With no explanation, label each line with "product-other", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
It
was
released
worldwide
for
digital
download
on
Steam
on
September
1
,
2008
.
It:O
was:O
released:O
worldwide:O
for:O
digital:O
download:O
on:O
Steam:product-other
on:O
September:O
1:O
,:O
2008:O
.:O