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 that won the 1974 NBA Finals championship win their first championship? 
Knowledge Triplets: m.0w310mt, sports.sports_team_roster.team, Boston Celtics
2013 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
2001 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
Boston Celtics, sports.sports_team.roster, m.0k8hcr4
2008 NBA Finals, common.topic.notable_types, Sports League Championship Event
1974 NBA Finals, sports.sports_championship_event.runner_up, Milwaukee Bucks
The NBA Finals, common.topic.article, m.03m5xb
1965 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
The NBA Finals, sports.sports_championship.events, 2005 NBA Finals
1986 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
2010 NBA Finals, sports.sports_championship_event.runner_up, Boston Celtics
1956 NBA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, sports.sports_team.colors, Gold
Boston Celtics, sports.sports_team.championships, 1963 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0j2dtm7
2008 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
The NBA Finals, sports.sports_championship.events, 1955 NBA Finals
The NBA Finals, sports.sports_championship.events, 1960 NBA Finals
The NBA Finals, sports.sports_championship.events, 1961 NBA Finals
m.09wdcm7, common.webpage.topic, The NBA Finals
The NBA Finals, sports.sports_championship.events, 2000 NBA Finals
2002 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
The NBA Finals, sports.sports_championship.events, 1976 NBA Finals
1977 NBA Finals, common.topic.notable_types, Sports League Championship Event
m.051r766, sports.sports_team_roster.team, Boston Celtics
m.02kbc6p, sports.sports_award.team, Boston Celtics
Sports League Championship Event, common.topic.notable_types, 1957 NBA Finals
2005 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
Boston Celtics, sports.sports_team.championships, 1986 NBA Finals
2004 NBA Finals, common.topic.notable_types, Sports League Championship Event
The NBA Finals, sports.sports_championship.events, 1970 NBA Finals
The NBA Finals, sports.sports_championship.events, 1951 NBA Finals
1947 BAA Finals, sports.sports_championship_event.championship, The NBA Finals
Boston Celtics, tv.tv_subject.tv_episodes, 1976 NBA Finals Game 4
2006 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1994 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1960 NBA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, sports.sports_team.roster, m.0z4403l
1987 NBA Finals, common.topic.notable_types, Sports League Championship Event
2014 NBA Finals, freebase.valuenotation.is_reviewed, Champion
The NBA Finals, base.popstra.business_location.customer, m.064wg_z
Boston Celtics, sports.sports_team.roster, m.03h95d7
Boston Celtics, sports.sports_team.roster, m.02396wx
1973–74 NBA season, sports.sports_league_season.awards, m.02kbcky
1996 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
Boston Celtics, sports.sports_team.roster, m.011y25qz
The NBA Finals, common.topic.webpage, m.09w74wk
Boston Celtics, sports.sports_team.roster, m.0sxfyw9
1991 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
The NBA Finals, sports.sports_championship.events, 1956 NBA Finals
The NBA Finals, sports.sports_championship.events, 1957 NBA Finals
1963 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
m.09wzs_4, common.webpage.topic, The NBA Finals
The NBA Finals, sports.sports_championship.events, 1966 NBA Finals
1967 NBA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, tv.tv_subject.tv_episodes, 1974 NBA Finals Game 6
1976 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1969 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0ztz0ph
The NBA Finals, sports.sports_championship.events, 1979 NBA Finals
Boston Celtics, sports.sports_team.championships, 1968 NBA Finals
1983 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
m.09wytr4, common.webpage.topic, The NBA Finals
Boston Celtics, sports.sports_team.roster, m.0w310mt
The NBA Finals, sports.sports_championship.events, 1971 NBA Finals
The NBA Finals, time.recurring_event.instances, 2011 NBA Finals
1962 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
Basketball, sports.sport.team_coaches, Brad Stevens
2012 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1971 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
National Basketball Association, sports.sports_league.championship, The NBA Finals
Boston Celtics, sports.sports_team.coaches, m.0w1g5hx
1994 NBA Finals, common.topic.notable_types, Sports League Championship Event
The NBA Finals, sports.sports_championship.events, 2010 NBA Finals
Boston Celtics, sports.sports_team.championships, 1960 NBA Finals
The NBA Finals, sports.sports_championship.league, National Basketball Association
The NBA Finals, sports.sports_championship.events, 1982 NBA Finals
m.064wg_z, base.popstra.hangout.business_location, The NBA Finals
m.0ndtw33, sports.sports_team_roster.team, Boston Celtics
