With no explanation, label each line with "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
However
,
by
2002
,
Mirant
Delta
was
experiencing
financial
difficulties
,
and
construction
was
suspended
.
However:O
,:O
by:O
2002:O
,:O
Mirant:organization-company
Delta:organization-company
was:O
experiencing:O
financial:O
difficulties:O
,:O
and:O
construction:O
was:O
suspended:O
.:O