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 boston celtics win their first championship? 
Knowledge Triplets: Boston Celtics, sports.sports_team.roster, m.0j2h1r8
1957 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
m.0w310mt, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.03h95d7
The NBA Finals, sports.sports_championship.events, 1969 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0_y32g5
1976 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
Boston Celtics, sports.sports_team.roster, m.0k5y550
1965 NBA Finals, common.topic.notable_for, g.1255p7x69
m.0wb745r, sports.sports_team_roster.team, Boston Celtics
The NBA Finals, sports.sports_championship.events, 1966 NBA Finals
The NBA Finals, sports.sports_championship.events, 1976 NBA Finals
Boston Celtics, award.award_winner.awards_won, m.0_qxt92
m.04228m4, common.webpage.topic, Boston Celtics
1986 NBA Finals, common.topic.article, m.08x9wk
Boston Celtics, tv.tv_subject.tv_episodes, 1976 NBA Finals Game 5
Boston Celtics, sports.sports_team.roster, m.0r5drlp
1961 NBA Finals, common.topic.notable_for, g.125fg41zl
Boston Celtics, sports.sports_team.roster, m.0w7qk0x
Boston Celtics, award.award_winner.awards_won, m.0_qwykr
Boston Celtics, sports.sports_team.roster, m.0wccc30
Boston Celtics, sports.sports_team.roster, m.0_4wx6j
m.0115xf8p, sports.sports_team_roster.team, Boston Celtics
1964 NBA Finals, sports.sports_championship_event.season, 1963–64 NBA season
m.0n4hs8t, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0110pz2r
m.0k8hcr4, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0113ywh7
Boston Celtics, sports.sports_team.roster, m.05yr4cz
Boston Celtics, sports.sports_team.coaches, m.0w3_qv3
Boston Celtics, award.award_winner.awards_won, m.0_qrm59
1966 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0sgrygv
m.08tngmb, sports.sports_team_roster.team, Boston Celtics
1962 NBA Finals, common.topic.article, m.0cs2f9
1959 NBA Finals, common.topic.article, m.0cs2j1
Boston Celtics, sports.sports_team.roster, m.0r5ds1t
m.0k5y550, sports.sports_team_roster.team, Boston Celtics
m.0_qwy8c, award.award_honor.award_winner, Boston Celtics
1968 NBA Finals, common.topic.article, m.0cs227
1969 NBA Finals, common.topic.notable_for, g.1259hmn9h
1961 NBA Finals, sports.sports_championship_event.runner_up, St. Louis Hawks
1964 NBA Finals, sports.sports_championship_event.runner_up, Golden State Warriors
1975–76 NBA season, sports.sports_league_season.championship, 1976 NBA Finals
m.05hy04s, sports.sports_team_roster.team, Boston Celtics
1963 NBA Finals, sports.sports_championship_event.season, 1962–63 NBA season
m.01148mlh, sports.sports_team_roster.team, Boston Celtics
1960 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
m.0_qxtb9, award.award_honor.award_winner, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0_qxftc
m.0_qxt49, award.award_honor.award_winner, Boston Celtics
m.0r91kbr, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0w310mt
1986 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
1964 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
m.0k8hh28, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0_qz5yn
2011 Stanley Cup Finals, sports.sports_championship_event.champion, Boston Bruins
Boston Celtics, sports.sports_team.roster, m.0qzlbgy
Boston Celtics, sports.sports_team.roster, m.0w2s9yt
Boston Celtics, sports.sports_team.championships, 1969 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0n4hs8t
Boston Celtics, sports.sports_team.roster, m.0n9gsbf
Boston Celtics, sports.sports_team.colors, Black
1969 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0z4403l
m.011w_f9t, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.011y25qz
Boston Celtics, sports.sports_team.championships, 1981 NBA Finals
Boston Celtics, sports.sports_team.roster, m.04mt_wf
1964 NBA Finals, common.topic.article, m.0cs27r
Boston Celtics, sports.sports_team.roster, m.0_c3znb
1976 NBA Finals, common.topic.article, m.09l8zt
Boston Celtics, sports.sports_team.arena_stadium, TD Garden
1961 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
Boston Bruins, sports.sports_team.championships, 2011 Stanley Cup Finals
1957 NBA Finals, common.topic.article, m.0cs2n5
1957 NBA Finals, common.topic.notable_for, g.125906rkn
m.0_qwx1_, award.award_honor.award_winner, Boston Celtics
1962 NBA Finals, common.topic.notable_types, Sports League Championship Event
