There is a guy with headphones around his neck next to a guy in a hat looking off-screen.
A teacher gives a presentation
A teacher doesn't' give a presentation with  headphones around their neck.
exists p1 x1 e1 p2 x2 x3 x4 x5 x6 x7 x8.((x1 = x2) & to(x5,x6) & in(x6,x7) & exists s1.(Theme(s1,x8) & a_off-screen(s1)) & Topic(e1,p2) & Actor(e1,x8) & v_look(e1) & (x7 = x8) & n_hat(x7) & n_guy(x6) & next(x2,x5) & n_thing(x5) & with(x2,x3) & around(x3,x4) & n_neck(x4) & of(x4,x2) & n_male(x2) & n_headphone(x3) & n_guy(x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_give(e1) & n_presentation(x2) & n_teacher(x1))