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 ":".
This
type
of
overhead
line
is
rigid
,
making
it
more
robust
and
less
prone
to
failures
.
This:O
type:O
of:O
overhead:O
line:O
is:O
rigid:O
,:O
making:O
it:O
more:O
robust:O
and:O
less:O
prone:O
to:O
failures:O
.:O