m.0zv066w, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.051r766
Boston Celtics, award.award_winner.awards_won, m.0_qwx1_
NBA Finals, tv.tv_program.subjects, Boston Celtics
Boston Celtics, sports.sports_team.league, m.0crtdcs
Boston Celtics, sports.sports_team.championships, 1963 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0j2dtly
Boston Celtics, sports.sports_team.championships, 1968 NBA Finals
The NBA Finals, sports.sports_championship.events, 1962 NBA Finals
Boston Celtics, common.topic.article, m.0bwjv
m.0_6y7kr, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0j2n1tp
Boston Celtics, basketball.basketball_team.division, Atlantic Division
Boston Celtics, sports.sports_team.coaches, m.0w1g5hx
Boston Celtics, sports.sports_team.roster, m.0wp8ltr
1964–65 NBA season, sports.sports_league_season.championship, 1965 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0k5jgfm
1965 NBA Finals, common.topic.article, m.0cs26c
1968 NBA Finals, sports.sports_championship_event.runner_up, Los Angeles Lakers
1974 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
m.0z4403l, sports.sports_team_roster.team, Boston Celtics
m.0_qrm59, award.award_honor.award_winner, Boston Celtics
m.0r5drlp, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0z3ztq1
1981 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
m.0j2dtm2, sports.sports_team_roster.team, Boston Celtics
1984 NBA Finals, sports.sports_championship_event.season, 1983–84 NBA season
m.0r5ds1t, sports.sports_team_roster.team, Boston Celtics
1961 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
Boston Celtics, award.award_nominee.award_nominations, m.0z43nms
Boston Celtics, common.topic.notable_types, Professional Sports Team
1959 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
m.0_qwpgd, award.award_honor.award_winner, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0n4hsdz
Boston Celtics, sports.sports_team.roster, m.011w_f9t
1981 NBA Finals, common.topic.article, m.08x9_0
Boston Celtics, award.award_winner.awards_won, m.0_qwylx
1962–63 NBA season, sports.sports_league_season.championship, 1963 NBA Finals
m.0_qwyjd, award.award_honor.award_winner, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0z4tlyt
Boston Celtics, sports.sports_team.roster, m.011y3d1_
m.0z43hm7, award.award_nomination.award_nominee, Boston Celtics
Boston Celtics, sports.sports_team.venue, m.0w_jqnb
The NBA Finals, sports.sports_championship.events, 1960 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0zv1l6n
Boston Celtics, sports.sports_team.championships, 1965 NBA Finals
Boston Celtics, sports.sports_team.championships, 1974 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0j2dtf_
1974 NBA Finals, common.topic.notable_for, g.1254xjkz8
m.0crt3m_, sports.sports_league_participation.team, Boston Celtics
m.011y25qz, sports.sports_team_roster.team, Boston Celtics
m.0pd51gh, sports.sports_team_roster.team, Boston Celtics
1963 NBA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, sports.sports_team.roster, m.0_th72d
1957 NBA Finals, common.topic.notable_types, Sports League Championship Event
1986 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1986 NBA Finals, sports.sports_championship_event.season, 1985–86 NBA season
Boston Celtics, award.award_nominee.award_nominations, m.0yx5c6w
Boston Celtics, sports.sports_team.sport, Basketball
Boston Celtics, sports.professional_sports_team.owner_s, Wyc Grousbeck
Boston Celtics, sports.sports_team.championships, 1960 NBA Finals
m.0crtdcs, sports.sports_league_participation.team, Boston Celtics
Boston Celtics, sports.sports_team.arena_stadium, XL Center
m.0z43nms, award.award_nomination.award_nominee, Boston Celtics
1984 NBA Finals, common.topic.notable_for, g.1257cf2pg
m.0j2dtm7, sports.sports_team_roster.team, Boston Celtics
1976 NBA Finals, common.topic.notable_for, g.125b1mypx
Boston Celtics, sports.sports_team.venue, m.0wz1_wj
Boston Celtics, sports.sports_team.championships, 1966 NBA Finals
Boston Celtics, sports.sports_team.roster, m.02397wj
m.0wccc30, sports.sports_team_roster.team, Boston Celtics
1983–84 NBA season, sports.sports_league_season.championship, 1984 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0pd51c6
Boston Celtics, award.award_winner.awards_won, m.0_qwyjd
Boston Celtics, sports.sports_team.colors, Gold
