With no explanation, label each line with "O", "other-astronomything", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
In
2002
,
the
discovery
of
the
planet
HD
128311
b
was
announced
by
Paul
Butler
.
In:O
2002:O
,:O
the:O
discovery:O
of:O
the:O
planet:other-astronomything
HD:other-astronomything
128311:other-astronomything
b:other-astronomything
was:O
announced:O
by:O
Paul:person-other
Butler:person-other
.:O