With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Later
,
in
the
Roman
Empire
,
the
local
lords
of
the
land
had
to
pay
tithes
to
the
empire
for
``
opus
pontis
''
.
Later:O
,:O
in:O
the:O
Roman:location-GPE
Empire:O
,:O
the:O
local:O
lords:O
of:O
the:O
land:O
had:O
to:O
pay:O
tithes:O
to:O
the:O
empire:O
for:O
``:O
opus:O
pontis:O
'':O
.:O