With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
The
employees
then
bought
back
the
building
with
the
help
of
local
businessmen
.
The:O
employees:O
then:O
bought:O
back:O
the:O
building:O
with:O
the:O
help:O
of:O
local:O
businessmen:O
.:O