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 ":".
Each
kilogram
of
finished
cheese
requires
about
of
milk
to
produce
.
Each:O
kilogram:O
of:O
finished:O
cheese:product-food
requires:O
about:O
of:O
milk:product-food
to:O
produce:O
.:O