With no explanation, label each line with "O", "product-software", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Bitdefender
introduced
Active
Virus
Control
in
August
2009
.
Bitdefender:organization-company
introduced:O
Active:product-software
Virus:product-software
Control:product-software
in:O
August:O
2009:O
.:O