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: When did the sports team whose mascot is named Lucky the Leprechaun win their first championship? 
Knowledge Triplets: m.0j2dtls, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0r5drlp
m.0zv066w, sports.sports_team_roster.team, Boston Celtics
Team, rdf-schema#domain, Mascot
Boston Celtics, sports.sports_team.league, m.0crtdcs
Boston Celtics, sports.sports_team.roster, m.0_qy714
Lucky the Leprechaun, common.topic.notable_for, g.1257jmbbb
m.0crtdcs, sports.sports_league_participation.team, Boston Celtics
1963 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
1959 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
m.0_qwy6n, award.award_honor.award_winner, Boston Celtics
Mascot, type.type.domain, Sports
Boston Celtics, sports.sports_team.roster, m.02397wj
Boston Celtics, sports.professional_sports_team.draft_picks, m.05ssdh2
m.0ztw1qz, sports.sports_team_roster.team, Boston Celtics
m.0pd51gh, sports.sports_team_roster.team, Boston Celtics
Lucky the Leprechaun, common.topic.article, m.0jvt57q
m.0j2h1r8, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, award.award_winner.awards_won, m.0_qwyjd
m.0_qxt5p, award.award_honor.award_winner, Boston Celtics
Boston Celtics, basketball.basketball_team.previous_coaches, m.0w2j6hy
m.0ztw1_3, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0r5ds1t
Boston Celtics, sports.professional_sports_team.draft_picks, m.0110q448
m.01148mlh, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, award.award_winner.awards_won, m.0_qwx1_
TD Garden, sports.sports_facility.teams, Boston Celtics
Boston Celtics, basketball.basketball_team.head_coach, Brad Stevens
m.0j2dzwh, sports.sports_team_roster.team, Boston Celtics
1984 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
Boston Celtics, tv.tv_subject.tv_episodes, 1976 NBA Finals Game 3
Mascot, type.type.properties, Team
Boston Celtics, sports.sports_team.roster, m.0j2dtmd
Boston Celtics, sports.sports_team.championships, 1963 NBA Finals
m.0z45_rs, sports.sports_team_roster.team, Boston Celtics
m.0j2dths, sports.sports_team_roster.team, Boston Celtics
m.0k8hh28, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.professional_sports_team.draft_picks, m.0110p_t3
Boston Celtics, award.award_winner.awards_won, m.0_qxt_d
Sports, type.domain.types, Professional Sports Team
Mascot, type.type.expected_by, sports_team_mascot
1981 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
Boston Celtics, sports.sports_team.colors, Green
Boston Celtics, sports.sports_team.roster, m.0pd51gh
Team, type.property.master_property, Team Mascot
m.0_qz5yn, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0sgrygv
Boston Celtics, sports.sports_team.roster, m.0j2qrz4
m.0_qwmq0, award.award_honor.award_winner, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0j2dtf_
Boston Celtics, sports.sports_team.roster, m.0z3ztq1
Boston Celtics, sports.sports_team.colors, Black
m.0_th72d, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.coaches, m.0w3_qv3
m.0k5y550, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.professional_sports_team.draft_picks, m.0w3wn11
m.0j2qrz4, sports.sports_team_roster.team, Boston Celtics
m.0w3_qv3, sports.sports_team_coach_tenure.coach, Brad Stevens
Boston Celtics, sports.sports_team.championships, 1962 NBA Finals
Boston Celtics, sports.professional_sports_team.draft_picks, m.04_nf_j
Mascot, type.type.expected_by, Team Mascot
m.0k8h69v, sports.sports_team_roster.team, Boston Celtics
m.04_nfhq, sports.sports_league_draft_pick.team, Boston Celtics
Brad Stevens, sports.sports_team_coach.sports_coached, Basketball
Mascot, freebase.type_profile.equivalent_topic, Mascot
Boston Celtics, sports.sports_team.roster, m.0n4pnkt
m.011y25qz, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0n60lgf
m.0fq7jy2, sports.sports_team_roster.team, Boston Celtics
m.0wp8ltr, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.championships, 1966 NBA Finals
Boston Celtics, tv.tv_subject.tv_episodes, 1976 NBA Finals Game 5
Boston Celtics, sports.sports_team.roster, m.0115xf8p
Boston Celtics, sports.sports_team.roster, m.0n9gs9q
m.04_ngyw, sports.sports_league_draft_pick.team, Boston Celtics
Mascot, freebase.documented_object.documentation, m.02ht4bx
