With no explanation, label each line with "O", "product-ship", "product-weapon", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
A
tactical
atomic
bomb
on
a
rocket
obliterates
half
of
the
Plutonian
ship
,
which
flees
.
A:O
tactical:product-weapon
atomic:product-weapon
bomb:product-weapon
on:O
a:O
rocket:O
obliterates:O
half:O
of:O
the:O
Plutonian:product-ship
ship:product-ship
,:O
which:O
flees:O
.:O