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 position does Vernon Davis play? 
Knowledge Triplets: m.03pq4kx, people.place_lived.person, Vernon Davis
Vernon Davis, american_football.football_player.games, m.0903_l3
United States of America, location.country.administrative_divisions, Washington, D.C.
Vernon Davis, american_football.football_player.receiving, m.07vzscn
Vernon Davis, american_football.football_player.receiving, m.09grs6b
Vernon Davis sideline, common.image.size, m.09hrs5t
Vernon Davis, american_football.football_player.receiving, m.096py4q
Vernon Davis, american_football.football_player.position_s, Tight end
Vernon Davis, american_football.football_player.games, m.088ypbh
m.09knb4f, american_football.player_game_statistics.player, Vernon Davis
Vernon Davis, american_football.football_player.games, m.098kb94
Vernon Davis, american_football.football_player.games, m.07ych4w
Vernon Davis, american_football.football_player.receiving, m.088yq1r
Vernon Davis, american_football.football_player.receiving, m.07tf85v
Vernon Davis, sports.pro_athlete.sports_played_professionally, m.0c54mkk
Vernon Davis, american_football.football_player.receiving, m.07ychhq
Washington, D.C., base.aareas.schema.administrative_area.administrative_parent, United States of America
m.07ychhq, american_football.player_receiving_statistics.player, Vernon Davis
Vernon Davis, american_football.football_player.position_s, Tight end
m.02xgn4k, sports.sports_team_roster.player, Vernon Davis
m.05bv5rr, sports.sports_league_draft_pick.player, Vernon Davis
Vernon Davis, people.person.education, m.0n1m235
m.0hph_3_, sports.sports_team_roster.player, Vernon Davis
Washington, D.C., base.biblioness.bibs_location.country, United States of America
m.096py4q, american_football.player_receiving_statistics.player, Vernon Davis
Vernon Davis, people.person.profession, American football player
Vernon Davis, american_football.football_player.rushing, m.0791hzz
Vernon Davis, sports.pro_athlete.teams, m.0hph_3_
m.0791j46, american_football.player_receiving_statistics.player, Vernon Davis
Vernon Davis, people.person.education, m.03gkp1m
m.07tf85v, american_football.player_receiving_statistics.player, Vernon Davis
American football player, freebase.type_profile.equivalent_topic, American football player
Vernon Davis, base.schemastaging.athlete_extra.salary, m.0j2kdc3
Vernon Davis, american_football.football_player.receiving, m.07z2fp3
m.07sh7xd, american_football.player_game_statistics.player, Vernon Davis
m.09tcwsl, american_football.player_receiving_statistics.player, Vernon Davis
m.0j2kdc3, base.schemastaging.athlete_salary.athlete, Vernon Davis
Vernon Davis, american_football.football_player.games, m.09k07ch
m.07sh85d, american_football.player_receiving_statistics.player, Vernon Davis
Vernon Davis, american_football.football_player.games, m.08nl_b0
m.0hpj5tk, people.sibling_relationship.sibling, Vernon Davis
Vernon Davis, common.topic.article, m.0br8mb
Vernon Davis, american_football.football_player.receiving, m.098kbpz
Vernon Davis, people.person.parents, Duke Davis
United States of America, base.biblioness.bibs_topic.subsumes, United States of America
m.07tf6vs, american_football.player_game_statistics.player, Vernon Davis
Washington, D.C., location.administrative_division.first_level_division_of, United States of America
Vernon Davis, american_football.football_player.games, m.07sh7xd
Washington, D.C., location.location.containedby, United States of America
Vernon Davis, people.person.gender, Male
Vernon Davis, american_football.football_player.receiving, m.09040tc
m.02xgn4k, sports.sports_team_roster.position, Tight end
m.09k07ch, american_football.player_game_statistics.player, Vernon Davis
Vernon Davis, sports.drafted_athlete.drafted, m.05bv5rr
m.088ypbh, american_football.player_game_statistics.player, Vernon Davis
m.09knbj1, american_football.player_receiving_statistics.player, Vernon Davis
m.0hph_3_, sports.sports_team_roster.position, Tight end
m.07z2fbn, american_football.player_game_statistics.player, Vernon Davis
m.07mmqv0, american_football.player_receiving_statistics.player, Vernon Davis
Washington, D.C., location.hud_county_place.place, Washington, D.C.
Vernon Davis, american_football.football_player.receiving, m.09k07r4
m.03pq4kx, people.place_lived.location, Washington, D.C.
m.098kb94, american_football.player_game_statistics.player, Vernon Davis
Vernon Davis, american_football.football_player.receiving, m.07sh85d
Vernon Davis, american_football.football_player.games, m.09knb4f
Vernon Davis, american_football.football_player.receiving, m.09rmg7n
Washington, D.C., base.biblioness.bibs_topic.is_really, Washington, D.C.
