With no explanation, label each line with "O", "other-chemicalthing", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Both
of
these
requirements
can
occur
only
when
urine
is
infected
with
a
urease-producing
organism
such
as
``
Proteus
``
.
Both:O
of:O
these:O
requirements:O
can:O
occur:O
only:O
when:O
urine:O
is:O
infected:O
with:O
a:O
urease-producing:O
organism:O
such:O
as:O
``:O
Proteus:other-chemicalthing
``:O
.:O