With no explanation, label each line with "O", "person-artist/author", "art-other", "art-broadcastprogram", "art-film", "art-music", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
At
the
same
time
Handel
was
preparing
revised
versions
of
his
oratorios
Esther
and
Athalia
.
At:O
the:O
same:O
time:O
Handel:person-artist/author
was:O
preparing:O
revised:O
versions:O
of:O
his:O
oratorios:O
Esther:art-other
and:O
Athalia:art-other
.:O