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 ":".
On
the
night
of
15
May
–
16
May
,
she
picked
up
the
10
crewmen
of
a
PBM
Mariner
patrol
bomber
which
was
foundering
in
heavy
seas
.
On:O
the:O
night:O
of:O
15:O
May:O
–:O
16:O
May:O
,:O
she:O
picked:O
up:O
the:O
10:O
crewmen:O
of:O
a:O
PBM:product-ship
Mariner:product-ship
patrol:O
bomber:O
which:O
was:O
foundering:O
in:O
heavy:O
seas:O
.:O