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
featured
keyframes
and
tweening
in
a
track-based
graphical
interface
,
and
was
capable
of
realtime
wireframe
playback
.
It:O
featured:O
keyframes:O
and:O
tweening:O
in:O
a:O
track-based:O
graphical:O
interface:O
,:O
and:O
was:O
capable:O
of:O
realtime:O
wireframe:O
playback:O
.:O