With no explanation, label each line with "O", "location-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Designed
to
allow
cannons
to
hit
enemy
ships
at
water
level
,
Fort
Point
is
the
only
one
of
its
kind
in
the
west
.
Designed:O
to:O
allow:O
cannons:O
to:O
hit:O
enemy:O
ships:O
at:O
water:O
level:O
,:O
Fort:location-other
Point:location-other
is:O
the:O
only:O
one:O
of:O
its:O
kind:O
in:O
the:O
west:O
.:O