With no explanation, label each line with "O", "other-chemicalthing", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Existing
nuclear
reactors
must
be
re-licensed
before
MOX
fuel
can
be
introduced
because
using
it
changes
the
operating
characteristics
of
a
reactor
,
and
the
plant
must
be
designed
or
adapted
slightly
to
take
it
;
for
example
,
more
control
rods
are
needed
.
Existing:O
nuclear:O
reactors:O
must:O
be:O
re-licensed:O
before:O
MOX:other-chemicalthing
fuel:other-chemicalthing
can:O
be:O
introduced:O
because:O
using:O
it:O
changes:O
the:O
operating:O
characteristics:O
of:O
a:O
reactor:O
,:O
and:O
the:O
plant:O
must:O
be:O
designed:O
or:O
adapted:O
slightly:O
to:O
take:O
it:O
;:O
for:O
example:O
,:O
more:O
control:O
rods:O
are:O
needed:O
.:O