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 ":".
The
agreement
broke
in
2000
after
the
failure
of
a
year-long
ETA
truce
(
see
:
Lizarra
Agreement
)
on
which
they
accused
each
other
of
being
responsible
.
The:O
agreement:O
broke:O
in:O
2000:O
after:O
the:O
failure:O
of:O
a:O
year-long:O
ETA:O
truce:O
(:O
see:O
::O
Lizarra:O
Agreement:O
):O
on:O
which:O
they:O
accused:O
each:O
other:O
of:O
being:O
responsible:O
.:O