With no explanation, label each line with "O", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Several
TDs
led
by
Desmond
O'Malley
challenged
Haughey
for
the
leadership
but
backed
down
on
the
day
of
the
vote
.
Several:O
TDs:O
led:O
by:O
Desmond:person-politician
O'Malley:person-politician
challenged:O
Haughey:person-politician
for:O
the:O
leadership:O
but:O
backed:O
down:O
on:O
the:O
day:O
of:O
the:O
vote:O
.:O