With no explanation, label each line with "product-other", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
From
1973
the
South
African
Class
91-000
General
Electric
diesels
were
introduced
,
the
most
powerful
2
foot
gauge
diesel
in
the
world
.
From:O
1973:O
the:O
South:product-other
African:product-other
Class:product-other
91-000:product-other
General:product-other
Electric:product-other
diesels:product-other
were:O
introduced:O
,:O
the:O
most:O
powerful:O
2:O
foot:O
gauge:O
diesel:O
in:O
the:O
world:O
.:O