With no explanation, label each line with "location-GPE", "O", "location-mountain", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
It
continues
by
ascending
over
the
Curlew
Mountains
before
descending
into
Boyle
from
the
west
.
It:O
continues:O
by:O
ascending:O
over:O
the:O
Curlew:location-mountain
Mountains:location-mountain
before:O
descending:O
into:O
Boyle:location-GPE
from:O
the:O
west:O
.:O