With no explanation, label each line with "O", "product-ship", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Renamed
``
Cristobal
Colon
``
she
served
as
a
coastal
escort
until
1978
when
she
was
removed
from
the
active
list
.
Renamed:O
``:O
Cristobal:product-ship
Colon:product-ship
``:O
she:O
served:O
as:O
a:O
coastal:O
escort:O
until:O
1978:O
when:O
she:O
was:O
removed:O
from:O
the:O
active:O
list:O
.:O