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 ":".
After
summer
2004
,
vocal
trance
became
less
common
on
European
music
TV
channels
.
After:O
summer:O
2004:O
,:O
vocal:O
trance:O
became:O
less:O
common:O
on:O
European:location-GPE
music:O
TV:O
channels:O
.:O