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 ":".
While
unsuccessful
as
a
fighter
,
it
was
used
as
an
advanced
trainer
aircraft
between
1924
and
1933
.
While:O
unsuccessful:O
as:O
a:O
fighter:O
,:O
it:O
was:O
used:O
as:O
an:O
advanced:O
trainer:O
aircraft:O
between:O
1924:O
and:O
1933:O
.:O