With no explanation, label each line with "location-GPE", "O", "event-disaster", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Before
the
Byzantine–Sassanid
War
of
602–628
,
the
Plague
of
Justinian
had
erupted
(
541-542
)
,
spreading
through
Persia
and
into
Byzantine
territory
.
Before:O
the:O
Byzantine–Sassanid:event-attack/battle/war/militaryconflict
War:event-attack/battle/war/militaryconflict
of:O
602–628:O
,:O
the:O
Plague:event-disaster
of:event-disaster
Justinian:event-disaster
had:O
erupted:O
(:O
541-542:O
):O
,:O
spreading:O
through:O
Persia:location-GPE
and:O
into:O
Byzantine:location-GPE
territory:O
.:O