A man is speaking a presentation while others watch a slide show.
A man is speaking a presentation about the dangers of drugs.
there is no indication the topic of the presentation is the dangers of drugs.
exists e1 p1 x1 x2.(exists e2 x3 x4 x5.(Theme(e2,x4) & Actor(e2,x3) & v_watch(e2) & n_show(x4) & of(x4,x5) & n_slide(x5) & -(x3 = x1) & n_person(x3)) & n_person(x1) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_speak(e1) & n_presentation(x2) & n_man(x1))
exists e1 x1 x2 x3 x4.(n_danger(x3) & Theme(e1,x2) & Actor(e1,x1) & v_speak(e1) & about(x2,x3) & of(x3,x4) & n_drug(x4) & n_presentation(x2) & n_man(x1))