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 ":".
In
2015
,
boys
'
volleyball
went
undefeated
in
league
play
.
In:O
2015:O
,:O
boys:O
':O
volleyball:O
went:O
undefeated:O
in:O
league:O
play:O
.:O