With no explanation, label each line with "location-GPE", "building-other", "O", "product-weapon", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
The
4.7-inch
guns
at
Fort
Delaware
were
sent
to
San
Francisco
for
use
on
Army
troop
transports
;
they
were
returned
to
Fort
Delaware
in
1919
but
were
soon
removed
from
service
and
used
as
war
memorials
.
The:O
4.7-inch:product-weapon
guns:product-weapon
at:O
Fort:building-other
Delaware:building-other
were:O
sent:O
to:O
San:location-GPE
Francisco:location-GPE
for:O
use:O
on:O
Army:O
troop:O
transports:O
;:O
they:O
were:O
returned:O
to:O
Fort:building-other
Delaware:building-other
in:O
1919:O
but:O
were:O
soon:O
removed:O
from:O
service:O
and:O
used:O
as:O
war:O
memorials:O
.:O