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 ":".
QT
prolongation
is
detectable
but
was
considered
to
be
too
low
to
be
of
clinical
importance
in
a
study
.
QT:O
prolongation:O
is:O
detectable:O
but:O
was:O
considered:O
to:O
be:O
too:O
low:O
to:O
be:O
of:O
clinical:O
importance:O
in:O
a:O
study:O
.:O