With no explanation, label each line with "event-attack/battle/war/militaryconflict", "O", "organization-government/governmentagency", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
Sand
Creek
massacre
(
also
known
as
the
Chivington
massacre
,
the
battle
of
Sand
Creek
or
the
massacre
of
Cheyenne
Indians
)
was
a
massacre
of
Cheyenne
and
Arapaho
people
by
the
U.S.
Army
in
the
American
Indian
Wars
that
occurred
on
November
29
,
1864
,
when
a
675-man
force
of
the
Third
Colorado
Cavalry
under
the
command
of
U.S
.
The:O
Sand:O
Creek:O
massacre:O
(:O
also:O
known:O
as:O
the:O
Chivington:O
massacre:O
,:O
the:O
battle:O
of:O
Sand:O
Creek:O
or:O
the:O
massacre:O
of:O
Cheyenne:O
Indians:O
):O
was:O
a:O
massacre:O
of:O
Cheyenne:O
and:O
Arapaho:O
people:O
by:O
the:O
U.S.:organization-government/governmentagency
Army:organization-government/governmentagency
in:O
the:O
American:event-attack/battle/war/militaryconflict
Indian:event-attack/battle/war/militaryconflict
Wars:event-attack/battle/war/militaryconflict
that:O
occurred:O
on:O
November:O
29:O
,:O
1864:O
,:O
when:O
a:O
675-man:O
force:O
of:O
the:O
Third:organization-government/governmentagency
Colorado:organization-government/governmentagency
Cavalry:organization-government/governmentagency
under:O
the:O
command:O
of:O
U.S:O
.:O