With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
Landing
craft
were
generally
only
identified
by
number
(
for
example
``
LST
3512
''
)
.
Landing:O
craft:O
were:O
generally:O
only:O
identified:O
by:O
number:O
(:O
for:O
example:O
``:O
LST:O
3512:O
'':O
):O
.:O