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: who is the head coach of the tennessee titans? 
Knowledge Triplets: Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.rushing, m.07vr7yf
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.passing, m.098jljr
Tennessee Titans at Baltimore Ravens, 2008-10-05, american_football.football_game.receiving, m.0792r15
Tennessee Titans, common.topic.webpage, m.0dhtcj1
Tennessee Titans at San Francisco 49ers, 2009-11-08, american_football.football_game.receiving, m.088x1r0
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.receiving, m.07vr7_4
Tennessee Titans at Detroit Lions, 2008-11-27, american_football.football_game.receiving, m.0792smz
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.passing, m.0792zj1
Tennessee Titans at San Francisco 49ers, 2009-11-08, common.topic.notable_for, g.1259ntl4j
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.receiving, m.098jlnf
Tennessee Titans at Detroit Lions, 2008-11-27, american_football.football_game.receiving, m.0792sp0
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.receiving, m.07vr7wg
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.passing, m.0792t4d
Tennessee Titans at San Francisco 49ers, 2009-11-08, american_football.football_game.receiving, m.088x1nn
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.receiving, m.0792r8v
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.receiving, m.07vr7v2
m.0_rd9cq, american_football.football_historical_coach_position.team, Tennessee Titans
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, common.topic.notable_for, g.1259w1gw_
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.receiving, m.0792r9t
Tennessee Titans at Baltimore Ravens, 2008-10-05, common.topic.notable_for, g.125bwrm90
Tennessee Titans at Detroit Lions, 2008-11-27, american_football.football_game.receiving, m.0793yzr
Tennessee Titans, sports.sports_team.coaches, m.0_1y4t_
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.home_team, New England Patriots
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.receiving, m.0792t99
Tennessee Titans at San Francisco 49ers, 2009-11-08, american_football.football_game.receiving, m.088x1zr
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.receiving, m.0792tbh
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.receiving, m.0792tbw
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.receiving, m.098jlss
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.passing, m.07jq8lk
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.receiving, m.098jlrr
Tennessee Titans at Detroit Lions, 2008-11-27, american_football.football_game.receiving, m.0793ywj
Tennessee Titans at Detroit Lions, 2008-11-27, american_football.football_game.rushing, m.0792skg
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.receiving, m.07jq8qk
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.receiving, m.098jlt3
Tennessee Titans at New England Patriots, 2009-10-18, common.topic.notable_for, g.125bb5g_4
Tennessee Titans, common.topic.webpage, m.0422dwy
Tennessee Titans at Detroit Lions, 2008-11-27, common.topic.notable_for, g.1256vb1py
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.receiving, m.07vr7_h
Tennessee Titans at New York Jets, 2009-09-27, american_football.football_game.receiving, m.07nn1jj
Tennessee Titans at Detroit Lions, 2008-11-27, american_football.football_game.passing, m.0792sj4
Tennessee Titans at Detroit Lions, 2008-11-27, american_football.football_game.receiving, m.0792sml
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.receiving, m.07vr7vf
m.02ht4nn, common.webpage.topic, Tennessee Titans
Tennessee Titans, american_football.football_team.historical_coaching_staff, m.0y7zf7s
Tennessee Titans at San Francisco 49ers, 2009-11-08, american_football.football_game.receiving, m.088x1lm
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.receiving, m.0792zns
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.receiving, m.0792l6y
Tennessee Titans at Chicago Bears, 2008-11-09, american_football.football_game.receiving, m.0793ttd
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.receiving, m.0792t9q
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.receiving, m.0792znd
Tennessee Titans at New York Jets, 2009-09-27, american_football.football_game.receiving, m.07nn1mt
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.receiving, m.07vr7vs
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.receiving, m.098jlll
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.rushing, m.0792r7j
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.receiving, m.07jq8pw
Tennessee Titans at Baltimore Ravens, 2008-10-05, american_football.football_game.receiving, m.0792r3s
Tennessee Titans, american_football.football_team.historical_coaching_staff, m.0hpj72y
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.receiving, m.098jlr1
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.receiving, m.07jq8r6
Tennessee Titans, common.topic.notable_for, g.1257wfnft
Tennessee Titans at Baltimore Ravens, 2008-10-05, american_football.football_game.receiving, m.07920yw
Tennessee Titans, american_football.football_team.historical_coaching_staff, m.0_rd9cq
Tennessee Titans, common.topic.webpage, m.02ht4nn
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.passing, m.07vr7r4
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.rushing, m.0792r5d
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.receiving, m.098jlny
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.receiving, m.07jq905
m.0hpdx4b, american_football.football_historical_coach_position.team, Tennessee Titans
Tennessee Titans at Baltimore Ravens, 2008-10-05, american_football.football_game.receiving, m.07920x1
Ken Whisenhunt, american_football.football_coach.current_team_head_coached, Tennessee Titans
