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
iron-rich
waters
were
prescribed
for
anemia
and
related
complications
.
The:O
iron-rich:O
waters:O
were:O
prescribed:O
for:O
anemia:O
and:O
related:O
complications:O
.:O