A man standing in front of a projector screen
A man is giving a presentation with visuals.
A man standing in front of a projector screen may not be giving the presentation, he could be asking questions about it, or be troubleshooting the projector.
exists x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x3) & of(x3,x4) & n_screen(x4) & of(x4,x5) & n_projector(x5) & n_front(x3) & n_standing(x1) & of(x1,x2) & n_man(x2))
exists e1 x1 x2 x3.(with(e1,x3) & n_visual(x3) & Theme(e1,x2) & Actor(e1,x1) & v_give(e1) & n_presentation(x2) & n_man(x1))