With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
Replacement
parts
had
become
increasingly
difficult
to
obtain
due
to
the
age
of
the
rolling
stock
and
its
conversion
to
push-pull
operation
,
which
had
been
intended
as
a
temporary
measure
until
a
more
permanent
solution
could
be
established
,
had
come
to
the
end
of
its
serviceable
life
.
Replacement:O
parts:O
had:O
become:O
increasingly:O
difficult:O
to:O
obtain:O
due:O
to:O
the:O
age:O
of:O
the:O
rolling:O
stock:O
and:O
its:O
conversion:O
to:O
push-pull:O
operation:O
,:O
which:O
had:O
been:O
intended:O
as:O
a:O
temporary:O
measure:O
until:O
a:O
more:O
permanent:O
solution:O
could:O
be:O
established:O
,:O
had:O
come:O
to:O
the:O
end:O
of:O
its:O
serviceable:O
life:O
.:O