1974 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
Boston Celtics, sports.sports_team.colors, White
2014 NBA Finals, common.topic.notable_types, Sports League Championship Event
m.0z4tlyt, sports.sports_team_roster.team, Boston Celtics
1971 NBA Finals, sports.sports_championship_event.champion, Milwaukee Bucks
Boston Celtics, sports.sports_team.roster, m.051r766
Boston Celtics, tv.tv_subject.tv_episodes, 1974 NBA Finals Game 7
m.05hy04s, sports.sports_team_roster.team, Boston Celtics
1973–74 NBA season, common.topic.notable_types, Sports League Season
1984 NBA Finals, common.topic.notable_types, Sports League Championship Event
1974 NBA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, sports.sports_team.roster, m.01148mlh
The NBA Finals, sports.sports_championship.events, 1986 NBA Finals
1981 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
The NBA Finals, common.topic.webpage, m.09wdcm7
1972 NBA Finals, common.topic.notable_types, Sports League Championship Event
The NBA Finals, sports.sports_championship.events, 1990 NBA Finals
Boston Celtics, tv.tv_subject.tv_episodes, 1974 NBA Finals Game 2
Boston Celtics, tv.tv_subject.tv_episodes, 1976 NBA Finals Game 6
Boston Celtics, sports.sports_team.roster, m.0wp8ltr
Boston Celtics, tv.tv_subject.tv_episodes, 1976 NBA Finals Game 5
The NBA Finals, sports.sports_championship.events, 1994 NBA Finals
NBA Finals, tv.tv_program.subjects, Boston Celtics
1966 NBA Finals, common.topic.notable_types, Sports League Championship Event
2014 NBA Finals, time.event.instance_of_recurring_event, The NBA Finals
Boston Celtics, sports.sports_team.league, m.0crt3m_
Boston Celtics, sports.sports_team.colors, Black
The NBA Finals, freebase.valuenotation.is_reviewed, Current frequency
The NBA Finals, sports.sports_championship.events, 1996 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0ztygd7
The NBA Finals, sports.sports_championship.events, 2012 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0_qy714
Boston Celtics, sports.sports_team.roster, m.0ztw1_3
m.01148mlh, sports.sports_team_roster.team, Boston Celtics
2002 NBA Finals, common.topic.notable_types, Sports League Championship Event
2000 NBA Finals, common.topic.notable_types, Sports League Championship Event
1959 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
1954 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1951 NBA Finals, common.topic.notable_types, Sports League Championship Event
1999 NBA Finals, common.topic.notable_types, Sports League Championship Event
The NBA Finals, time.recurring_event.instances, 2014 NBA Finals
The NBA Finals, sports.sports_championship.events, 1983 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0z45_rs
The NBA Finals, sports.sports_championship.events, 1959 NBA Finals
Boston Celtics, sports.sports_team.championships, 1962 NBA Finals
1954 NBA Finals, common.topic.notable_types, Sports League Championship Event
m.0k8hh28, sports.sports_team_roster.team, Boston Celtics
1956 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1957 NBA Finals, common.topic.notable_types, Sports League Championship Event
The NBA Finals, common.topic.webpage, m.09wddf9
m.04zm0d3, sports.sports_award.season, 1973–74 NBA season
m.0qzlbgy, sports.sports_team_roster.team, Boston Celtics
1997 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1980 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1965 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1980 NBA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, sports.sports_team.championships, 1984 NBA Finals
1962 NBA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, sports.sports_team.roster, m.011x6hjb
1976 NBA Finals, common.topic.notable_types, Sports League Championship Event
1973–74 NBA season, common.topic.article, m.09drlz
Boston Celtics, sports.sports_team.roster, m.011y3d1_
1978 NBA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, sports.sports_team.roster, m.0z4tlyt
1988 NBA Finals, common.topic.notable_types, Sports League Championship Event
1966 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
The NBA Finals, sports.sports_championship.events, 1999 NBA Finals
1949 BAA Finals, sports.sports_championship_event.championship, The NBA Finals
Boston Celtics, tv.tv_subject.tv_episodes, 1976 NBA Finals Game 1
1960 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
2012 NBA Finals, common.topic.notable_types, Sports League Championship Event
1989 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1972 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1998 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
The NBA Finals, sports.sports_championship.events, 2006 NBA Finals
1958 NBA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, tv.tv_subject.tv_programs, NBA Finals
The NBA Finals, sports.sports_championship.events, 1949 BAA Finals
The NBA Finals, sports.sports_championship.events, 2008 NBA Finals
2013 NBA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, sports.sports_team.roster, m.0115xf8p
