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 ":".
Around
this
time
they
constructed
a
new
fortress
at
York
(
Eboracum
)
,
as
shown
by
finds
of
tile-stamps
from
the
site
.
Around:O
this:O
time:O
they:O
constructed:O
a:O
new:O
fortress:O
at:O
York:location-GPE
(:O
Eboracum:location-GPE
):O
,:O
as:O
shown:O
by:O
finds:O
of:O
tile-stamps:O
from:O
the:O
site:O
.:O