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 ":".
Due
to
its
prominent
location
,
stark
message
,
and
history
of
repeated
vandalism
,
the
wall
has
become
an
unofficial
landmark
of
mid
Wales
.
Due:O
to:O
its:O
prominent:O
location:O
,:O
stark:O
message:O
,:O
and:O
history:O
of:O
repeated:O
vandalism:O
,:O
the:O
wall:O
has:O
become:O
an:O
unofficial:O
landmark:O
of:O
mid:O
Wales:location-GPE
.:O