With no explanation, label each line with "person-soldier", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
General
Erich
Ludendorff
was
reluctant
to
order
the
withdrawal
and
hesitated
until
the
last
moment
.
General:O
Erich:person-soldier
Ludendorff:person-soldier
was:O
reluctant:O
to:O
order:O
the:O
withdrawal:O
and:O
hesitated:O
until:O
the:O
last:O
moment:O
.:O