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 ":".
He
was
mainly
interested
in
issues
related
to
trade
and
shipping
.
He:O
was:O
mainly:O
interested:O
in:O
issues:O
related:O
to:O
trade:O
and:O
shipping:O
.:O