Boston Celtics, common.topic.notable_types, Professional Sports Team
Team Mascot, rdf-schema#range, Mascot
Boston Celtics, tv.tv_subject.tv_episodes, 1974 NBA Finals Game 3
Boston Celtics, sports.sports_team.roster, m.0w7dhrf
Topic, freebase.type_profile.published, Published
Mascot, freebase.type_profile.strict_included_types, Topic
Eastern Conference, sports.sports_league.teams, m.0crtdcs
Boston Celtics, tv.tv_subject.tv_episodes, 1976 NBA Finals Game 6
Boston Celtics, sports.sports_team.roster, m.05yr4cz
Boston Celtics, sports.sports_team.roster, m.0j2dtls
Boston Celtics, sports.sports_team.roster, m.0z4tlyt
m.0n9gsbf, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0z5k297
m.02397wj, sports.sports_team_roster.team, Boston Celtics
m.0113ztjw, sports.sports_team_roster.team, Boston Celtics
m.0_qwx1_, award.award_honor.award_winner, Boston Celtics
Boston Celtics, sports.professional_sports_team.draft_picks, m.04_byx8
Boston Celtics, sports.sports_team.roster, m.0zv1l6n
Boston Celtics, sports.sports_team.roster, m.0_4wx6j
Boston Celtics, sports.sports_team.championships, 2008 NBA Finals
Boston Celtics, sports.professional_sports_team.draft_picks, m.04_bzhk
Boston Celtics, award.award_winner.awards_won, m.0_qwy8c
Professional Sports Team, freebase.type_profile.strict_included_types, Topic
Boston Celtics, sports.sports_team.championships, 1986 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0z4403l
m.0k6bgj5, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.051r766
1966 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
m.0_qwylx, award.award_honor.award_winner, Boston Celtics
m.04_byx8, sports.sports_league_draft_pick.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0n9gsbf
Boston Celtics, award.award_winner.awards_won, m.0_qwylx
m.0w2s9yt, sports.sports_team_roster.team, Boston Celtics
m.0_c3znb, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0k2pqbc
Boston Celtics, sports.sports_team.roster, m.0j2dzwh
m.0115xf8p, sports.sports_team_roster.team, Boston Celtics
Sports, type.domain.types, Mascot
m.0qzlbgy, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0wccc30
Eastern Conference, basketball.basketball_conference.divisions, Atlantic Division
Boston Celtics, award.award_winner.awards_won, m.0_qwmq0
Atlantic Division, basketball.basketball_division.conference, Eastern Conference
m.0j2dtm7, sports.sports_team_roster.team, Boston Celtics
m.08tngmb, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.03h95d7
m.0wb745r, sports.sports_team_roster.team, Boston Celtics
m.0w7psvt, sports.sports_team_roster.team, Boston Celtics
m.051r766, sports.sports_team_roster.team, Boston Celtics
m.0_qwy8c, award.award_honor.award_winner, Boston Celtics
Boston Celtics, sports.sports_team.championships, 1968 NBA Finals
Boston Celtics, sports.sports_team.championships, 1959 NBA Finals
Boston Celtics, basketball.basketball_team.conference, Eastern Conference
m.0w_jqnb, sports.team_venue_relationship.venue, TD Garden
Lucky the Leprechaun, sports.mascot.team, Boston Celtics
m.0j2dtf_, sports.sports_team_roster.team, Boston Celtics
m.011x6hjb, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.championships, 1974 NBA Finals
Boston Celtics, sports.professional_sports_team.draft_picks, m.04d1zj6
Boston Celtics, sports.sports_team.roster, m.0k5y550
1957 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
m.05ssdk5, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, award.award_winner.awards_won, m.0_qxt5p
m.0k2plv9, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0n4hr_g
Boston Celtics, sports.sports_team.roster, m.0k8hcr4
Boston Celtics, sports.sports_team.roster, m.05hy04s
m.0yx5c6w, award.award_nomination.award_nominee, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0wp8ltr
Boston Celtics, sports.sports_team.roster, m.0w7pb_7
Boston Celtics, sports.sports_team.location, Boston
Boston Celtics, basketball.basketball_team.division, Atlantic Division
m.0_4wx6j, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0k8hh28
1965 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
Boston Celtics, award.award_winner.awards_won, m.0_qxt8j
m.0113ywh7, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, tv.tv_subject.tv_episodes, 1974 NBA Finals Game 5
Mascot, freebase.type_hints.included_types, Topic
