With no explanation, label each line with "O", "other-astronomything", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
At
the
time
it
was
referred
to
as
Ara
A
,
with
another
strong
radio
source
in
the
cluster
called
Ara
C
.
Its
brightness
in
the
radio
spectrum
makes
it
one
of
the
rare
``
radio
stars
''
.
At:O
the:O
time:O
it:O
was:O
referred:O
to:O
as:O
Ara:other-astronomything
A:other-astronomything
,:O
with:O
another:O
strong:O
radio:O
source:O
in:O
the:O
cluster:O
called:O
Ara:other-astronomything
C:other-astronomything
.:O
Its:O
brightness:O
in:O
the:O
radio:O
spectrum:O
makes:O
it:O
one:O
of:O
the:O
rare:O
``:O
radio:O
stars:O
'':O
.:O