With no explanation, label each line with "location-GPE", "person-soldier", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
At
the
time
of
the
attack
,
Admiral
Crowe
claimed
that
the
Iranian
plane
did
not
identify
itself
and
sent
no
response
to
warning
signals
he
had
sent
.
At:O
the:O
time:O
of:O
the:O
attack:O
,:O
Admiral:O
Crowe:person-soldier
claimed:O
that:O
the:O
Iranian:location-GPE
plane:O
did:O
not:O
identify:O
itself:O
and:O
sent:O
no:O
response:O
to:O
warning:O
signals:O
he:O
had:O
sent:O
.:O