With no explanation, label each line with "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
It
works
as
focus
city
for
Alrosa
Mirny
Air
Enterprise
.
It:O
works:O
as:O
focus:O
city:O
for:O
Alrosa:organization-company
Mirny:organization-company
Air:organization-company
Enterprise:organization-company
.:O