m.0_qy714, sports.sports_team_roster.team, Boston Celtics
The NBA Finals, sports.sports_championship.events, 1957 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0r62b6w
The NBA Finals, sports.sports_championship.events, 1964 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0ztygd7
1960 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
Boston Celtics, sports.sports_team.championships, 1961 NBA Finals
m.0113ztjw, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_championship_event.champion, 1957 NBA Finals
The NBA Finals, sports.sports_championship.events, 1974 NBA Finals
1965 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
Boston Celtics, award.award_winner.awards_won, m.0_qxt8j
m.0_qwxb8, award.award_honor.award_winner, Boston Celtics
Boston Celtics, award.award_winner.awards_won, m.0_qxt_d
1966 NBA Finals, sports.sports_championship_event.season, 1965–66 NBA season
m.0_qxt5p, award.award_honor.award_winner, Boston Celtics
The NBA Finals, sports.sports_championship.events, 1965 NBA Finals
1969 NBA Finals, common.topic.article, m.08dxfy
Boston Celtics, sports.sports_team.roster, m.0r91kbr
Boston Celtics, sports.sports_team.roster, m.0j2dtlm
Boston Celtics, sports.sports_team.roster, m.0zw_ktw
1960 NBA Finals, common.topic.notable_for, g.1259ftml5
Boston Celtics, sports.sports_team.championships, 1986 NBA Finals
1969 NBA Finals, sports.sports_championship_event.season, 1968–69 NBA season
Boston Celtics, sports.sports_team.roster, m.0w7pb_7
1980–81 NBA season, sports.sports_league_season.championship, 1981 NBA Finals
1961 NBA Finals, common.topic.notable_types, Sports League Championship Event
1984 NBA Finals, common.topic.article, m.08x9xz
The NBA Finals, sports.sports_championship.events, 1961 NBA Finals
m.05yr4cz, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0w7q4pg
1964 NBA Finals, common.topic.notable_for, g.1255kr8yz
m.0113ywh7, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.colors, Buff
Boston Celtics, sports.sports_team.league, m.0crt3m_
Boston Celtics, basketball.basketball_team.previous_coaches, m.0w2j6hy
m.0pd51c6, sports.sports_team_roster.team, Boston Celtics
1961 NBA Finals, sports.sports_championship_event.season, 1960–61 NBA season
The NBA Finals, sports.sports_championship.events, 1968 NBA Finals
1965 NBA Finals, sports.sports_championship_event.runner_up, Los Angeles Lakers
The NBA Finals, sports.sports_championship.events, 1984 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0fq7jy2
1966 NBA Finals, sports.sports_championship_event.runner_up, Los Angeles Lakers
1984 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1966 NBA Finals, common.topic.notable_types, Sports League Championship Event
1968 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
m.02397wj, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0n60lxj
1957 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
Boston Celtics, basketball.basketball_team.head_coach, Brad Stevens
Boston Celtics, sports.sports_team.roster, m.0k6bgj5
1963 NBA Finals, common.topic.notable_for, g.1258cg_6y
Boston Celtics, sports.sports_team.roster, m.0wb745r
Boston Celtics, tv.tv_subject.tv_episodes, 1974 NBA Finals Game 5
Brad Stevens, basketball.basketball_coach.team, Boston Celtics
Boston Celtics, tv.tv_subject.tv_episodes, 1974 NBA Finals Game 7
m.0_qwmq0, award.award_honor.award_winner, Boston Celtics
Boston Celtics, tv.tv_subject.tv_programs, NBA Finals
1968–69 NBA season, sports.sports_league_season.championship, 1969 NBA Finals
1974 NBA Finals, sports.sports_championship_event.runner_up, Milwaukee Bucks
1962 NBA Finals, sports.sports_championship_event.runner_up, Los Angeles Lakers
Boston Celtics, sports.sports_team.roster, m.0j2dtmd
Boston Celtics, award.award_winner.awards_won, m.0z43nq2
Boston Celtics, sports.sports_team.roster, m.0k8hh28
1974 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
Boston Celtics, award.award_winner.awards_won, m.0_qxt49
Boston Celtics, sports.sports_team.roster, m.05hy04s
1962 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
Boston Celtics, sports.sports_team.championships, 1964 NBA Finals
The NBA Finals, sports.sports_championship.events, 1963 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0ndtw33
Boston Celtics, sports.sports_team.roster, m.0n9gs9q
Boston Celtics, award.award_winner.awards_won, m.0_qwxb8
Boston Celtics, sports.sports_team.roster, m.0z46cvj
