With no explanation, label each line with "other-disease", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
exact
cause
of
desquamative
gingivitis
can
not
be
determined
about
a
third
of
cases
.
The:O
exact:O
cause:O
of:O
desquamative:other-disease
gingivitis:other-disease
can:O
not:O
be:O
determined:O
about:O
a:O
third:O
of:O
cases:O
.:O