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: Which Zac Efron movie's prequel was High School Musical 2? 
Knowledge Triplets: m.0y6rfmc, film.performance.film, High School Musical 2
m.0y632yp, film.performance.film, High School Musical 2
High School Musical 2, film.film.release_date_s, m.0wyqd0k
High School Musical 2, film.film.starring, m.0y63llc
High School Musical 2, film.film.release_date_s, m.0wyqg33
High School Musical 2, film.film.starring, m.0wyvj68
High School Musical 2, film.film.release_date_s, m.0k1c9k7
m.0wyqbjr, film.film_regional_release_date.film, High School Musical 2
m.0wz33ff, film.film_crew_gig.film, High School Musical 2
m.0y63rvd, film.performance.film, High School Musical 2
High School Musical 2, film.film.film_casting_director, Jeff Johnson
m.0y6qxv_, film.performance.film, High School Musical 2
High School Musical 2, film.film.other_crew, m.0wz34n_
m.0gy_jpj, film.performance.film, High School Musical 2
m.0wyvgqt, film.performance.film, High School Musical 2
m.0wz34js, film.film_crew_gig.film, High School Musical 2
Zac Efron, music.album.artist, Right Here, Right Now
High School Musical 2, film.film.release_date_s, m.0wyqg7y
m.0y6313x, film.performance.film, High School Musical 2
High School Musical 2, film.film.starring, m.0z3_4wq
High School Musical 2, film.film.release_date_s, m.0j585y7
m.0wz34n9, film.film_crew_gig.film, High School Musical 2
m.0wyq9zk, film.film_regional_release_date.film, High School Musical 2
m.0y6rphm, film.performance.film, High School Musical 2
m.0y63my7, film.performance.film, High School Musical 2
m.03js450, film.performance.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y63qzq
Zac Efron, award.award_nominee.award_nominations, m.0z8z2qp
m.0wz33d6, film.film_crew_gig.film, High School Musical 2
Bill Borden, film.producer.film, High School Musical 2
High School Musical 2, film.film.featured_song, Work This Out
High School Musical 2, film.film.starring, m.0y63q80
m.0wz34gv, film.film_crew_gig.film, High School Musical 2
m.0y6rb4s, film.performance.film, High School Musical 2
High School Musical 2, film.film.distributors, m.0hgbx5v
m.0wz34lf, film.film_crew_gig.film, High School Musical 2
High School Musical 3: Senior Year, film.film.sequel, Sharpay's Fabulous Adventure
m.0gz0wnc, film.performance.film, High School Musical 2
m.0y6r042, film.performance.film, High School Musical 2
m.0y6r5dc, film.performance.film, High School Musical 2
m.0wyqc4r, film.film_regional_release_date.film, High School Musical 2
High School Musical 2, film.film.release_date_s, m.0wyqh1j
High School Musical 2, film.film.starring, m.0wyvgqt
Humuhumunukunukuapua'a, film.film_featured_song.featured_in_film, High School Musical 2
High School Musical 2, film.film.starring, m.0gz0mwj
m.0y6r2ny, film.performance.film, High School Musical 2
Zac Efron, award.award_winner.awards_won, m.0z8z1pc
m.0y63q80, film.performance.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y6r2ny
m.0wz34bd, film.film_crew_gig.film, High School Musical 2
Movies, broadcast.genre.content, High School Musical 2
Can I Have This Dance, music.recording.releases, High School Musical 3: Senior Year
High School Musical 2, film.film.starring, m.0y63h5w
m.0y63h5w, film.performance.film, High School Musical 2
High School Musical 2, film.film.starring, m.0gyz28b
m.0gz0ldm, film.performance.film, High School Musical 2
m.0z8z1pc, award.award_honor.honored_for, High School Musical 3: Senior Year
m.0y6r0pb, film.performance.film, High School Musical 2
Zac Efron, award.award_nominee.award_nominations, m.0b3t__5
High School Musical 2, film.film.release_date_s, m.0wyq8t2
m.0p7f8vp, film.film_cut.film, High School Musical 2
m.0j58wmq, film.film_regional_release_date.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y632c4
High School Musical 2, film.film.release_date_s, m.0wyqhjg
Scream, music.recording.releases, High School Musical 3: Senior Year
m.0y6r6x6, film.performance.film, High School Musical 2
Work This Out, film.film_featured_song.featured_in_film, High School Musical 2
m.0y632c4, film.performance.film, High School Musical 2
m.0wyqh76, film.film_regional_release_date.film, High School Musical 2
High School Musical 2, film.film.genre, Comedy
m.0wyqfsb, film.film_regional_release_date.film, High School Musical 2
High School Musical 2, film.film.prequel, High School Musical
High School Musical 2, film.film.starring, m.0y63g_t
High School Musical 2, media_common.netflix_title.netflix_genres, Family Comedies
m.0h3946d, film.performance.film, High School Musical 2