The NBA Finals, time.recurring_event.instances, 2012 NBA Finals
2014 NBA Finals, freebase.valuenotation.is_reviewed, Championship
The NBA Finals, sports.sports_championship.events, 1977 NBA Finals
1973 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
Boston Celtics, sports.sports_team.roster, m.0wb745r
1961 NBA Finals, common.topic.notable_types, Sports League Championship Event
1968 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
The NBA Finals, sports.sports_championship.events, 2003 NBA Finals
The NBA Finals, common.topic.webpage, m.0b4992q
1973–74 NBA season, common.topic.notable_for, g.1254zp26x
2010 NBA Finals, common.topic.notable_types, Sports League Championship Event
1955 NBA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, sports.sports_team.championships, 1969 NBA Finals
m.02kbc6p, sports.sports_award.season, 1973–74 NBA season
1979 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1986 NBA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, sports.sports_team.colors, Green
The NBA Finals, sports.sports_championship.events, 1998 NBA Finals
1985 NBA Finals, common.topic.notable_types, Sports League Championship Event
The NBA Finals, sports.sports_championship.events, 1991 NBA Finals
The NBA Finals, sports.sports_championship.events, 2007 NBA Finals
The NBA Finals, sports.sports_championship.events, 1972 NBA Finals
The NBA Finals, sports.sports_championship.events, 2014 NBA Finals
Boston Celtics, sports.sports_team.roster, m.02397wj
Boston Celtics, sports.sports_team.roster, m.0ndtw33
m.04ynxv1, sports.sports_award.season, 1973–74 NBA season
1948 BAA Finals, common.topic.notable_types, Sports League Championship Event
2003 NBA Finals, common.topic.notable_types, Sports League Championship Event
The NBA Finals, sports.sports_championship.events, 1975 NBA Finals
1947 BAA Finals, common.topic.notable_types, Sports League Championship Event
1973–74 NBA season, sports.sports_league_season.league, National Basketball Association
2014 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
National Basketball Association, sports.sports_league.sport, Basketball
1987 NBA Finals, sports.sports_championship_event.runner_up, Boston Celtics
1951 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
m.09wddf9, common.webpage.topic, The NBA Finals
The NBA Finals, sports.sports_championship.events, 1988 NBA Finals
2006 NBA Finals, common.topic.notable_types, Sports League Championship Event
1949 BAA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, sports.sports_team.roster, m.0ztw1qz
1973–74 NBA season, sports.sports_league_season.awards, m.02kbc8y
Boston Celtics, tv.tv_subject.tv_episodes, 1974 NBA Finals Game 5
1952 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1988 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1990 NBA Finals, common.topic.notable_types, Sports League Championship Event
The NBA Finals, sports.sports_championship_event.championship, 1957 NBA Finals
1967 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
The NBA Finals, sports.sports_championship.events, 1973 NBA Finals
2005 NBA Finals, common.topic.notable_types, Sports League Championship Event
1981 NBA Finals, common.topic.notable_types, Sports League Championship Event
1983 NBA Finals, common.topic.notable_types, Sports League Championship Event
The NBA Finals, time.recurring_event.instances, 2013 NBA Finals
1959 NBA Finals, common.topic.notable_types, Sports League Championship Event
The NBA Finals, freebase.valuenotation.has_no_value, Date of final occurrence
m.0b4992q, common.webpage.topic, The NBA Finals
1976 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
2012 NBA Finals, time.event.instance_of_recurring_event, The NBA Finals
The NBA Finals, sports.sports_championship.events, 1948 BAA Finals
Boston Celtics, sports.sports_team.championships, 1959 NBA Finals
The NBA Finals, common.topic.webpage, m.09wytr4
2011 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1990 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
Boston Celtics, sports.sports_team.championships, 1964 NBA Finals
2008 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
1973–74 NBA season, sports.sports_league_season.awards, m.02kbc6p
The NBA Finals, sports.sports_championship.events, 1964 NBA Finals
2009 NBA Finals, common.topic.notable_types, Sports League Championship Event
1979 NBA Finals, common.topic.notable_types, Sports League Championship Event
1981 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
1992 NBA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, sports.sports_championship_event.champion, 1957 NBA Finals
1973 NBA Finals, common.topic.notable_types, Sports League Championship Event
1999 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
The NBA Finals, sports.sports_championship.events, 1963 NBA Finals
The NBA Finals, sports.sports_championship.events, 1954 NBA Finals
