With no explanation, label each line with "O", "organization-other", "organization-politicalparty", "event-other", "other-law", "art-broadcastprogram", "art-film", "art-music", "art-other" or "art-painting" preceded by ":".
In
1918
,
after
the
October
Revolution
,
the
Bolsheviks
signed
a
separate
peace
with
the
Central
Powers
in
the
Treaty
of
Brest-Litovsk
.
In:O
1918:O
,:O
after:O
the:O
October:event-other
Revolution:event-other
,:O
the:O
Bolsheviks:organization-politicalparty
signed:O
a:O
separate:O
peace:O
with:O
the:O
Central:organization-other
Powers:organization-other
in:O
the:O
Treaty:other-law
of:other-law
Brest-Litovsk:other-law
.:O