With no explanation, label each line with "person-politician", "O", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
On
the
outbreak
World
War
I
,
Swanwick
began
campaigning
for
a
negotiated
peace
.
On:O
the:O
outbreak:O
World:event-attack/battle/war/militaryconflict
War:event-attack/battle/war/militaryconflict
I:event-attack/battle/war/militaryconflict
,:O
Swanwick:person-politician
began:O
campaigning:O
for:O
a:O
negotiated:O
peace:O
.:O