A man is standing next to a Police van.
A man is eating dinner
A man cannot both be standing next a police van and eating dinner.
exists e1 x1 x2 x3.(to(e1,x2) & n_van(x2) & of(x2,x3) & n_police(x3) & r_next(e1) & Actor(e1,x1) & v_stand(e1) & n_man(x1))
exists p1 x1.(exists s1 x2.((x1 = x2) & n_dinner(x2) & a_eating(s1) & Theme(s1,x2)) & n_man(x1))