With no explanation, label each line with "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
This
dissatisfaction
was
a
central
obstacle
to
Kicking
Bird
's
peace
efforts
.
This:O
dissatisfaction:O
was:O
a:O
central:O
obstacle:O
to:O
Kicking:person-other
Bird:person-other
's:O
peace:O
efforts:O
.:O