Boston Celtics, sports.sports_team.roster, m.0j2dths
Boston Celtics, sports.sports_team.roster, m.01148mlh
Boston Celtics, sports.sports_team.roster, m.0z45_rs
Boston Celtics, sports.sports_team.roster, m.0_qz6j0
m.0_qxt8j, award.award_honor.award_winner, Boston Celtics
The NBA Finals, sports.sports_championship.events, 1959 NBA Finals
Boston Celtics, sports.sports_team.colors, White
m.04mt_wf, sports.sports_team_roster.team, Boston Celtics
1981 NBA Finals, common.topic.notable_for, g.125fkyb2k
Boston Celtics, sports.sports_team.championships, 1962 NBA Finals
Boston Celtics, sports.sports_team.location, Boston
Boston Celtics, sports.sports_team.roster, m.0j2dtm7
1981 NBA Finals, sports.sports_championship_event.season, 1980–81 NBA season
m.0z43nq2, award.award_honor.award_winner, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0pd51gh
Boston Celtics, sports.sports_team.roster, m.0k2pqbc
Boston Celtics, sports.sports_team.colors, Green
Boston Celtics, basketball.basketball_team.conference, Eastern Conference
Boston Celtics, sports.sports_team.roster, m.0z3zm63
1959 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
m.0_qxt92, award.award_honor.award_winner, Boston Celtics
m.0n9gsbf, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0w7psvt
m.05ssdk5, sports.sports_team_roster.team, Boston Celtics
m.0_qxqdw, award.award_honor.award_winner, Boston Celtics
1964 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1974 NBA Finals, sports.sports_championship_event.season, 1973–74 NBA season
1959 NBA Finals, sports.sports_championship_event.runner_up, Los Angeles Lakers
Boston Celtics, sports.sports_team.roster, m.0j2dzwh
Boston Celtics, sports.sports_team.roster, m.0n4pnkt
Atlantic Division, basketball.basketball_division.teams, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0k8hkhn
Boston Celtics, award.award_winner.awards_won, m.0_qwmq0
1959 NBA Finals, common.topic.notable_types, Sports League Championship Event
1957 NBA Finals, sports.sports_championship_event.season, 1956–57 NBA season
Boston Celtics, sports.sports_team.roster, m.0wb6zc8
Boston Celtics, sports.sports_team.roster, m.0_6y7kr
Boston Celtics, sports.sports_team.roster, m.0k2_4y3
1965 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
1963 NBA Finals, sports.sports_championship_event.runner_up, Los Angeles Lakers
Boston Celtics, sports.sports_team.championships, 1957 NBA Finals
m.0_qwy6n, award.award_honor.award_winner, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0z5k297
m.051r766, sports.sports_team_roster.team, Boston Celtics
Eastern Conference, basketball.basketball_conference.teams, Boston Celtics
m.0yx5c6w, award.award_nomination.award_nominee, Boston Celtics
1959 NBA Finals, common.topic.notable_for, g.125fgwwq2
Boston Celtics, sports.sports_team.roster, m.0kjrh8t
The NBA Finals, sports.sports_championship.events, 1981 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0k2pdrr
Boston Celtics, sports.sports_team.championships, 1976 NBA Finals
1965–66 NBA season, sports.sports_league_season.championship, 1966 NBA Finals
m.02396wx, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0k8hcr4
Boston Celtics, tv.tv_subject.tv_episodes, 1976 NBA Finals Game 6
Boston Celtics, award.award_winner.awards_won, m.0_qwy8c
1962 NBA Finals, common.topic.notable_for, g.12555pvt7
1969 NBA Finals, sports.sports_championship_event.runner_up, Los Angeles Lakers
1986 NBA Finals, common.topic.notable_for, g.12553j_24
Boston Celtics, award.award_winner.awards_won, m.0_qxtb9
Boston Celtics, tv.tv_subject.tv_episodes, 1976 NBA Finals Game 1
Boston Celtics, sports.sports_team.roster, m.0115xf8p
Boston Celtics, sports.sports_team.roster, m.05ssdk5
m.0ndtw33, sports.sports_team_roster.team, Boston Celtics
1966 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1984 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
m.0_qwykr, award.award_honor.award_winner, Boston Celtics
Boston Celtics, sports.sports_team.championships, 2008 NBA Finals
1973–74 NBA season, sports.sports_league_season.championship, 1974 NBA Finals
Boston Celtics, sports.sports_team.roster, m.011x6hjb
1963–64 NBA season, sports.sports_league_season.championship, 1964 NBA Finals
m.0_qxt_d, award.award_honor.award_winner, Boston Celtics
1967–68 NBA season, sports.sports_league_season.championship, 1968 NBA Finals
1968 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
