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 ":".
Other
sources
of
livelihood
included
farming
and
salt-making
.
Other:O
sources:O
of:O
livelihood:O
included:O
farming:O
and:O
salt-making:O
.:O