With no explanation, label each line with "O", "location-road/railway/highway/transit", "organization-politicalparty", "location-GPE", "organization-government/governmentagency", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music" or "art-other" preceded by ":".
Over
the
course
of
the
Laotian
Civil
War
,
the
Central
Intelligence
Agency
directed
a
series
of
offensive
attacks
by
Laotian
irregulars
against
the
Trail
,
which
the
Communists
opposed
.
Over:O
the:O
course:O
of:O
the:O
Laotian:event-attack/battle/war/militaryconflict
Civil:event-attack/battle/war/militaryconflict
War:event-attack/battle/war/militaryconflict
,:O
the:O
Central:organization-government/governmentagency
Intelligence:organization-government/governmentagency
Agency:organization-government/governmentagency
directed:O
a:O
series:O
of:O
offensive:O
attacks:O
by:O
Laotian:location-GPE
irregulars:O
against:O
the:O
Trail:location-road/railway/highway/transit
,:O
which:O
the:O
Communists:organization-politicalparty
opposed:O
.:O