m.0z8_5pc, award.award_nominated_work.award_nominations, High School Musical 3: Senior Year
High School Musical 2, film.film.release_date_s, m.0wyqbzk
m.0y632h7, film.performance.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y63l_n
High School Musical 2, film.film.other_crew, m.0wz34n9
High School Musical 2, film.film.runtime, m.0p7f8vp
m.0hgbx63, film.film_film_distributor_relationship.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y63ggg
High School Musical 2, film.film.other_crew, m.0wz34dw
m.0wyqbzk, film.film_regional_release_date.film, High School Musical 2
United States of America, film.film.country, High School Musical 3: Senior Year
High School Musical 2, film.film.starring, m.0y6rjm1
m.0gyzdgw, film.performance.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y6rb4s
High School Musical 2, film.film.starring, m.0y63jn1
m.0y632py, film.performance.film, High School Musical 2
m.0wz335z, film.film_crew_gig.film, High School Musical 2
m.0y63mqy, film.performance.film, High School Musical 2
m.0y6rc_3, film.performance.film, High School Musical 2
m.0y63rfz, film.performance.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y6qy_3
High School Musical 2, film.film.starring, m.0y631b6
Daniel Aranyo, film.cinematographer.film, High School Musical 2
m.0wyqgy7, film.film_regional_release_date.film, High School Musical 2
High School Musical 2, film.film.featured_song, You Are the Music in Me
The Boys Are Back, music.recording.releases, High School Musical 3: Senior Year
m.0wz33wv, film.film_crew_gig.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y6rmf7
High School Musical 2, film.film.film_series, High School Musical
High School Musical 2, film.film.starring, m.0y63hy4
Kenny Ortega, film.director.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y6rphm
m.0wz34dw, film.film_crew_gig.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y63ltr
Right Here, Right Now, music.recording.releases, High School Musical 3: Senior Year
High School Musical 2, film.film.genre, Backstage Musical
m.0wyq9fm, film.film_regional_release_date.film, High School Musical 2
High School Musical 2, film.film.release_date_s, m.0wyqfxw
m.0y6rn0b, film.performance.film, High School Musical 2
High School Musical, film.film.film_series, High School Musical 3: Senior Year
High School Musical 2, film.film.country, United States of America
Breaking Free (High School Musical), music.recording.artist, Zac Efron
High School Musical 2, film.film.release_date_s, m.0wyq9zk
m.0wyqf0p, film.film_regional_release_date.film, High School Musical 2
m.02vcjkf, film.performance.film, High School Musical 2
m.0y63hy4, film.performance.film, High School Musical 2
m.0y63l_n, film.performance.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y632yp
m.0y63r4g, film.performance.film, High School Musical 2
High School Musical 2, film.film.release_date_s, m.0wyq7rj
High School Musical 2, film.film.starring, m.0y63mqy
High School Musical 2, film.film.starring, m.0y6r5dc
High School Musical 2, film.film.starring, m.0y63m5d
m.0wyq7rj, film.film_regional_release_date.film, High School Musical 2
Seth Flaum, film.editor.film, High School Musical 2
m.0y63pv2, film.performance.film, High School Musical 2
High School Musical 2, film.film.other_crew, m.0wz34js
m.0y63r1v, film.performance.film, High School Musical 2
m.0wz33dr, film.film_crew_gig.film, High School Musical 2
High School Musical 2, film.film.written_by, Peter Barsocchini
m.0y631b6, film.performance.film, High School Musical 2
Zac Efron, music.recording.artist, The Boys Are Back
High School Musical, music.recording.artist, Zac Efron
Don Schain, film.producer.film, High School Musical 2
High School Musical 2, film.film.release_date_s, m.0wyqh76
High School Musical 2, film.film.other_crew, m.0wz33d6
High School Musical 2, film.film.starring, m.0y6q_0h
High School Musical 2, film.film.starring, m.0y6rgfx
m.0b3w_t8, award.award_nominated_work.award_nominations, High School Musical 3: Senior Year
High School Musical 2, film.film.starring, m.0gz0ldm
High School Musical 2, film.film.starring, m.0y633fc
Zac Efron, music.recording.artist, Can I Have This Dance
High School Musical 2, film.film.distributors, m.0hgbx6d
High School Musical 2, film.film.starring, m.0y6313x
m.0wz338s, film.film_crew_gig.film, High School Musical 2
High School Musical 2, film.film.starring, m.0gyzdgw
High School Musical 3: Senior Year, film.film.prequel, High School Musical 2
m.0z8z2qp, award.award_nominated_work.award_nominations, High School Musical 3: Senior Year
m.0y631k9, film.performance.film, High School Musical 2
