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 ":".
Ozawa
's
pilots
boasted
of
their
fiery
determination
,
but
they
had
only
a
fourth
as
much
training
and
experience
as
the
Americans
.
Ozawa:O
's:O
pilots:O
boasted:O
of:O
their:O
fiery:O
determination:O
,:O
but:O
they:O
had:O
only:O
a:O
fourth:O
as:O
much:O
training:O
and:O
experience:O
as:O
the:O
Americans:O
.:O