1995 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1997 NBA Finals, common.topic.notable_types, Sports League Championship Event
1971 NBA Finals, common.topic.notable_types, Sports League Championship Event
1963 NBA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, sports.sports_team.championships, 1957 NBA Finals
m.0ztz0ph, sports.sports_team_roster.team, Boston Celtics
1985 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
Boston Celtics, sports.sports_team.championships, 2008 NBA Finals
2003 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1982 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
2004 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1993 NBA Finals, common.topic.notable_types, Sports League Championship Event
The NBA Finals, sports.sports_championship.events, 1962 NBA Finals
2007 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1986 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
Boston Celtics, sports.sports_team.roster, m.0w7q4pg
1968 NBA Finals, common.topic.notable_types, Sports League Championship Event
m.02kbc8y, sports.sports_award.season, 1973–74 NBA season
Boston Celtics, sports.sports_team.colors, Buff
2014 NBA Finals, freebase.valuenotation.is_reviewed, Result
1950 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
The NBA Finals, sports.sports_championship.events, 2002 NBA Finals
1975 NBA Finals, common.topic.notable_types, Sports League Championship Event
1989 NBA Finals, common.topic.notable_types, Sports League Championship Event
1964 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
1970 NBA Finals, common.topic.notable_types, Sports League Championship Event
1963 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
2013 NBA Finals, time.event.instance_of_recurring_event, The NBA Finals
The NBA Finals, sports.sports_championship.events, 1992 NBA Finals
1974 NBA Finals, sports.sports_championship.events, The NBA Finals
1959 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1960 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
The NBA Finals, sports.sports_championship.events, 1978 NBA Finals
Boston Celtics, sports.sports_team.coaches, m.0w3_qv3
1998 NBA Finals, common.topic.notable_types, Sports League Championship Event
m.0crt3nt, sports.sports_league_participation.league, National Basketball Association
Boston Celtics, sports.sports_team.championships, 1974 NBA Finals
1975 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
National Basketball Association, sports.sports_league.seasons, 1973–74 NBA season
1974 NBA Finals, common.topic.notable_for, g.1254xjkz8
m.09wdc12, common.webpage.topic, The NBA Finals
The NBA Finals, sports.sports_championship.events, 1968 NBA Finals
The NBA Finals, sports.sports_championship.events, 2004 NBA Finals
2014 NBA Finals, freebase.valuenotation.is_reviewed, Runner-up
Basketball, sports.sport.team_coaches, Jason Kidd
1973–74 NBA season, sports.sports_league_season.awards, m.04ynxv1
1974 NBA Finals, common.topic.article, m.0cs1gh
2010 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
2009 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
National Basketball Association, sports.sports_league.teams, m.0crt3nt
Boston Celtics, sports.sports_team.championships, 1961 NBA Finals
Boston Celtics, tv.tv_subject.tv_episodes, 1976 NBA Finals Game 3
2000 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
Boston Celtics, sports.sports_team.championships, 1965 NBA Finals
The NBA Finals, sports.sports_championship.events, 1947 BAA Finals
Boston Celtics, sports.sports_team.roster, m.0zv066w
m.02kbcky, sports.sports_award.season, 1973–74 NBA season
1970 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1964 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1969 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
Boston Celtics, tv.tv_subject.tv_episodes, 1976 NBA Finals Game 2
1961 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
The NBA Finals, sports.sports_championship.events, 2009 NBA Finals
1982 NBA Finals, common.topic.notable_types, Sports League Championship Event
The NBA Finals, common.topic.notable_types, Sports League Championship
The NBA Finals, sports.sports_championship.events, 1995 NBA Finals
1991 NBA Finals, common.topic.notable_types, Sports League Championship Event
m.02396wx, sports.sports_team_roster.team, Boston Celtics
Boston Celtics, sports.sports_team.roster, m.0113ztjw
1974 NBA Finals, common.topic.notable_types, Sports League Championship Event
Milwaukee Bucks, sports.sports_team.championships, 1971 NBA Finals
1962 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
2007 NBA Finals, common.topic.notable_types, Sports League Championship Event
The NBA Finals, sports.sports_championship.events, 1993 NBA Finals
1969 NBA Finals, common.topic.notable_types, Sports League Championship Event
The NBA Finals, time.recurring_event.current_frequency, Yearly
The NBA Finals, sports.sports_championship.events, 1974 NBA Finals
1984 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