1957 NBA Finals, sports.sports_championship_event.runner_up, St. Louis Hawks
Boston Celtics, sports.sports_team.roster, m.08tngmb
1969 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1963 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
m.0_qwylx, award.award_honor.award_winner, Boston Celtics
1976 NBA Finals, sports.sports_championship_event.season, 1975–76 NBA season
1962 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
m.07ng6g6, base.ontologies.ontology_instance_mapping.freebase_topic, Boston Celtics
1984 NBA Finals, sports.sports_championship_event.runner_up, Los Angeles Lakers
Boston Celtics, sports.sports_team.roster, m.0sxfyw9
1964 NBA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, sports.sports_team.roster, m.0j2dtls
1976 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
1985–86 NBA season, sports.sports_league_season.championship, 1986 NBA Finals
1968 NBA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, tv.tv_subject.tv_episodes, 1974 NBA Finals Game 2
Boston Celtics, base.ontologies.ontology_instance.equivalent_instances, m.07ng6g6
1966 NBA Finals, common.topic.article, m.0cs24n
2008 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
1960 NBA Finals, sports.sports_championship_event.season, 1959–60 NBA season
1962 NBA Finals, sports.sports_championship_event.season, 1961–62 NBA season
1981 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1969 NBA Finals, common.topic.notable_types, Sports League Championship Event
m.0110pz2r, sports.sports_team_roster.team, Boston Celtics
m.0z5k297, sports.sports_team_roster.team, Boston Celtics
1965 NBA Finals, sports.sports_championship_event.season, 1964–65 NBA season
Boston Celtics, award.award_nominee.award_nominations, m.0z43hm7
Boston Celtics, sports.sports_team.roster, m.02396wx
Boston Celtics, tv.tv_subject.tv_episodes, 1974 NBA Finals Game 3
Boston Celtics, sports.sports_team.roster, m.0k8h69v
Boston Celtics, sports.sports_team.championships, 1984 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0n4hr_g
Boston Celtics, sports.sports_team.championships, 1959 NBA Finals
Boston Celtics, tv.tv_subject.tv_episodes, 1976 NBA Finals Game 2
Boston Celtics, sports.sports_team.roster, m.0n60lgf
Boston Celtics, sports.sports_team.roster, m.0ztz0ph
1960 NBA Finals, common.topic.article, m.0cs2hc
m.0_th72d, sports.sports_team_roster.team, Boston Celtics
1961 NBA Finals, common.topic.article, m.0cs2f_
1963 NBA Finals, common.topic.article, m.0cs29h
1966 NBA Finals, common.topic.notable_for, g.125d40dx6
Boston Celtics, award.award_winner.awards_won, m.0_qwpgd
Boston Celtics, sports.sports_team.roster, m.0_qy714
Boston Celtics, sports.sports_team.roster, m.011w_hdh
m.011y3d1_, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0_qz550
1968 NBA Finals, common.topic.notable_for, g.125fkyjb8
Boston Celtics, sports.sports_team.roster, m.0113ztjw
1974 NBA Finals, common.topic.article, m.0cs1gh
Boston Celtics, sports.sports_team.roster, m.0_qysl7
Boston Celtics, sports.sports_team.roster, m.0ztw1_3
1963 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
m.0j2n1tp, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, tv.tv_subject.tv_episodes, 1976 NBA Finals Game 3
m.03h95d7, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, award.award_winner.awards_won, m.0_qxqdw
Boston Celtics, sports.sports_team.roster, m.0j2dtm2
Boston Celtics, sports.sports_team.roster, m.0k2plv9
Boston Celtics, common.topic.notable_for, g.125dcb2tv
Boston Celtics, sports.sports_team.roster, m.0j2qrz4
Boston Celtics, tv.tv_subject.tv_episodes, 1976 NBA Finals Game 4
1968 NBA Finals, sports.sports_championship_event.season, 1967–68 NBA season
Boston Celtics, award.award_winner.awards_won, m.0_qxt5p
1959 NBA Finals, sports.sports_championship_event.season, 1958–59 NBA season
Boston Celtics, sports.sports_team.roster, m.0ztw1qz
Boston Celtics, sports.sports_team.roster, m.0w7dhrf
Boston Celtics, award.award_winner.awards_won, m.0_qwy6n
Boston Celtics, common.topic.webpage, m.04228m4
1965 NBA Finals, common.topic.notable_types, Sports League Championship Event
1960–61 NBA season, sports.sports_league_season.championship, 1961 NBA Finals
Boston Celtics, tv.tv_subject.tv_episodes, 1974 NBA Finals Game 6
Boston Celtics, sports.sports_team.roster, m.0zv066w
1961–62 NBA season, sports.sports_league_season.championship, 1962 NBA Finals

Answer: 1957 NBA Finals