With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
The
city
generates
about
a
day
,
but
only
a
small
percentage
is
dumped
into
the
river
.
The:O
city:O
generates:O
about:O
a:O
day:O
,:O
but:O
only:O
a:O
small:O
percentage:O
is:O
dumped:O
into:O
the:O
river:O
.:O