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 ":".
Antonov
Airlines
,
a
subsidiary
of
the
Antonov
Aerospace
Design
Bureau
is
the
only
operator
of
the
world
's
largest
fixed
wing
aircraft
,
the
An-225
.
Antonov:organization-company
Airlines:organization-company
,:O
a:O
subsidiary:O
of:O
the:O
Antonov:organization-company
Aerospace:organization-company
Design:organization-company
Bureau:organization-company
is:O
the:O
only:O
operator:O
of:O
the:O
world:O
's:O
largest:O
fixed:O
wing:O
aircraft:O
,:O
the:O
An-225:O
.:O