With no explanation, label each line with "person-politician", "O", "organization-other", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
The
unofficial
leader
of
the
AKM
is
Sergei
Udaltsov
(
Сергей
Удальцов
)
,
who
has
been
arrested
several
times
for
protesting
against
Vladimir
Putin
's
regime
.
The:O
unofficial:O
leader:O
of:O
the:O
AKM:organization-other
is:O
Sergei:person-other
Udaltsov:person-other
(:O
Сергей:person-other
Удальцов:person-other
):O
,:O
who:O
has:O
been:O
arrested:O
several:O
times:O
for:O
protesting:O
against:O
Vladimir:person-politician
Putin:person-politician
's:O
regime:O
.:O