With no explanation, label each line with "O", "location-bodiesofwater", "location-other", "location-GPE", "organization-government/governmentagency", "art-broadcastprogram", "art-film", "art-music", "art-other" or "art-painting" preceded by ":".
Antietam
National
Battlefield
is
a
National
Park
Service
-protected
area
along
Antietam
Creek
in
Sharpsburg
,
Washington
County
,
northwestern
Maryland
.
Antietam:location-other
National:location-other
Battlefield:location-other
is:O
a:O
National:organization-government/governmentagency
Park:organization-government/governmentagency
Service:organization-government/governmentagency
-protected:O
area:O
along:O
Antietam:location-bodiesofwater
Creek:location-bodiesofwater
in:O
Sharpsburg:location-GPE
,:O
Washington:location-GPE
County:location-GPE
,:O
northwestern:O
Maryland:location-GPE
.:O