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 ":".
During
this
time
it
made
between
50
and
100
free
flights
,
in
addition
to
tethered
flights
as
a
kite
.
During:O
this:O
time:O
it:O
made:O
between:O
50:O
and:O
100:O
free:O
flights:O
,:O
in:O
addition:O
to:O
tethered:O
flights:O
as:O
a:O
kite:O
.:O