With no explanation, label each line with "location-GPE", "O", "organization-other", "event-sportsevent", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Later
,
the
Thespians
fought
against
the
Persian
army
at
the
Battle
of
Plataea
(
479
BC
)
.
Later:O
,:O
the:O
Thespians:location-GPE
fought:O
against:O
the:O
Persian:organization-other
army:organization-other
at:O
the:O
Battle:event-sportsevent
of:event-sportsevent
Plataea:event-sportsevent
(:O
479:O
BC:O
):O
.:O