With no explanation, label each line with "O", "location-road/railway/highway/transit", "location-mountain", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
Nantlle
Ridge
has
two
Marilyns
and
four
Hewitts
on
the
route
;
the
ridge
is
about
8–9
miles
long
and
the
high
point
is
Craig
Cwm
Silyn
at
2,408
feet
:
The:location-road/railway/highway/transit
Nantlle:location-road/railway/highway/transit
Ridge:location-road/railway/highway/transit
has:O
two:O
Marilyns:location-mountain
and:O
four:O
Hewitts:location-mountain
on:O
the:O
route:O
;:O
the:O
ridge:O
is:O
about:O
8–9:O
miles:O
long:O
and:O
the:O
high:O
point:O
is:O
Craig:location-mountain
Cwm:location-mountain
Silyn:location-mountain
at:O
2,408:O
feet:O
::O