With no explanation, label each line with "other-livingthing", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
In
one
attack
,
the
octopus
loses
an
arm
,
and
retreats
to
her
den
to
recover
,
regenerating
the
arm
.
In:O
one:O
attack:O
,:O
the:O
octopus:other-livingthing
loses:O
an:O
arm:O
,:O
and:O
retreats:O
to:O
her:O
den:O
to:O
recover:O
,:O
regenerating:O
the:O
arm:O
.:O