With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
He
became
one
of
the
organizers
of
Armenian
self-defense
during
the
Armenian-Tatar
massacres
1905-1907
.
He:O
became:O
one:O
of:O
the:O
organizers:O
of:O
Armenian:location-GPE
self-defense:O
during:O
the:O
Armenian-Tatar:location-GPE
massacres:O
1905-1907:O
.:O