m.0_qxt8j, award.award_honor.award_winner, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0j2dtm7
Boston Celtics, sports.sports_team.roster, m.0j2n1tp
Boston Celtics, sports.professional_sports_team.draft_picks, m.04_ngyc
Boston Celtics, sports.sports_team.roster, m.0k8h69v
Boston Celtics, sports.sports_team.roster, m.0j2h1r8
Boston Celtics, sports.sports_team.arena_stadium, TD Garden
Boston Celtics, sports.sports_team.championships, 1961 NBA Finals
Boston Celtics, sports.sports_team.roster, m.011w_hdh
Boston Celtics, tv.tv_subject.tv_episodes, 1974 NBA Finals Game 2
m.0z43nms, award.award_nomination.award_nominee, Boston Celtics
m.0r5ds1t, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.08tngmb
m.0_qxt49, award.award_honor.award_winner, Boston Celtics
Boston Celtics, sports.sports_team.championships, 1969 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0zw_ktw
Lucky the Leprechaun, common.topic.image, Lucky-The-Leprechaun.jpg
Professional Sports Team, type.type.domain, Sports
m.0j2dtm2, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0k2pdrr
Boston Celtics, sports.sports_team.roster, m.0k2_4y3
m.0110p_t3, sports.sports_league_draft_pick.team, Boston Celtics
Boston Celtics, award.award_winner.awards_won, m.0_qwykr
Boston Celtics, tv.tv_subject.tv_episodes, 1976 NBA Finals Game 1
Boston Celtics, sports.sports_team.roster, m.0w2s9yt
m.0j2dtmd, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.professional_sports_team.draft_picks, m.02nqx4h
m.0pd51c6, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.professional_sports_team.draft_picks, m.05hy1fr
m.0gcl47r, film.personal_film_appearance.person, Boston Celtics
m.0w_jqnb, sports.team_venue_relationship.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0_6y7kr
m.0k2_4y3, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.team_mascot, Lucky the Leprechaun
Boston Celtics, sports.professional_sports_team.draft_picks, m.04_nfhq
m.0n4hr_g, sports.sports_team_roster.team, Boston Celtics
Lucky-The-Leprechaun.jpg, common.image.appears_in_topic_gallery, Lucky the Leprechaun
Boston Celtics, sports.sports_team.roster, m.0ndtw33
m.02nqxf1, sports.sports_league_draft_pick.team, Boston Celtics
m.0sgrygv, sports.sports_team_roster.team, Boston Celtics
m.02396wx, sports.sports_team_roster.team, Boston Celtics
m.0_qwykr, award.award_honor.award_winner, Boston Celtics
m.03h95d7, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.venue, m.0wz1_wj
m.0crt3m_, sports.sports_league_participation.team, Boston Celtics
m.0z3ztq1, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.championships, 1984 NBA Finals
m.0k8hkhn, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.championships, 1976 NBA Finals
m.0_qwyjd, award.award_honor.award_winner, Boston Celtics
m.0k8hcr4, sports.sports_team_roster.team, Boston Celtics
m.04_ngyc, sports.sports_league_draft_pick.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0fq7jy2
m.0_qy714, sports.sports_team_roster.team, Boston Celtics
m.0zw_ktw, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.professional_sports_team.draft_picks, m.04_ngyw
Boston Celtics, sports.sports_team.venue, m.0w_jqnb
Boston Celtics, award.award_winner.awards_won, m.0_qwy6n
Boston Celtics, sports.sports_team.colors, White
Boston Celtics, sports.sports_team.roster, m.0kjrh8t
m.0_qxt92, award.award_honor.award_winner, Boston Celtics
Boston Celtics, tv.tv_subject.tv_episodes, 1974 NBA Finals Game 6
Boston Celtics, sports.sports_team.roster, m.0r62b6w
Boston, sports.sports_team_location.teams, Boston Celtics
m.0z4tlyt, sports.sports_team_roster.team, Boston Celtics
m.0_qwxb8, award.award_honor.award_winner, Boston Celtics
m.0_qxftc, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.04mt_wf
Team Mascot, type.property.expected_type, Mascot
m.0kjrh8t, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0pd51c6
m.0k2pdrr, sports.sports_team_roster.team, Boston Celtics
m.0w7dhrf, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0_qysl7
m.05hy1fr, sports.sports_league_draft_pick.team, Boston Celtics
m.0wb6zc8, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.coaches, m.0w1g5hx
Team, type.property.schema, Mascot
m.0n4hs8t, sports.sports_team_roster.team, Boston Celtics
Team Mascot, owl#inverseOf, Team
Boston Celtics, tv.tv_subject.tv_episodes, 1976 NBA Finals Game 4
