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 ":".
The
Shuttle
was
not
launched
under
conditions
where
it
could
have
been
struck
by
lightning
.
The:O
Shuttle:O
was:O
not:O
launched:O
under:O
conditions:O
where:O
it:O
could:O
have:O
been:O
struck:O
by:O
lightning:O
.:O