With no explanation, label each line with "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
main
sources
about
him
are
Procopius
,
John
Malalas
and
Theophanes
the
Confessor
.
The:O
main:O
sources:O
about:O
him:O
are:O
Procopius:person-other
,:O
John:person-other
Malalas:person-other
and:O
Theophanes:person-other
the:O
Confessor:O
.:O