With no explanation, label each line with "O", "building-restaurant", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Morrison
's
Cafeterias
were
founded
and
operated
as
a
racially-segregated
private
business
.
Morrison:building-restaurant
's:building-restaurant
Cafeterias:building-restaurant
were:O
founded:O
and:O
operated:O
as:O
a:O
racially-segregated:O
private:O
business:O
.:O