With no explanation, label each line with "O", "product-ship", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Ensign
Rowan
sustained
injuries
and
was
in
the
water
for
two
hours
until
rescued
by
a
Landing
craft
tank
which
the
ship
had
been
escorting
.
Ensign:O
Rowan:person-other
sustained:O
injuries:O
and:O
was:O
in:O
the:O
water:O
for:O
two:O
hours:O
until:O
rescued:O
by:O
a:O
Landing:product-ship
craft:product-ship
tank:product-ship
which:O
the:O
ship:O
had:O
been:O
escorting:O
.:O