With no explanation, label each line with "O", "other-biologything", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
In
virology
,
influenza
A
virus
subtype
H1N1
(
A/H1N1
)
is
a
subtype
of
``
Influenza
A
virus
``
.
In:O
virology:O
,:O
influenza:O
A:other-biologything
virus:other-biologything
subtype:other-biologything
H1N1:other-biologything
(:O
A/H1N1:other-biologything
):O
is:O
a:O
subtype:O
of:O
``:O
Influenza:other-biologything
A:other-biologything
virus:other-biologything
``:O
.:O