A man wearing a t-shirt that has "gnu" printed on it gives a technology presentation.
The man is eating lunch.
The man cannot be eating while also giving a presentation on technology
exists e4 e3 e2 e1 x1 x2 x3 x4 x5 x6 x7.(Theme(e4,x6) & Actor(e4,x1) & v_give(e4) & n_presentation(x6) & of(x6,x7) & n_technology(x7) & on(e3,x1) & n_thing(x1) & Theme(e3,x5) & v_print(e3) & (x1 = x5) & Theme(e2,x3) & Actor(e2,x2) & v_wear(e2) & Actor(e1,x4) & v_gnu(e1) & (x3 = x4) & n_t-shirt(x3) & (x1 = x2) & n_man(x1))
exists p1 x1.(n_man(x1) & exists s1 x2.((x1 = x2) & n_lunch(x2) & a_eating(s1) & Theme(s1,x2)))