With no explanation, label each line with "O", "organization-sportsleague", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
They
play
in
the
USAFL
.
They:O
play:O
in:O
the:O
USAFL:organization-sportsleague
.:O