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 ":".
Hemagglutinin
(
H
)
serves
as
a
cell
attachment
factor
and
membrane
fusion
protein
.
Hemagglutinin:other-biologything
(:other-biologything
H:other-biologything
):other-biologything
serves:O
as:O
a:O
cell:O
attachment:O
factor:O
and:O
membrane:O
fusion:O
protein:O
.:O