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 ":".
After
returning
the
car
,
he
went
home
.
After:O
returning:O
the:O
car:O
,:O
he:O
went:O
home:O
.:O