With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
First
noticed
in
1991
,
it
is
thought
to
be
a
cannonball
star
,
shot
out
of
a
star
cluster
and
now
moving
rapidly
through
space
directly
away
from
the
galactic
disc
.
First:O
noticed:O
in:O
1991:O
,:O
it:O
is:O
thought:O
to:O
be:O
a:O
cannonball:O
star:O
,:O
shot:O
out:O
of:O
a:O
star:O
cluster:O
and:O
now:O
moving:O
rapidly:O
through:O
space:O
directly:O
away:O
from:O
the:O
galactic:O
disc:O
.:O