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 ":".
There
was
a
single
round
of
throwing
.
There:O
was:O
a:O
single:O
round:O
of:O
throwing:O
.:O