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 ":".
This
was
the
final
communication
with
the
aircraft
prior
to
the
accident
.
This:O
was:O
the:O
final:O
communication:O
with:O
the:O
aircraft:O
prior:O
to:O
the:O
accident:O
.:O