With no explanation, label each line with "location-GPE", "O", "product-airplane", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
These
changes
left
Mesaba
with
a
fleet
of
49
Saab
340
turboprops
.
These:O
changes:O
left:O
Mesaba:location-GPE
with:O
a:O
fleet:O
of:O
49:O
Saab:product-airplane
340:product-airplane
turboprops:O
.:O