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 ":".
She
briefly
worked
as
a
teacher
before
deciding
that
social
work
should
be
her
career
.
She:O
briefly:O
worked:O
as:O
a:O
teacher:O
before:O
deciding:O
that:O
social:O
work:O
should:O
be:O
her:O
career:O
.:O