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 ":".
But
he
did
n't
play
in
2012
due
to
injuries
.
But:O
he:O
did:O
n't:O
play:O
in:O
2012:O
due:O
to:O
injuries:O
.:O