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 ":".
Matters
came
to
a
head
in
September
2006
as
Aeroflot
's
board
of
directors
convened
to
vote
on
the
Boeing
contract
.
Matters:O
came:O
to:O
a:O
head:O
in:O
September:O
2006:O
as:O
Aeroflot:organization-company
's:O
board:O
of:O
directors:O
convened:O
to:O
vote:O
on:O
the:O
Boeing:organization-company
contract:O
.:O