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 ":".
Petrushka
is
a
roguish
character
who
is
often
used
to
comment
on
contemporary
society
's
social
vices
.
Petrushka:person-other
is:O
a:O
roguish:O
character:O
who:O
is:O
often:O
used:O
to:O
comment:O
on:O
contemporary:O
society:O
's:O
social:O
vices:O
.:O