With no explanation, label each line with "location-GPE", "O", "location-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Salt
Sulphur
Springs
Historic
District
is
a
national
historic
district
located
at
Salt
Sulphur
Springs
,
near
Union
,
West
Virginia
,
Monroe
County
,
West
Virginia
.
Salt:location-other
Sulphur:location-other
Springs:location-other
Historic:location-other
District:location-other
is:O
a:O
national:O
historic:O
district:O
located:O
at:O
Salt:location-GPE
Sulphur:location-GPE
Springs:location-GPE
,:O
near:O
Union:location-GPE
,:O
West:location-GPE
Virginia:location-GPE
,:O
Monroe:location-GPE
County:location-GPE
,:O
West:location-GPE
Virginia:location-GPE
.:O