With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Inside
Nigeria
,
union
membership
increased
sixfold
during
the
war
to
30,000
.
Inside:O
Nigeria:location-GPE
,:O
union:O
membership:O
increased:O
sixfold:O
during:O
the:O
war:O
to:O
30,000:O
.:O