With no explanation, label each line with "O", "person-politician", "location-GPE", "person-soldier", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other" or "art-painting" preceded by ":".
After
being
badly
defeated
by
Russians
under
Dmitri
Donskoi
first
in
1378
at
the
Battle
of
the
Vozha
River
and
then
at
the
Battle
of
Kulikovo
(
1380
)
,
Mamai
began
to
assemble
a
large
force
to
punish
Dmitri
.
After:O
being:O
badly:O
defeated:O
by:O
Russians:location-GPE
under:O
Dmitri:person-politician
Donskoi:person-politician
first:O
in:O
1378:O
at:O
the:O
Battle:event-attack/battle/war/militaryconflict
of:event-attack/battle/war/militaryconflict
the:event-attack/battle/war/militaryconflict
Vozha:event-attack/battle/war/militaryconflict
River:event-attack/battle/war/militaryconflict
and:O
then:O
at:O
the:O
Battle:event-attack/battle/war/militaryconflict
of:event-attack/battle/war/militaryconflict
Kulikovo:event-attack/battle/war/militaryconflict
(:O
1380:O
):O
,:O
Mamai:person-soldier
began:O
to:O
assemble:O
a:O
large:O
force:O
to:O
punish:O
Dmitri:location-GPE
.:O