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 ":".
The
poster
promoted
a
hair
strengthening
product
.
The:O
poster:O
promoted:O
a:O
hair:O
strengthening:O
product:O
.:O