With no explanation, label each line with "O", "person-artist/author", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Late
in
the
century
Anton
Chekhov
emerged
as
a
master
of
the
short
story
as
well
as
a
leading
international
dramatist
.
Late:O
in:O
the:O
century:O
Anton:person-artist/author
Chekhov:person-artist/author
emerged:O
as:O
a:O
master:O
of:O
the:O
short:O
story:O
as:O
well:O
as:O
a:O
leading:O
international:O
dramatist:O
.:O