m.0y6qy_3, film.performance.film, High School Musical 2
High School Musical 2, film.film.directed_by, Kenny Ortega
m.0y632t1, film.performance.film, High School Musical 2
m.0y63n46, film.performance.film, High School Musical 2
High School Musical 2, film.film.language, English Language
m.0y6rmf7, film.performance.film, High School Musical 2
m.0y633fc, film.performance.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y6rdy0
High School Musical 2, film.film.starring, m.0y632h7
High School Musical 2, film.film.release_date_s, m.0wyqf0p
m.0y6rgfx, film.performance.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y6rc_3
m.02vd0zf, film.performance.film, High School Musical 2
High School Musical 2, film.film.genre, Drama
High School Musical 2, film.film.starring, m.0y6qxv_
High School Musical 2, film.film.featured_song, Everyday
High School Musical 2, film.film.other_crew, m.0wz33ff
High School Musical 2, film.film.starring, m.0y6r042
High School Musical 2, film.film.film_set_decoration_by, Ken Kirchner
High School Musical 2, film.film.release_date_s, m.0wyqcgq
m.02vc3dx, film.performance.film, High School Musical 2
High School Musical 2, music.soundtrack.film, High School Musical 2
High School Musical 2, film.film.release_date_s, m.0wyq92f
High School Musical 2, film.film.starring, m.0y63r30
High School Musical 2, film.film.featured_song, g.12391ys8
m.0wyqhjg, film.film_regional_release_date.film, High School Musical 2
High School Musical 2, film.film.sequel, High School Musical 3: Senior Year
High School Musical 2, broadcast.content.genre, The arts
m.0y63qng, film.performance.film, High School Musical 2
m.0y63llc, film.performance.film, High School Musical 2
High School Musical 2, film.film.release_date_s, m.0wyqbjr
High School Musical 2, film.film.release_date_s, m.0wyqgy7
m.04g4mj1, film.performance.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y6rc62
High School Musical 2, broadcast.content.producer, Disney Channel
m.0y6rm04, film.performance.film, High School Musical 2
Zac Efron, music.artist.track, High School Musical
High School Musical 2, film.film.edited_by, Seth Flaum
High School Musical 2, film.film.film_production_design_by, Mark Hofeling
m.0gz1fgw, film.film_cut.film, High School Musical 2
High School Musical 2, film.film.other_crew, m.0wz34lf
High School Musical 2, film.film.film_art_direction_by, Scott Arneman
m.0wyq9tk, film.film_regional_release_date.film, High School Musical 2
High School Musical 2, film.film.distributors, m.0hgbx63
High School Musical 2, film.film.genre, Musical comedy
High School Musical 2, media_common.netflix_title.netflix_genres, Backstage Musical
m.0y63qwd, film.performance.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y632py
m.0wz2h9f, film.performance.film, High School Musical 2
High School Musical 2, film.film.genre, Romance Film
m.0y6rjm1, film.performance.film, High School Musical 2
Sharpay's Fabulous Adventure, film.film.prequel, High School Musical 3: Senior Year
m.0y63ggg, film.performance.film, High School Musical 2
m.0wz3403, film.film_crew_gig.film, High School Musical 2
Zac Efron, music.artist.track, High School Musical
High School Musical 2, film.film.starring, m.0y63r1v
High School Musical 2, film.film.starring, m.0y63qwd
High School Musical: Sing it!, cvg.computer_videogame.prequel, Disney Sing It
High School Musical 2, film.film.starring, m.0y6rfmc
m.03lyytj, film.performance.film, High School Musical 3: Senior Year
High School Musical 2, film.film.starring, m.02vcjkf
High School Musical 2, broadcast.content.genre, TV
High School Musical 2, broadcast.content.genre, Entertainment
m.0y6rc62, film.performance.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y633ts
m.0wyqbbq, film.film_regional_release_date.film, High School Musical 2
m.0y633ts, film.performance.film, High School Musical 2
High School Musical 2, film.film.starring, m.02vd0zf
High School Musical 2, film.film.starring, m.0h3946d
High School Musical 2, film.film.featured_song, You Got It
High School Musical 2, film.film.music, David Nessim Lawrence
High School Musical 2, film.film.release_date_s, m.0wyqc4r
Everyday, film.film_featured_song.featured_in_film, High School Musical 2
High School Musical 2, film.film.other_crew, m.0wz34bd
High School Musical 2, film.film.other_crew, m.0wz34gv
High School Musical 2, film.film.starring, m.0y63n46
High School Musical 2, film.film.starring, m.0y6r0pb
High School Musical 2, film.film.starring, m.0y633hj
High School Musical 2, film.film.release_date_s, m.0wyqbq9
High School Musical 2, film.film.featured_song, What Time Is It?