m.0dhtcj1, common.webpage.topic, Tennessee Titans
Tennessee Titans at Indianapolis Colts, 2008-12-28, common.topic.notable_for, g.1257jmky1
Tennessee Titans at Baltimore Ravens, 2008-10-05, american_football.football_game.passing, m.07920tq
Tennessee Titans at Detroit Lions, 2008-11-27, american_football.football_game.receiving, m.0792sm7
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.receiving, m.07jq93z
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.receiving, m.07vr7wt
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.passing, m.07vr7xn
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.receiving, m.0792r9c
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.receiving, m.07vr7t1
Tennessee Titans at Baltimore Ravens, 2008-10-05, american_football.football_game.receiving, m.0792r03
Tennessee Titans, sports.sports_team.previously_known_as, Tennessee Oilers
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.receiving, m.098jlm8
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.rushing, m.0792r5x
Tennessee Titans at Jacksonville Jaguars, 2008-11-16, american_football.football_game.receiving, m.0792nr7
Tennessee Titans, american_football.football_team.historical_coaching_staff, m.051rf13
Tennessee Titans at Baltimore Ravens, 2008-10-05, american_football.football_game.receiving, m.07920y4
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.receiving, m.07jq8rw
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.passing, m.07vr7qg
Tennessee Titans at Indianapolis Colts, 2009-12-06, common.topic.notable_for, g.125715hbw
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.receiving, m.098jlmy
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.passing, m.07jq8vs
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.receiving, m.0792l90
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.season, 2008 NFL season
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.rushing, m.098jlkj
m.0422dwy, common.webpage.topic, Tennessee Titans
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.receiving, m.07vr7td
Tennessee Titans at Baltimore Ravens, 2008-10-05, american_football.football_game.receiving, m.07920z6
Tennessee Titans at San Francisco 49ers, 2009-11-08, american_football.football_game.receiving, m.088x1mm
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.receiving, m.07vr7w3
Tennessee Titans at San Francisco 49ers, 2009-11-08, american_football.football_game.passing, m.088x1tt
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.passing, m.0792l0b
Tennessee Titans, american_football.football_team.conference, American Football Conference
Tennessee Titans at Cincinnati Bengals, 2008-09-14, common.topic.notable_for, g.1258t_3bz
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.rushing, m.098jlk5
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.receiving, m.0792zq_
Tennessee Titans at San Francisco 49ers, 2009-11-08, american_football.football_game.receiving, m.088x1l3
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.passing, m.0792r4f
Tennessee Titans at Baltimore Ravens, 2008-10-05, american_football.football_game.receiving, m.0792r1y
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.receiving, m.0792zph
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.receiving, m.07jq90w
Tennessee Titans at Jacksonville Jaguars, 2008-11-16, american_football.football_game.receiving, m.0792nrn
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.rushing, m.07vr7ry
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.receiving, m.07jq938
Tennessee Titans at Chicago Bears, 2008-11-09, american_football.football_game.receiving, m.0793tsk
Tennessee Titans, common.topic.article, m.07l2x
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.receiving, m.0792zp3
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.passing, m.098jlpl
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.receiving, m.0792zqh
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.passing, m.0792t37
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.receiving, m.0792l8m
m.0y7zf7s, american_football.football_historical_coach_position.team, Tennessee Titans
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.receiving, m.07jq8zw
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.rushing, m.07vr7z3
Tennessee Titans, sports.professional_sports_team.owner_s, Bud Adams
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.rushing, m.098jlkx
m.0_1y4t_, sports.sports_team_coach_tenure.team, Tennessee Titans
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.passing, m.0792zg6
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.receiving, m.098jll7
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.receiving, m.07jq8yq
Tennessee Titans at Detroit Lions, 2008-11-27, american_football.football_game.passing, m.0793yt0
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.receiving, m.0792l6g
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.passing, m.07vr7x4
m.0_1y4t_, sports.sports_team_coach_tenure.coach, Ken Whisenhunt
Tennessee Titans, american_football.football_team.current_head_coach, Ken Whisenhunt
Tennessee Titans, american_football.football_team.historical_coaching_staff, m.0zwcc7t
Tennessee Titans at Baltimore Ravens, 2008-10-05, american_football.football_game.receiving, m.0792r3c
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.rushing, m.07vr7sm
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.passing, m.0792t3r
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.receiving, m.0792zpz
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.receiving, m.0792tcf
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.rushing, m.0792r4y
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.receiving, m.07jq8_j
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.rushing, m.07vr7s8
