Audience at an event with the stage lights as the backdrop.
The audience is waiting for the show to start.
The stage lights do not imply the beginning of the event.  The audience may not be waiting for the show to start.
exists x1 x2 x3 x4 x5.(n_backdrop(x5) & n_light(x3) & of(x3,x4) & n_stage(x4) & a_topic(x1) & at(x1,x2) & as(x2,x5) & with(x2,x3) & n_event(x2) & n_audience(x1))
exists e1 p1 x1 x2.(n_show(x2) & n_audience(x1) & for(e1,x2) & Topic(x2,p1) & exists e2.(Actor(e2,x2) & v_start(e2)) & Actor(e1,x1) & v_wait(e1))