With no explanation, label each line with "O", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
It
was
one
of
the
significant
groups
in
the
formation
of
Armed
Forces
Movement
and
the
Carnation
Revolution
in
1974
.
It:O
was:O
one:O
of:O
the:O
significant:O
groups:O
in:O
the:O
formation:O
of:O
Armed:event-attack/battle/war/militaryconflict
Forces:event-attack/battle/war/militaryconflict
Movement:event-attack/battle/war/militaryconflict
and:O
the:O
Carnation:event-attack/battle/war/militaryconflict
Revolution:event-attack/battle/war/militaryconflict
in:O
1974:O
.:O