Tennessee Titans at San Francisco 49ers, 2009-11-08, american_football.football_game.receiving, m.088x1ry
Tennessee Titans at Baltimore Ravens, 2008-10-05, american_football.football_game.receiving, m.07920xf
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.receiving, m.0792l61
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.receiving, m.098jlsf
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.receiving, m.07jq8sk
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.receiving, m.0792tcz
Tennessee Titans, american_football.football_team.historical_coaching_staff, m.0hpdx4b
Tennessee Titans at Baltimore Ravens, 2008-10-05, american_football.football_game.receiving, m.07920yj
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.passing, m.0792zg_
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.rushing, m.07vr7rl
Tennessee Titans, common.topic.notable_types, Professional Sports Team
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.rushing, m.0792t56
Tennessee Titans, american_football.football_team.current_head_coach, Ken Whisenhunt
Tennessee Titans at Baltimore Ravens, 2008-10-05, american_football.football_game.receiving, m.0792r2g
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.receiving, m.07jq8ph
Tennessee Titans at Detroit Lions, 2008-11-27, american_football.football_game.receiving, m.0793yy6
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.rushing, m.07vr7zg
Tennessee Titans, sports.sports_team.sport, American football
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.receiving, m.0792r8c
Tennessee Titans at Detroit Lions, 2008-11-27, american_football.football_game.receiving, m.0793yxs
Tennessee Titans at Detroit Lions, 2008-11-27, american_football.football_game.receiving, m.0792snb
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.receiving, m.0792l4y
Tennessee Titans at San Francisco 49ers, 2009-11-08, american_football.football_game.home_team, San Francisco 49ers
Tennessee Titans, common.topic.image, TennesseeTitans 1000.png
Tennessee Titans at San Francisco 49ers, 2009-11-08, american_football.football_game.receiving, m.088x1pb
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.rushing, m.07vr7y2
m.09wdt34, common.webpage.topic, Tennessee Titans
Tennessee Titans at San Francisco 49ers, 2009-11-08, american_football.football_game.receiving, m.088x1q5
Tennessee Titans at Detroit Lions, 2008-11-27, american_football.football_game.receiving, m.0792snp
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.rushing, m.0792zm5
Tennessee Titans at San Francisco 49ers, 2009-11-08, american_football.football_game.passing, m.088x1g0
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.receiving, m.07jq8y8
Tennessee Titans at New York Jets, 2009-09-27, american_football.football_game.receiving, m.07nn1kr
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.receiving, m.098jlly
m.0zwcc7t, american_football.football_historical_coach_position.team, Tennessee Titans
Tennessee Titans, american_football.football_team.division, AFC South
m.0dhtcj1, common.webpage.resource, Tennessee Titans Memorabilia
Tennessee Titans at Baltimore Ravens, 2008-10-05, american_football.football_game.receiving, m.0792r2z
Tennessee Titans at San Francisco 49ers, 2009-11-08, american_football.football_game.passing, m.088x1sp
Tennessee Titans at San Francisco 49ers, 2009-11-08, american_football.football_game.receiving, m.088x1yj
Tennessee Titans at Pittsburgh Steelers, 2009-09-10, american_football.football_game.receiving, m.07jq8z3
Tennessee Titans at Detroit Lions, 2008-11-27, american_football.football_game.passing, m.0793ytz
Tennessee Titans, common.topic.webpage, m.09wdt34
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.passing, m.0792l0v
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.receiving, m.0792l3t
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.receiving, m.098jls2
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.receiving, m.0792l5l
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.receiving, m.0792l86
Tennessee Titans at Baltimore Ravens, 2008-10-05, american_football.football_game.receiving, m.07920xt
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.season, 2009 NFL season
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.rushing, m.0792r6p
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.receiving, m.07vr7tr
m.051rf13, american_football.football_historical_coach_position.team, Tennessee Titans
Tennessee Titans at Indianapolis Colts, 2009-12-06, american_football.football_game.receiving, m.098jlrd
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.receiving, m.0792rcc
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.receiving, m.0792l7g
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.rushing, m.07vr7zt
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.receiving, m.0792l49
Tennessee Titans at Detroit Lions, 2008-11-27, american_football.football_game.receiving, m.0792spc
Tennessee Titans at New York Jets, 2009-09-27, american_football.football_game.receiving, m.07nn1nk
Tennessee Titans at Detroit Lions, 2008-11-27, american_football.football_game.receiving, m.0793yym
Tennessee Titans at Detroit Lions, 2008-11-27, american_football.football_game.receiving, m.0793yx1
Tennessee Titans at New England Patriots, 2009-10-18, american_football.football_game.rushing, m.07vr7ys
Tennessee Titans at Kansas City Chiefs, 2008-10-19, american_football.football_game.receiving, m.0792rbp
m.0hpj72y, american_football.football_historical_coach_position.team, Tennessee Titans
Tennessee Titans at Detroit Lions, 2008-11-27, american_football.football_game.receiving, m.0793yz4
Tennessee Titans at Indianapolis Colts, 2008-12-28, american_football.football_game.receiving, m.0792tb2
Bud Adams, sports.sports_team_owner.teams_owned, Tennessee Titans

Answer: Ken Whisenhunt