High School Musical 2, film.film.starring, m.0gy_jpj
m.0wyqg33, film.film_regional_release_date.film, High School Musical 2
High School Musical 2, film.film.film_casting_director, Jason La Padura
m.0z3_4wq, film.performance.film, High School Musical 2
High School Musical 2, film.film.produced_by, Bill Borden
m.0y6r34y, film.performance.film, High School Musical 2
High School Musical 2, film.film.produced_by, Don Schain
High School Musical 2, film.film.release_date_s, m.0wyqfsb
Disney Channel, broadcast.producer.produces, High School Musical 2
m.0y63qzq, film.performance.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y63pv2
High School Musical 2, film.film.starring, m.0y63241
High School Musical 2, film.film.starring, m.02vc3dx
m.0y6q_0h, film.performance.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y63my7
m.0j585y7, film.film_regional_release_date.film, High School Musical 2
Zac Efron, award.award_nomination.award_nominee, m.0z8_5pc
m.0y63ltr, film.performance.film, High School Musical 2
David Nessim Lawrence, film.music_contributor.film, High School Musical 2
m.0y63m5d, film.performance.film, High School Musical 2
m.0wz34n_, film.film_crew_gig.film, High School Musical 2
High School Musical 2, film.film.starring, m.0wz2ffx
High School Musical 2, film.film.costume_design_by, Tom McKinley
High School Musical 2, film.film.starring, m.0y6rn0b
Zac Efron, film.performance.actor, m.03lyytj
m.0wyqdb5, film.film_regional_release_date.film, High School Musical 2
m.0gz0mwj, film.performance.film, High School Musical 2
High School Musical 2, film.film.featured_song, Humuhumunukunukuapua'a
High School Musical 2, film.film.release_date_s, m.0wyq9fm
m.0y6rk_q, film.performance.film, High School Musical 2
High School Musical 2, music.album.releases, High School Musical 2: Non-Stop Dance Party
Fabulous, film.film_featured_song.featured_in_film, High School Musical 2
High School Musical 2, media_common.adapted_work.adaptations, High School Musical: Sing it!
High School Musical 2, broadcast.content.genre, Movies
m.0wyq8mj, film.film_regional_release_date.film, High School Musical 2
High School Musical 2, film.film.release_date_s, m.0j58wmq
m.0hgbx5k, film.film_film_distributor_relationship.film, High School Musical 2
High School Musical 2, film.film.executive_produced_by, Barry Rosenbush
m.0y63g_t, film.performance.film, High School Musical 2
High School Musical 2, film.film.release_date_s, m.0wyqbbq
High School Musical 2, broadcast.content.genre, Film
m.0wyqctl, film.film_regional_release_date.film, High School Musical 2
High School Musical 2, film.film.soundtrack, High School Musical 2
High School Musical 2, film.film.starring, m.0y6rk_q
High School Musical 2, film.film.release_date_s, m.0wyqfjr
m.0wyqbq9, film.film_regional_release_date.film, High School Musical 2
m.0wyqfxw, film.film_regional_release_date.film, High School Musical 2
Barry Rosenbush, film.producer.films_executive_produced, High School Musical 2
High School Musical, film.film.sequel, High School Musical 2
m.0y633hj, film.performance.film, High School Musical 2
High School Musical 2, film.film.distributors, m.0hgbx5k
High School Musical 2, film.film.starring, m.0y63rvd
Zac Efron, award.award_nominee.award_nominations, m.0b3w_t8
High School Musical 2, film.film.starring, m.0y631k9
High School Musical 2, film.film.release_date_s, m.0wyqctl
High School Musical 2, film.film.starring, m.03js450
m.0y63j5h, film.performance.film, High School Musical 2
m.0wyqfjr, film.film_regional_release_date.film, High School Musical 2
High School Musical, film.film_series.films_in_series, High School Musical 2
High School Musical 2, film.film.other_crew, m.0wz33dr
High School Musical 2, film.film.release_date_s, m.0wyq9tk
m.0wz2ffx, film.performance.film, High School Musical 2
