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 ":".
The
Sierra
de
Gata
is
located
in
the
northwest
of
the
province
of
Cáceres
,
which
is
in
the
autonomous
community
of
Extremadura
.
The:O
Sierra:location-mountain
de:location-mountain
Gata:location-mountain
is:O
located:O
in:O
the:O
northwest:O
of:O
the:O
province:O
of:O
Cáceres:location-GPE
,:O
which:O
is:O
in:O
the:O
autonomous:O
community:O
of:O
Extremadura:location-GPE
.:O