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 ":".
In
2005
the
discovery
of
a
candidate
planet
orbiting
the
primary
star
of
the
triple
star
system
was
announced
.
In:O
2005:O
the:O
discovery:O
of:O
a:O
candidate:O
planet:O
orbiting:O
the:O
primary:O
star:O
of:O
the:O
triple:O
star:O
system:O
was:O
announced:O
.:O