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
round-robin
stage
consisted
of
two
groups
of
six
players
,
ten
top
16
players
.
The:O
round-robin:O
stage:O
consisted:O
of:O
two:O
groups:O
of:O
six:O
players:O
,:O
ten:O
top:O
16:O
players:O
.:O