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 ":".
He
told
me
what
had
happened
.
He:O
told:O
me:O
what:O
had:O
happened:O
.:O