With no explanation, label each line with "O", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
He
demurred
,
concerned
about
the
daunting
geographical
obstacles
and
logistical
challenges
,
preferring
to
wait
for
Rosecrans
to
solve
those
same
problems
and
attack
him
.
He:O
demurred:O
,:O
concerned:O
about:O
the:O
daunting:O
geographical:O
obstacles:O
and:O
logistical:O
challenges:O
,:O
preferring:O
to:O
wait:O
for:O
Rosecrans:person-politician
to:O
solve:O
those:O
same:O
problems:O
and:O
attack:O
him:O
.:O