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 ":".
Operations
were
then
sold
to
RailAmerica
.
Operations:O
were:O
then:O
sold:O
to:O
RailAmerica:organization-company
.:O