Boston Celtics, sports.sports_team.roster, m.0j2dths
m.0_qwpgd, award.award_honor.award_winner, Boston Celtics
m.0w3_qv3, sports.sports_team_coach_tenure.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0sxfyw9
m.0w7pb_7, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.011w_f9t
m.05yr4cz, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.championships, 1964 NBA Finals
Boston Celtics, award.award_winner.awards_won, m.0_qwxb8
m.04_nf_j, sports.sports_league_draft_pick.team, Boston Celtics
Boston Celtics, sports.sports_team.colors, Buff
m.0z43hm7, award.award_nomination.award_nominee, Boston Celtics
Boston Celtics, sports.professional_sports_team.draft_picks, m.04_ng0n
m.04d1zj6, sports.sports_league_draft_pick.team, Boston Celtics
m.0ztz0ph, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0w7qk0x
m.0_qysl7, sports.sports_team_roster.team, Boston Celtics
m.0z4403l, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_championship_event.champion, 1957 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0_c3znb
m.0n9gs9q, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, award.award_winner.awards_won, m.0_qxt92
Boston Celtics, sports.sports_team.roster, m.0wb745r
Boston Celtics, tv.tv_subject.tv_programs, NBA Finals
Boston Celtics, sports.sports_team.roster, m.0ztw1qz
1969 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
Brad Stevens, sports.sports_team_coach.teams_coached, m.0w3_qv3
Boston Celtics, sports.sports_team.roster, m.0j2dtm2
m.0_y32g5, sports.sports_team_roster.team, Boston Celtics
1968 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
m.0_qxtb9, award.award_honor.award_winner, Boston Celtics
m.0k2pqbc, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0z3zm63
Boston Celtics, award.award_winner.awards_won, m.0_qrm59
m.0n4hsdz, sports.sports_team_roster.team, Boston Celtics
m.0w7qk0x, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.011x6hjb
m.0r5drlp, sports.sports_team_roster.team, Boston Celtics
m.0wccc30, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0_qz6j0
Boston Celtics, sports.sports_team.roster, m.0z46cvj
Boston Celtics, tv.tv_subject.tv_episodes, 1974 NBA Finals Game 7
Boston Celtics, sports.sports_team.roster, m.0113ywh7
Boston Celtics, sports.sports_team.roster, m.0n60lxj
m.0wz1_wj, sports.team_venue_relationship.venue, XL Center
m.0j2n1tp, sports.sports_team_roster.team, Boston Celtics
m.0k5jgfm, sports.sports_team_roster.team, Boston Celtics
m.0_qz550, sports.sports_team_roster.team, Boston Celtics
m.0ztygd7, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0_th72d
1976 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0k8hkhn
Boston Celtics, sports.sports_team.championships, 1957 NBA Finals
Wyc Grousbeck, sports.sports_team_owner.teams_owned, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0w7q4pg
m.0sxfyw9, sports.sports_team_roster.team, Boston Celtics
m.0_qz6j0, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0z45_rs
1986 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
Boston Celtics, sports.sports_team.sport, Basketball
Boston Celtics, sports.sports_team.roster, m.0_qz550
m.0110pz2r, sports.sports_team_roster.team, Boston Celtics
m.04_ng0n, sports.sports_league_draft_pick.team, Boston Celtics
Boston Celtics, common.topic.article, m.0bwjv
m.011w_hdh, sports.sports_team_roster.team, Boston Celtics
m.04_ng0s, sports.sports_league_draft_pick.team, Boston Celtics
Boston Celtics, sports.sports_team.arena_stadium, XL Center
Boston Celtics, sports.sports_team.roster, m.0n4hsdz
Boston Celtics, sports.sports_team.roster, m.0110pz2r
1962 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
Boston Celtics, sports.professional_sports_team.draft_picks, m.02nqxf1
m.0_qrm59, award.award_honor.award_winner, Boston Celtics
Mascot, common.topic.article, m.02ht4bx
Boston Celtics, sports.sports_team.colors, Gold
Boston Celtics, sports.sports_team.roster, m.01148mlh
Boston Celtics, sports.sports_team.roster, m.011y3d1_
m.0n4pnkt, sports.sports_team_roster.team, Boston Celtics
m.0_qxqdw, award.award_honor.award_winner, Boston Celtics
XL Center, sports.sports_facility.teams, Boston Celtics
Lucky the Leprechaun, common.topic.notable_types, Mascot
Boston Celtics, tv.tv_subject.tv_episodes, 1976 NBA Finals Game 2
Boston Celtics, sports.professional_sports_team.owner_s, Wyc Grousbeck
