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 ":".
The
syrup
of
four
barrels
of
sugar
usually
gave
a
barrel
of
Rum
.
The:O
syrup:O
of:O
four:O
barrels:O
of:O
sugar:O
usually:O
gave:O
a:O
barrel:O
of:O
Rum:product-food
.:O