With no explanation, label each line with "O", "other-medical", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
They
recommend
that
it
be
used
only
when
artemisinins
are
not
available
.
They:O
recommend:O
that:O
it:O
be:O
used:O
only:O
when:O
artemisinins:other-medical
are:O
not:O
available:O
.:O