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 ":".
While
running
,
it
places
its
head
and
its
tail
parallel
to
the
ground
,
and
uses
its
tail
as
a
rudder
to
help
change
its
direction
.
While:O
running:O
,:O
it:O
places:O
its:O
head:O
and:O
its:O
tail:O
parallel:O
to:O
the:O
ground:O
,:O
and:O
uses:O
its:O
tail:O
as:O
a:O
rudder:O
to:O
help:O
change:O
its:O
direction:O
.:O