1977 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
The NBA Finals, sports.sports_championship.events, 1985 NBA Finals
The NBA Finals, sports.sports_championship.events, 1997 NBA Finals
m.02397wj, sports.sports_team_roster.team, Boston Celtics
1953 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
The NBA Finals, sports.sports_championship.events, 1969 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0113ywh7
The NBA Finals, common.topic.webpage, m.09wzs_4
1957 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
1985 NBA Finals, sports.sports_championship_event.runner_up, Boston Celtics
The NBA Finals, sports.sports_championship.events, 1958 NBA Finals
1974 NBA Finals, sports.sports_championship_event.season, 1973–74 NBA season
The NBA Finals, common.topic.webpage, m.09wdc12
The NBA Finals, sports.sports_championship.events, 1987 NBA Finals
Boston Celtics, sports.sports_team.roster, m.011w_f9t
The NBA Finals, sports.sports_championship.events, 1981 NBA Finals
The NBA Finals, freebase.valuenotation.is_reviewed, Date of first occurrence
1957 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
m.0w7dhrf, sports.sports_team_roster.team, Boston Celtics
The NBA Finals, sports.sports_championship.events, 1967 NBA Finals
1958 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1968 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
The NBA Finals, sports.sports_championship.events, 1965 NBA Finals
The NBA Finals, sports.sports_championship.events, 1952 NBA Finals
2001 NBA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, sports.sports_team.roster, m.0r91kbr
1948 BAA Finals, sports.sports_championship_event.championship, The NBA Finals
Boston Celtics, sports.sports_team.roster, m.0110pz2r
The NBA Finals, common.topic.notable_for, g.1254y3jh4
1987 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
Boston Celtics, sports.sports_team.roster, m.0w7dhrf
Boston Celtics, sports.sports_team.championships, 1981 NBA Finals
1958 NBA Finals, sports.sports_championship_event.runner_up, Boston Celtics
Boston Celtics, sports.sports_team.championships, 1966 NBA Finals
Boston Celtics, sports.sports_team.league, m.0crtdcs
Boston Celtics, sports.sports_team.roster, m.0j2dtf_
Boston Celtics, sports.sports_team.roster, m.0k8hh28
Boston Celtics, sports.sports_team.roster, m.0z3ztq1
1974 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
2011 NBA Finals, time.event.instance_of_recurring_event, The NBA Finals
m.09w74wk, common.webpage.topic, The NBA Finals
Boston Celtics, sports.sports_team.championships, 1976 NBA Finals
1993 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
Milwaukee Bucks, sports.sports_team.sport, Basketball
2014 NBA Finals, freebase.valuenotation.is_reviewed, Season
The NBA Finals, sports.sports_championship.events, 2013 NBA Finals
1950 NBA Finals, common.topic.notable_types, Sports League Championship Event
The NBA Finals, sports.sports_championship.events, 1980 NBA Finals
Boston Celtics, tv.tv_subject.tv_episodes, 1974 NBA Finals Game 3
Boston Celtics, sports.sports_team.roster, m.0w7psvt
National Basketball Association, sports.sports_league.teams, m.0crt3m_
1966 NBA Finals, sports.sports_championship_event.champion, Boston Celtics
1984 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
The NBA Finals, sports.sports_championship.events, 1953 NBA Finals
1955 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1964 NBA Finals, common.topic.notable_types, Sports League Championship Event
1953 NBA Finals, common.topic.notable_types, Sports League Championship Event
1973–74 NBA season, sports.sports_league_season.championship, 1974 NBA Finals
The NBA Finals, sports.sports_championship.events, 2001 NBA Finals
1996 NBA Finals, common.topic.notable_types, Sports League Championship Event
Boston Celtics, sports.sports_team.sport, Basketball
1995 NBA Finals, common.topic.notable_types, Sports League Championship Event
1952 NBA Finals, common.topic.notable_types, Sports League Championship Event
1974 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
The NBA Finals, sports.sports_championship.events, 1950 NBA Finals
1978 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
1973–74 NBA season, sports.sports_league_season.awards, m.04zm0d3
1992 NBA Finals, sports.sports_championship_event.championship, The NBA Finals
The NBA Finals, sports.sports_championship.events, 2011 NBA Finals
Boston Celtics, sports.sports_team.roster, m.05yr4cz
The NBA Finals, sports.sports_championship.events, 1989 NBA Finals
Boston Celtics, sports.sports_team.roster, m.0w7qk0x
The NBA Finals, sports.sports_championship.events, 1984 NBA Finals
m.02kbcky, sports.sports_award.team, Milwaukee Bucks
1965 NBA Finals, common.topic.notable_types, Sports League Championship Event
2011 NBA Finals, common.topic.notable_types, Sports League Championship Event
m.011y25qz, sports.sports_team_roster.team, Boston Celtics
1961 NBA Finals, sports.sports_championship_event.championship, The NBA Finals

Answer: 1957 NBA Finals