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 ":".
There
were
no
school
uniforms
which
were
so
typical
of
prep
schools
in
that
era
.
There:O
were:O
no:O
school:O
uniforms:O
which:O
were:O
so:O
typical:O
of:O
prep:O
schools:O
in:O
that:O
era:O
.:O