With no explanation, label each line with "O", "event-protest", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Daoud
was
overthrown
in
the
Saur
Revolution
the
following
year
and
no
elections
were
held
under
the
new
constitution
.
Daoud:person-politician
was:O
overthrown:O
in:O
the:O
Saur:event-protest
Revolution:event-protest
the:O
following:O
year:O
and:O
no:O
elections:O
were:O
held:O
under:O
the:O
new:O
constitution:O
.:O