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 ":".
It
is
the
least
abundant
of
the
stable
halogens
,
being
the
sixty-first
most
abundant
element
.
It:O
is:O
the:O
least:O
abundant:O
of:O
the:O
stable:O
halogens:O
,:O
being:O
the:O
sixty-first:O
most:O
abundant:O
element:O
.:O