With no explanation, label each line with "event-attack/battle/war/militaryconflict", "O", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
road
was
also
actively
used
by
both
Union
and
Confederate
forces
during
the
American
Civil
War
,
and
was
the
major
route
of
advance
by
Confederate
forces
leading
to
the
Battle
of
Pea
Ridge
,
whose
battlefield
is
preserved
by
the
park
.
The:O
road:O
was:O
also:O
actively:O
used:O
by:O
both:O
Union:organization-other
and:organization-other
Confederate:organization-other
forces:organization-other
during:O
the:O
American:event-attack/battle/war/militaryconflict
Civil:event-attack/battle/war/militaryconflict
War:event-attack/battle/war/militaryconflict
,:O
and:O
was:O
the:O
major:O
route:O
of:O
advance:O
by:O
Confederate:organization-other
forces:organization-other
leading:O
to:O
the:O
Battle:event-attack/battle/war/militaryconflict
of:event-attack/battle/war/militaryconflict
Pea:event-attack/battle/war/militaryconflict
Ridge:event-attack/battle/war/militaryconflict
,:O
whose:O
battlefield:O
is:O
preserved:O
by:O
the:O
park:O
.:O