Vernon Davis, american_football.football_player.receiving, m.09rf960
Vernon Davis, american_football.football_player.games, m.07tf6vs
Vernon Davis, common.topic.notable_for, g.1255n5n4x
m.09grrvc, american_football.player_game_statistics.player, Vernon Davis
m.088yq1r, american_football.player_receiving_statistics.player, Vernon Davis
m.09rmg7n, american_football.player_receiving_statistics.player, Vernon Davis
Vernon Davis, american_football.football_player.receiving, m.07mmqv0
m.07z2fp3, american_football.player_receiving_statistics.player, Vernon Davis
m.0791hzz, american_football.player_rushing_statistics.player, Vernon Davis
m.098kbpz, american_football.player_receiving_statistics.player, Vernon Davis
m.0c54mkk, sports.pro_sports_played.athlete, Vernon Davis
Vernon Davis, american_football.football_player.receiving, m.09tcwsl
m.07nvq_b, american_football.player_game_statistics.player, Vernon Davis
United States of America, base.biblioness.bibs_topic.is_really, United States of America
Vernon Davis, american_football.football_player.games, m.096pxdb
Vernon Davis, common.topic.notable_types, American football player
Washington, D.C., location.administrative_division.country, United States of America
Vernon Davis, american_football.football_player.receiving, m.0791j46
m.08nl_pm, american_football.player_receiving_statistics.player, Vernon Davis
m.03gkp1m, education.education.student, Vernon Davis
Vernon Davis, american_football.football_player.games, m.07z2fbn
Washington, D.C., base.biblioness.bibs_topic.subsumes, Washington, D.C.
Vernon Davis, american_football.football_player.games, m.09tcwdt
Vernon Davis, base.schemastaging.athlete_extra.salary, m.0j2k3bc
Vernon Davis, american_football.football_player.games, m.07nvq_b
Vernon Davis, american_football.football_player.receiving, m.09knbj1
Vernon Davis, people.person.sibling_s, m.0hpj5tk
m.09040tc, american_football.player_receiving_statistics.player, Vernon Davis
Vernon Davis, common.topic.image, Vernon Davis on field pregame at Eagles at 49ers 10-12-08 1
m.07vzscn, american_football.player_receiving_statistics.player, Vernon Davis
Vernon Davis, american_football.football_player.games, m.09grrvc
Vernon Davis, sports.pro_athlete.teams, m.02xgn4k
m.09grs6b, american_football.player_receiving_statistics.player, Vernon Davis
Vernon Davis, common.topic.image, Vernondavis
m.08nl_b0, american_football.player_game_statistics.player, Vernon Davis
Vernon Davis, common.topic.image, Vernon Davis sideline
Vernon Davis sideline, common.image.appears_in_topic_gallery, Vernon Davis
Vernon Davis, people.person.place_of_birth, Washington, D.C.
United States of America, base.aareas.schema.administrative_area.administrative_children, Washington, D.C.
m.096pxdb, american_football.player_game_statistics.player, Vernon Davis
m.0n1m235, education.education.student, Vernon Davis
Vernon Davis, american_football.football_player.receiving, m.08nl_pm
m.0j2k3bc, base.schemastaging.athlete_salary.athlete, Vernon Davis
United States of America, location.country.capital, Washington, D.C.
m.0903_l3, american_football.player_game_statistics.player, Vernon Davis
Vernon Davis, american_football.football_player.games, m.09rmfwx
Vernon Davis, people.person.parents, Jacqueline Davis
m.09k07r4, american_football.player_receiving_statistics.player, Vernon Davis
m.09tcwdt, american_football.player_game_statistics.player, Vernon Davis
m.09rf960, american_football.player_receiving_statistics.player, Vernon Davis
m.07ych4w, american_football.player_game_statistics.player, Vernon Davis
American football player, freebase.equivalent_topic.equivalent_type, American football player
United States of America, location.country.first_level_divisions, Washington, D.C.
Vernon Davis, people.person.nationality, United States of America
American football player, people.profession.corresponding_type, American football player
m.09rf8ty, american_football.player_game_statistics.player, Vernon Davis
Vernon Davis, people.person.places_lived, m.03pq4kx
Vernon Davis, american_football.football_player.forty_yard_dash_time, m.0hpj5n9
Vernon Davis, american_football.football_player.games, m.07vzs1m
Vernon Davis, american_football.football_player.games, m.09rf8ty
m.07vzs1m, american_football.player_game_statistics.player, Vernon Davis
Vernon Davis sideline, common.image.appears_in_topic_gallery, Vernon Davis
m.09rmfwx, american_football.player_game_statistics.player, Vernon Davis

Answer: Tight end