With no explanation, label each line with "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
confrontation
ends
in
a
stalemate
,
for
Ivan
had
gone
mad
with
guilt
and
nobody
was
sure
what
to
do
.
The:O
confrontation:O
ends:O
in:O
a:O
stalemate:O
,:O
for:O
Ivan:person-other
had:O
gone:O
mad:O
with:O
guilt:O
and:O
nobody:O
was:O
sure:O
what:O
to:O
do:O
.:O