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 ":".
The
operating
principle
is
that
,
during
flight
,
the
air
is
compressed
by
the
geometry
and
speed
of
the
vehicle
and
directed
to
the
engine
at
the
bottom
of
the
aircraft
.
The:O
operating:O
principle:O
is:O
that:O
,:O
during:O
flight:O
,:O
the:O
air:O
is:O
compressed:O
by:O
the:O
geometry:O
and:O
speed:O
of:O
the:O
vehicle:O
and:O
directed:O
to:O
the:O
engine:O
at:O
the:O
bottom:O
of:O
the:O
aircraft:O
.:O