With no explanation, label each line with "other-livingthing", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
virus
infects
chimpanzee
(
``
Pan
troglodytes
``
)
leukocytes
.
The:O
virus:O
infects:O
chimpanzee:other-livingthing
(:O
``:O
Pan:other-livingthing
troglodytes:other-livingthing
``:O
):O
leukocytes:O
.:O