With no explanation, label each line with "O", "organization-sportsleague", "organization-education", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
In
its
second
season
in
the
ECAC
,
Harvard
won
both
the
league
regular
season
championship
and
,
with
a
4–3
overtime
win
over
Boston
University
,
won
the
league
championship
.
In:O
its:O
second:O
season:O
in:O
the:O
ECAC:organization-sportsleague
,:O
Harvard:organization-education
won:O
both:O
the:O
league:O
regular:O
season:O
championship:O
and:O
,:O
with:O
a:O
4–3:O
overtime:O
win:O
over:O
Boston:organization-education
University:organization-education
,:O
won:O
the:O
league:O
championship:O
.:O