With no explanation, label each line with "O", "other-medical", "other-biologything", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Flu
drugs
Tamiflu
and
Relenza
work
by
inhibiting
some
strains
of
neuraminidase
.
Flu:O
drugs:O
Tamiflu:other-medical
and:O
Relenza:other-medical
work:O
by:O
inhibiting:O
some:O
strains:O
of:O
neuraminidase:other-biologything
.:O