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 ":".
Its
drainage
basin
was
once
the
site
of
extensive
cotton
plantings
,
which
have
been
greatly
diminished
in
recent
decades
by
extensive
urbanization
of
the
area
.
Its:O
drainage:O
basin:O
was:O
once:O
the:O
site:O
of:O
extensive:O
cotton:O
plantings:O
,:O
which:O
have:O
been:O
greatly:O
diminished:O
in:O
recent:O
decades:O
by:O
extensive:O
urbanization:O
of:O
the:O
area:O
.:O