With no explanation, label each line with "O", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
He
was
active
in
the
reign
of
Justinian
I
(
r.
527-565
)
.
He:O
was:O
active:O
in:O
the:O
reign:O
of:O
Justinian:person-politician
I:person-politician
(:O
r.:O
527-565:O
):O
.:O