With no explanation, label each line with "location-GPE", "O", "product-food", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Ampelographers
have
long
theorized
that
the
grape
originated
in
northern
Italy
.
Ampelographers:O
have:O
long:O
theorized:O
that:O
the:O
grape:product-food
originated:O
in:O
northern:O
Italy:location-GPE
.:O