With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
Reports
from
his
superiors
at
the
time
still
criticised
his
lack
of
a
forceful
personality
,
although
they
also
indicated
an
improvement
.
Reports:O
from:O
his:O
superiors:O
at:O
the:O
time:O
still:O
criticised:O
his:O
lack:O
of:O
a:O
forceful:O
personality:O
,:O
although:O
they:O
also:O
indicated:O
an:O
improvement:O
.:O