Boston Celtics, award.award_winner.awards_won, m.0_qxqdw
m.0n60lxj, sports.sports_team_roster.team, Boston Celtics
Lucky the Leprechaun, sports.sports_team.team_mascot, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0j2dtly
Boston Celtics, award.award_winner.awards_won, m.0_qxt49
Boston Celtics, sports.sports_team.roster, m.0113ztjw
Boston Celtics, sports.sports_team.roster, m.0_qz5yn
m.0jvt57q, common.document.content, m.0jvt57f
Brad Stevens, basketball.basketball_coach.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0ztz0ph
Boston Celtics, sports.sports_team.roster, m.0r91kbr
Boston Celtics, sports.sports_team.championships, 1981 NBA Finals
m.05hy04s, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.league, m.0crt3m_
m.011w_f9t, sports.sports_team_roster.team, Boston Celtics
1964 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0j2dtlm
m.0w1g5hx, sports.sports_team_coach_tenure.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0zv066w
m.0z3zm63, sports.sports_team_roster.team, Boston Celtics
Eastern Conference, basketball.basketball_conference.teams, Boston Celtics
m.0n60lgf, sports.sports_team_roster.team, Boston Celtics
m.0110q448, sports.sports_league_draft_pick.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.05ssdk5
m.0j2dtly, sports.sports_team_roster.team, Boston Celtics
m.02nqx4h, sports.sports_league_draft_pick.team, Boston Celtics
m.0wz1_wj, sports.team_venue_relationship.team, Boston Celtics
m.0_6y7kr, sports.sports_team_roster.team, Boston Celtics
NBA Finals, tv.tv_program.subjects, Boston Celtics
Boston Celtics, sports.sports_team.championships, 1965 NBA Finals
Boston Celtics, sports.sports_team.championships, 1960 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0k6bgj5
Boston Celtics, common.topic.webpage, m.04228m4
m.0w3wn11, sports.sports_league_draft_pick.team, Boston Celtics
2008 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.02396wx
Boston Celtics, sports.professional_sports_team.draft_picks, m.04_ng0s
m.04_bzhk, sports.sports_league_draft_pick.team, Boston Celtics
m.07ng6g6, base.ontologies.ontology_instance_mapping.freebase_topic, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0wb6zc8
m.0z5k297, sports.sports_team_roster.team, Boston Celtics
Mascot, freebase.type_profile.kind, Title
Boston Celtics, sports.sports_team.roster, m.0ztygd7
1960 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0n4hs8t
Boston Celtics, sports.sports_team.roster, m.0qzlbgy
m.0w310mt, sports.sports_team_roster.team, Boston Celtics
1961 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
m.0zv1l6n, sports.sports_team_roster.team, Boston Celtics
m.04228m4, common.webpage.topic, Boston Celtics
Basketball, sports.sport.team_coaches, Brad Stevens
Boston Celtics, award.award_winner.awards_won, m.0z43nq2
Boston Celtics, sports.sports_team.roster, m.0_qxftc
Boston Celtics, sports.sports_team.roster, m.011y25qz
m.04mt_wf, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0w7psvt
Lucky-The-Leprechaun.jpg, common.image.size, m.0kksz7
Mascot, freebase.type_profile.published, Published
1974 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
m.0j2dtlm, sports.sports_team_roster.team, Boston Celtics
m.0ndtw33, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, award.award_winner.awards_won, m.0_qwpgd
Professional Sports Team, freebase.type_hints.included_types, Topic
m.05ssdh2, sports.sports_league_draft_pick.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0_y32g5
m.0r91kbr, sports.sports_team_roster.team, Boston Celtics
Atlantic Division, basketball.basketball_division.teams, Boston Celtics
m.0crtdcs, sports.sports_league_participation.league, Eastern Conference
Team Mascot, type.property.reverse_property, Team
m.011y3d1_, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0k5jgfm
Boston Celtics, sports.sports_team.roster, m.0w310mt
m.0r62b6w, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0k2plv9
m.0z46cvj, sports.sports_team_roster.team, Boston Celtics
m.0_qxt_d, award.award_honor.award_winner, Boston Celtics
m.0z43nq2, award.award_honor.award_winner, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0ztw1_3
Boston Celtics, award.award_winner.awards_won, m.0_qxtb9
m.0w7q4pg, sports.sports_team_roster.team, Boston Celtics

Answer: 1957 NBA Finals