A man standing by a yellow sign.
a man sits at the bench
Standing is not sitting. A yellow sign and a bench are two different things.
exists s1 x1 x2 x3.(a_topic(x1) & by(x1,x3) & n_sign(x3) & a_yellow(s1) & Theme(s1,x3) & n_standing(x1) & of(x1,x2) & n_man(x2))
exists e1 x1 x2.(n_bench(x2) & at(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))