With no explanation, label each line with "O", "event-disaster", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
It
is
also
called
the
Sanyi
Air
Disaster
.
It:O
is:O
also:O
called:O
the:event-disaster
Sanyi:event-disaster
Air:event-disaster
Disaster:event-disaster
.:O