High School Musical 2, film.film.cinematography, Daniel Aranyo
High School Musical 2, film.film.genre, Family
High School Musical 2, film.film.starring, m.0y6r4fx
Zac Efron, film.actor.film, m.0jz2cl
High School Musical 2, film.film.genre, Musical Drama
High School Musical 2, film.film.other_crew, m.0wz335z
m.0k1c9k7, film.film_regional_release_date.film, High School Musical 2
m.0y63jn1, film.performance.film, High School Musical 2
Zac Efron, music.artist.track, Breaking Free (High School Musical)
m.0y6r4fx, film.performance.film, High School Musical 2
High School Musical 2, film.film.featured_song, g.122brtjv
m.0hgbx6d, film.film_film_distributor_relationship.film, High School Musical 2
m.0hgbx5v, film.film_film_distributor_relationship.film, High School Musical 2
m.0y63r30, film.performance.film, High School Musical 2
m.0wyqg7y, film.film_regional_release_date.film, High School Musical 2
m.0wyqh1j, film.film_regional_release_date.film, High School Musical 2
High School Musical 2, film.film.starring, m.0y63mfc
High School Musical 2, film.film.starring, m.0y63r4g
High School Musical 2, film.film.starring, m.0y632t1
High School Musical 2, film.film.featured_song, Fabulous
m.0wyqcgq, film.film_regional_release_date.film, High School Musical 2
High School Musical 2, media_common.netflix_title.netflix_genres, Family
High School Musical 2, film.film.starring, m.0y6r6x6
m.0wyq8t2, film.film_regional_release_date.film, High School Musical 2
m.0wyqd0k, film.film_regional_release_date.film, High School Musical 2
High School Musical 2, film.film.starring, m.04g4mj1
High School Musical 2, film.film.other_crew, m.0wz33wv
High School Musical 2, film.film.film_casting_director, Natalie Hart
High School Musical 2, film.film.sequel, High School Musical 3: Senior Year
m.0wz34cq, film.film_crew_gig.film, High School Musical 2
High School Musical 2, film.film.starring, m.0gz0wnc
High School Musical 2, media_common.netflix_title.netflix_genres, Family Drama
High School Musical 2, film.film.starring, m.0wz2h9f
High School Musical 2, film.film.featured_song, g.120jxm9t
High School Musical 2, film.film.featured_song, I Don't Dance
m.0wyq92f, film.film_regional_release_date.film, High School Musical 2
Zac Efron, music.artist.track, Scream
High School Musical 2, film.film.other_crew, m.0wz3403
High School Musical 2, film.film.starring, m.0y63qng
Zac Efron, people.person.nationality, United States of America
High School Musical 2, common.topic.image, hsm2.jpg
High School Musical 2, film.film.release_date_s, m.0wyq8mj
High School Musical 2, film.film.other_crew, m.0wz33c5
m.0b0bqc6, award.award_honor.honored_for, High School Musical 3: Senior Year
High School Musical 2, film.film.starring, m.0y6r34y
High School Musical 2, film.film.starring, m.0y63j5h
High School Musical 2, film.film.other_crew, m.0wz34cq
m.0gyz28b, film.performance.film, High School Musical 2
High School Musical 2, film.film.other_crew, m.0wz338s
m.0wz33c5, film.film_crew_gig.film, High School Musical 2
m.0y6rdy0, film.performance.film, High School Musical 2
High School Musical 2, film.film.runtime, m.0gz1fgw
High School Musical 2, film.film.starring, m.0y63rfz
Zac Efron, award.award_honor.award_winner, m.0b0bqc6
High School Musical: Sing it!, media_common.adaptation.adapted_from, High School Musical 2
High School Musical 2, film.film.starring, m.0y6rm04
m.0b3t__5, award.award_nominated_work.award_nominations, High School Musical 3: Senior Year
m.0y63mfc, film.performance.film, High School Musical 2
m.0y63241, film.performance.film, High School Musical 2
m.0wyvj68, film.performance.film, High School Musical 2
High School Musical 2, film.film.release_date_s, m.0wyqdb5
Peter Barsocchini, film.writer.film, High School Musical 2

Answer: High School Musical 3: Senior Year