With no explanation, label each line with "O", "product-food", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
It
is
drunk
before
dinner
with
appetizers
at
happy
hour
.
It:O
is:O
drunk:O
before:O
dinner:O
with:O
appetizers:product-food
at:O
happy:O
hour:O
.:O