base.aareas.schema.administrative_area.administrative_parent, United States of America
m.09qpl1y, government.government_position_held.governmental_body, United States Senate
m.09qpcz7, government.government_position_held.district_represented, Colorado
United States Senate elections, 2008, government.general_election.contests, United States Senate election in New Jersey, 2008
United States Senate election in Kentucky, 2008, government.election.general_election, United States Senate elections, 2008
United States Senator, common.topic.notable_types, Government Office or Title
United States Senate election in Alabama, 2008, government.election.office, United States Senator
Colorado, location.location.containedby, United States, with Territories
United States Senate election in Illinois, 2008, government.election.office, United States Senator
Colorado, government.political_district.representatives, m.09qpb7n
m.09wfzmy, common.webpage.topic, Colorado
United States Senate elections, 2006, common.topic.image, Harry Reid official portrait 2009
United States Senate election in Georgia, 2008, government.election.general_election, United States Senate elections, 2008
United States Senate election in New Jersey, 2008, government.election.office, United States Senator
United States of America, location.country.first_level_divisions, Colorado
United States Senate election in Virginia, 2008, government.election.office, United States Senator
United States Senate elections, 2008, government.general_election.contests, United States Senate election in South Carolina, 2008
Colorado, government.political_district.representatives, m.09qpmph
m.09qpk8s, government.government_position_held.governmental_body, United States Senate
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Alabama, 2008
Colorado, government.political_district.representatives, m.09qpblf
m.09qpcmr, government.government_position_held.governmental_body, United States Senate
Colorado, government.governmental_jurisdiction.government_positions, Secretary of State of Colorado
Mark Udall, common.image.appears_in_topic_gallery, United States Senate election in Colorado, 2008
Colorado, government.political_district.elections, United States Senate election in Colorado, 2008
Colorado, common.topic.webpage, m.04lssp_
United States Senate election in Oregon, 2008, government.election.office, United States Senator
United States Senate election in New Jersey, 2008, government.election.general_election, United States Senate elections, 2008
Secretary of State of Colorado, government.government_office_or_title.office_holders, m.0hz6xmv
United States Senate elections, 2008, government.general_election.includes_general_elections, United States Senate election in Wyoming, 2008
United States Senator, base.descriptive_names.names.descriptive_name, m.01011v3g
m.09ym1f_, common.webpage.topic, Colorado
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Michigan, 2008
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Georgia, 2008
United States Senate election in New Mexico, 2008, common.topic.notable_types, Election contest
United States Congress, government.governmental_body.offices_positions, United States Senator
United States Senator, base.descriptive_names.names.descriptive_name, m.01011v5t
United States of America, government.governmental_jurisdiction.government_positions, United States Senator
United States Senate elections, 2008, government.general_election.part_of_general_election, United States elections, 2008
Colorado state elections, 2008, common.topic.notable_for, g.12550b38p
Colorado state elections, 2008, government.general_election.includes_general_elections, Colorado House of Representatives elections, 2008
m.010f0mcq, government.government_position_held.office_position_or_title, Secretary of State of Colorado
United States Senate, common.topic.image, 600px-Senate_Seal.svg.png
United States Senate elections, 2008, time.event.next_in_series, United States Senate elections, 2010
United States Senate election in Alaska, 2008, government.election.office, United States Senator
United States Senate, government.governmental_body.body_this_is_a_component_of, United States Congress
United States Senate election in Colorado, 2010, government.election.office, United States Senator
Colorado, common.topic.webpage, m.09x37bx
m.05kfbwl, government.government_position_held.district_represented, Colorado
m.09x6dx8, common.webpage.topic, Colorado
m.09wjfjg, common.webpage.topic, Colorado
United States Senate elections, 2010, common.topic.notable_types, General election
United States Senate election in Montana, 2008, government.election.office, United States Senator
United States of America, location.country.administrative_divisions, Colorado
m.09qpj87, government.government_position_held.governmental_body, United States Senate
United States Senator, base.descriptive_names.names.descriptive_name, m.01011vbp
Colorado Republican caucuses, 2012, common.topic.notable_types, Event
m.09qpk8s, government.government_position_held.district_represented, Colorado
United States Senate elections, 2008, government.general_election.contests, United States Senate election in Idaho, 2008
United States Senate election in Virginia, 2008, common.topic.notable_types, Election contest
United States Senate election in Colorado, 2008, common.topic.notable_types, Election contest
Colorado state elections, 2008, government.general_election.part_of_general_election, United States elections, 2008
Colorado, common.topic.webpage, m.0gmk36f
Colorado, common.topic.webpage, m.09x6dx8
Colorado, government.political_district.representatives, m.09qpnl3

Answer: Mark Udall
Michael Bennet