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 ":".
It
was
named
after
the
Bulgarian
town
of
Kotel
.
It:O
was:O
named:O
after:O
the:O
Bulgarian:location-GPE
town:O
of:O
Kotel:location-GPE
.:O