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 ":".
Its
use
in
the
Douro
region
has
been
increasing
in
recent
years
.
Its:O
use:O
in:O
the:O
Douro:location-GPE
region:O
has:O
been:O
increasing:O
in:O
recent:O
years:O
.:O