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 ":".
The
latter
were
built
solely
for
the
Union
Pacific
Railroad
.
The:O
latter:O
were:O
built:O
solely:O
for:O
the:O
Union:organization-company
Pacific:organization-company
Railroad:organization-company
.:O