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 ":".
Gen
.
Robert
E.
Rodes
was
forced
to
withdraw
because
of
his
isolated
position
,
despite
the
arrival
of
reinforcements
from
Brig
.
Gen:O
.:O
Robert:person-soldier
E.:person-soldier
Rodes:person-soldier
was:O
forced:O
to:O
withdraw:O
because:O
of:O
his:O
isolated:O
position:O
,:O
despite:O
the:O
arrival:O
of:O
reinforcements:O
from:O
Brig:O
.:O