With no explanation, label each line with "location-GPE", "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Back
in
Rome
,
Camillus
celebrated
with
another
Triumph
.
Back:O
in:O
Rome:location-GPE
,:O
Camillus:person-other
celebrated:O
with:O
another:O
Triumph:O
.:O