The Japanese visitors observed that the Lights seemed to move slowly, but could change quickly.
(the Lights; to move slowly; ) (the Lights; could change quickly; ) (The Japanese visitors; observed; that the Lights seemed to move slowly, but could change quickly) Context(The Japanese visitors observed,List([0, 30))):(the Lights; seemed; )
The Japanese visitors observed,List([0, 30))
the Lights the Lights The Japanese visitors the Lights
to move slowly could change quickly observed seemed
that the Lights seemed to move slowly, but could change quickly