With no explanation, label each line with "O", "event-protest", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
During
the
Revolution
of
1905
he
was
an
active
participant
of
the
strikes
organised
by
his
commilitodes
.
During:O
the:O
Revolution:event-protest
of:event-protest
1905:event-protest
he:O
was:O
an:O
active:O
participant:O
of:O
the:O
strikes:O
organised:O
by:O
his:O
commilitodes:O
.:O