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 ":".
Tomato
sauce
is
used
as
a
base
for
spicy
sauces
and
moles
.
Tomato:product-food
sauce:product-food
is:O
used:O
as:O
a:O
base:O
for:O
spicy:product-food
sauces:product-food
and:O
moles:product-food
.:O