With no explanation, label each line with "location-GPE", "O", "person-scholar", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
Byzantine
historian
Procopius
,
who
witnessed
the
plague
,
documented
that
citizens
died
at
a
rate
of
10,000
per
day
in
Constantinople
.
The:O
Byzantine:location-GPE
historian:O
Procopius:person-scholar
,:O
who:O
witnessed:O
the:O
plague:O
,:O
documented:O
that:O
citizens:O
died:O
at:O
a:O
rate:O
of:O
10,000:O
per:O
day:O
in:O
Constantinople:location-GPE
.:O