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 ":".
Exchanges
and
trips
are
arranged
between
the
three
.
Exchanges:O
and:O
trips:O
are:O
arranged:O
between:O
the:O
three:O
.:O