A man sits on a raised platform behind a decorative arch.
A person decorating an arch.
You cannot sit behind an arch and decorate it at the same time.
exists e2 e1 s1 x1 x2 x3.(on(e1,x2) & behind(x2,x3) & n_arch(x3) & a_decorative(s1) & Theme(s1,x3) & n_platform(x2) & Theme(e2,x2) & v_raise(e2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_decorate(e1) & n_arch(x3) & (x1 = x2) & n_person(x1))